United States

                       Securities and Exchange Commission

                             Washington, D.C. 20549


                                    Form 11-K



   [X]   ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934


                   For the fiscal year ended December 31, 2003


                                       OR


   [ ]   TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934


                          Commission file number 1-7784


     A. Full title of the plan and the address of the plan, if different from
that of the issuer named below:

                                CENTURYTEL, INC.
                     UNION RETIREMENT SAVINGS PLAN AND TRUST




     B. Name of issuer of the securities held pursuant to the plan and the
address of its principal executive office:


                                CENTURYTEL, INC.
                              100 CENTURYTEL DRIVE
                                MONROE, LA 71203








             Report of Independent Registered Public Accounting Firm



The Board of Directors
CenturyTel, Inc.:

We have audited the accompanying statements of net assets available for benefits
of CenturyTel, Inc. Union Retirement Savings Plan and Trust as of December 31,
2003 and 2002, and the related statement of changes in net assets available for
benefits for the year ended December 31, 2003. These financial statements are
the responsibility of the Plan's management. Our responsibility is to express an
opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the net assets available for benefits of CenturyTel, Inc.
Union Retirement Savings Plan and Trust as of December 31, 2003 and 2002, and
the changes in net assets available for benefits for the year ended December 31,
2003 in conformity with U.S. generally accepted accounting principles.

Our audits were performed for the purpose of forming an opinion on the basic
financial statements taken as a whole. The supplemental schedule of assets (held
at end of year) is presented for the purpose of additional analysis and is not a
required part of the basic financial statements but is supplementary information
required by the Department of Labor's Rules and Regulations for Reporting and
Disclosure under the Employee Retirement Income Security Act of 1974. This
supplemental schedule is the responsibility of the Plan's management. The
supplemental schedule has been subjected to the auditing procedures applied in
the audits of the basic financial statements and, in our opinion, is fairly
stated in all material respects in relation to the basic financial statements
taken as a whole.

KPMG LLP

/s/ KPMG LLP


Shreveport, Louisiana
June 9, 2004






                                CENTURYTEL, INC.
                     UNION RETIREMENT SAVINGS PLAN AND TRUST
                 Statements of Net Assets Available for Benefits
                           December 31, 2003 and 2002




                                                             2003          2002
--------------------------------------------------------------------------------
                                                                
PLAN ASSETS
    Investments, at fair value                        $ 9,468,857     7,876,480
    Contributions receivable - employer                    16,790             -
--------------------------------------------------------------------------------

NET ASSETS AVAILABLE FOR BENEFITS                     $ 9,485,647     7,876,480
================================================================================


See accompanying notes to financial statements.




                                CENTURYTEL, INC.
                     UNION RETIREMENT SAVINGS PLAN AND TRUST
            Statement of Changes in Net Assets Available for Benefits
                      For the year ended December 31, 2003



--------------------------------------------------------------------------------
                                                                    
Additions to net assets:
Investment income:
   Net appreciation in fair value of investments:
       Mutual funds                                               $      886,676
       Common stocks                                                     284,672
   Dividend and other income                                             110,858
   Interest income                                                        32,770
--------------------------------------------------------------------------------
          Net investment income                                        1,314,976
--------------------------------------------------------------------------------

Contributions:
   Participants                                                          427,287
   Employer                                                              204,222
--------------------------------------------------------------------------------
          Total contributions                                            631,509
--------------------------------------------------------------------------------
          Total investment income and contributions                   1,946,485
--------------------------------------------------------------------------------

Deductions from net assets:
   Participant withdrawals                                               337,318
--------------------------------------------------------------------------------

Net increase                                                           1,609,167

Net assets available for benefits:

   Beginning of year                                                   7,876,480
--------------------------------------------------------------------------------

   End of year                                                    $    9,485,647
================================================================================


See accompanying notes to financial statements.




                                CENTURYTEL, INC.
                     UNION RETIREMENT SAVINGS PLAN AND TRUST
                          Notes to Financial Statements
                           December 31, 2003 and 2002


(1)   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND PROVISIONS OF THE PLAN

      Basis of Presentation

      The CenturyTel, Inc. Union Retirement Savings Plan and Trust (the Plan)
      was established on April 1, 1992. The accompanying financial statements of
      the Plan have been prepared on the accrual basis of accounting and present
      the net assets available for benefits as of December 31, 2003 and 2002 and
      changes in net assets available for benefits for the year ended December
      31, 2003. The Plan has made estimates in preparing the accompanying
      financial statements in accordance with U.S. generally accepted accounting
      principles. Actual results could differ from those estimates.

      The assets of the Plan are invested by the Trustee in various investment
      programs (funds) which are described in Note 2.

      The following description of the Plan provides only general information.
      Participants should refer to the Plan Document for a more complete
      description of the Plan's provisions.

      Participation

      Participation in the Plan is available to each employee whose compensation
      and conditions of employment are covered by a collective bargaining
      agreement between the Communications Workers of America, Local 4370 and
      CenturyTel of Ohio, Inc. The Plan sponsor is CenturyTel, Inc. (the
      Company), the parent company of CenturyTel of Ohio, Inc.

      In order to participate in the Plan, an employee must execute a Salary
      Deferral Agreement with the Company. In the Salary Deferral Agreement,
      which is executed either on-line or by telephone, an employee agrees to a
      deferral of between one percent and twenty-five percent of his base pay;
      however, the total amount contributed to the Plan cannot exceed $12,000
      for 2003 (as adjusted from year to year in accordance with Federal Law).
      The percentage of compensation a participant elects to defer applies to
      the participant's base pay not in excess of $200,000 for 2003 (as adjusted
      in accordance with Federal Law) excluding severance pay, disability pay,
      reimbursements or other expense allowances, fringe benefits, moving
      expenses, deferred compensation, and welfare benefits. The amount of
      compensation deferred by each participant is credited to an account
      (Elective Deferral Account) maintained for each participant by the
      Trustee.

      Participants age 50 years or older are allowed to make an additional
      contribution to the Plan each year in excess of the otherwise prescribed
      limits. The amount of the allowable additional contribution for a
      participant in 2003 was $2,000; this amount will increase by $1,000 each
      year to a maximum of $5,000 in 2006 (which will thereafter be adjusted
      annually).

      An employee is permitted to transfer to the Plan as a contribution his
      interest in another plan qualified under Section 401(k) of the Internal
      Revenue Code, as amended (the Code). Such contribution must qualify as a
      "rollover" contribution described in Section 402(c) or 408(d)(3) of the
      Code. Such a rollover will be credited to a rollover account on behalf of
      the participant (the Rollover/Transfer Account).

      As of the end of each payroll period, the Company contributes to an
      account (Employer Match Account) for each participant a contribution equal
      to 55% of each such participant's contribution during such payroll period;
      however, this matching contribution applies only to the first 6% of such
      participant's base compensation contributed to the Plan by the employee.
      The Board of Directors of the Company may, at its discretion, elect at the
      end of each year to contribute an additional amount to participants'
      accounts (Additional Match Account). During 2003, the Company contributed
      $204,222 to the Plan, of which $187,432 related to contributions made to
      the Employer Match Account and $16,790 related to contributions made to
      the Additional Match Account.



      The interest of a participant in his Elective Deferral Account and his
      Rollover/Transfer Account is fully vested and non-forfeitable at all
      times.

      The interest of a participant in his Employer Match Account and the
      Additional Match Account become fully vested after three years of service.
      A participant with less than three years of service has no vested interest
      in these accounts.

      Reports to Participants

      Participants are furnished with quarterly statements which set forth the
      status of their accounts in the Plan.

      Forfeitures

      A participant's non-vested account balances shall be forfeited as of the
      date upon which the participant's employment has terminated with the
      Company. Forfeiture amounts may be utilized first to satisfy any
      restorations for the year. Then any remaining forfeitures shall be
      utilized to reduce Company contributions.

      Distributions

      If the employment of a participant with the employer ceases because of
      death, retirement, disability, termination of employment or for any other
      reason, the participant's vested interest in the Plan may be distributed
      to him or to his beneficiary in a lump sum or in periodic installments. If
      the participant dies without designating a beneficiary, his beneficiary
      shall be, in the order listed, (i) his spouse, (ii) his children, or (iii)
      his estate.

      Withdrawals

      A participant who is an employee may make withdrawals from his after-tax
      investment account and may withdraw the entire balance.

      A participant who is an employee and over age 59 1/2 may make withdrawals
      from his vested investment accounts prior to normal distribution
      requirements being met. A participant may make withdrawals from his
      Rollover/Transfer Account at any time. In addition, a hardship withdrawal
      may be made from an Elective Deferral Account or a Rollover/Transfer
      Account only as a result of financial hardship related to unreimbursable
      educational expenses, medical expenses which are not reimbursable by
      insurance, the need to pay for the funeral expenses of a family member,
      the prevention of eviction or foreclosure from the participant's principal
      residence, or for the purchase of the participant's principal residence.
      The determination of the existence of a financial hardship and the amount
      required to be distributed to meet the need created by the hardship shall
      be made uniformly and without discrimination at the sole discretion of the
      Plan administrator.

      Loans to Participants

      The Plan has a provision whereby a participant can borrow from his
      Elective Deferral Account or Rollover/Transfer Account. The maximum loan
      is $50,000 reduced by the excess, if any, of the highest outstanding loan
      balance during the previous year over the outstanding balance on the date
      of the new loan or 50% of the vested account balance. The loans are repaid
      through payroll deductions and the interest rate is the prime rate
      published in the Wall Street Journal on the last day of the previous
      quarter plus 1%. The loan repayment period may not exceed five years
      except for loans for the purchase of the participant's principal residence
      which may be for any period not to exceed fifteen years.

      Trustee

      The Trustee of the Plan, as of December 31, 2003, was T. Rowe Price Trust
      Company (T. Rowe Price). The Board of Directors of the Company may remove
      the Trustee and appoint a successor trustee. The Company and the Trustee
      have entered into a Trust Agreement which provides for the establishment
      of a Trust for the purpose of holding and investing the contributions to
      the Trust pursuant to the provisions of the Plan.



      Administration

      The Company has appointed a committee to administer the Plan. The
      individuals who administer the Plan serve at the discretion of the Board
      of Directors of the Company and may be removed by the Board of Directors
      at any time. The administrative costs of the Plan are paid by the Company.

      Investment Valuation and Income Recognition

      Investments in CenturyTel, Inc. Common Stock (CenturyTel Common Stock) are
      valued at the closing market price on December 31, 2003 and 2002,
      respectively. Other investments in the funds, which consist primarily of
      shares of mutual funds, are valued by the Trustee based on the market
      value at year-end of the underlying assets of each fund. Purchases and
      sales of securities are recorded on a trade date basis. Loans to
      participants are valued at principal amount outstanding which approximates
      market value. Interest income is recorded on the accrual basis.

      Plan Termination

      Although it has not expressed any intention to do so, the Company has the
      right under the Plan to change, suspend or terminate the Plan at any time,
      subject to the provisions set forth in the Employee Retirement Income
      Security Act of 1974. However, the Company is required to comply with all
      relevant provisions of the applicable labor agreement.

(2)   DESCRIPTION OF THE FUNDS

      The following is a description of each of the funds which had outstanding
      balances and were available to Plan participants as of December 31, 2003:

      (a)  T. Rowe Price Equity Index 500 Fund - consists of investments in the
           same stocks and in substantially the same percentages as the S & P
           500 Index ($3,755,919 and $2,746,665 at December 31, 2003 and 2002,
           respectively).

      (b)  CenturyTel Common Stock Fund - consists of shares of CenturyTel
           Common Stock ($2,890,066 and $2,538,918 at December 31, 2003 and
           2002, respectively).

      (c)  Loan Fund - represents loans to participants from the participants'
           investment accounts ($401,995 and $437,366 at December 31, 2003 and
           2002, respectively).

      (d)  T. Rowe Price Summit Cash Reserves Fund - consists primarily of
           investments in various money market instruments ($1,127,716 and
           $1,104,899 at December 31, 2003 and 2002, respectively).

      (e)  T. Rowe Price Equity Income Fund - consists primarily of investments
           in U. S. and foreign common stocks ($82,723 and $114,290 at December
           31, 2003 and 2002, respectively).

      (f)  Janus Overseas Fund - consists primarily of investments in foreign
           equity securities ($59,089 and $32,974 at December 31, 2003 and
           2002, respectively).

      (g)  Janus Fund - consists primarily of investments in U. S. and foreign
           equity securities ($74,024 and $42,416 at December 31, 2003 and
           2002, respectively).

      (h)  T. Rowe Price Mid-Cap Growth Fund - consists primarily of investments
           in common stocks of companies whose market capitalization falls
           within the range of companies in the S&P MidCap 400 Index ($79,062
           and $49,241 at December 31, 2003 and 2002, respectively).

      (i)  Morgan Stanley Institutional Fund Small Company Growth
           Portfolio B - consists primarily of investments in common stocks of
           small companies ($83,586 and $51,530 at December 31, 2003 and 2002,
           respectively).

      (j)  PIMCO Total Return Fund - consists primarily of investments in debt
           securities ($702,865 and $599,234 at December 31, 2003 and 2002,
           respectively).


      (k)  BGI Asset Allocation Fund - consists primarily of investments in
           common stocks, U. S. Treasury bonds and money market instruments
           ($47,852 and $31,761 at December 31, 2003 and 2002, respectively).

      (l)  BGI LifePath Retirement Fund - consists primarily of investments
           in U.S. and foreign equity and debt securities and money market
           instruments and is managed for investors planning to retire (or begin
           to withdraw substantial portions of their investment) in the near
           future ($15,197 and $10,355 at December 31, 2003 and 2002,
           respectively).

      (m)  BGI LifePath 2010 Fund - consists primarily of investments in U. S.
           and foreign equity and debt securities and money market instruments
           and is managed for investors planning to retire (or begin to withdraw
           substantial portions of their investment) around the year 2010
           ($123,261 and $99,731 at December 31, 2003 and 2002, respectively).

      (n)  BGI LifePath 2020 Fund - consists primarily of investments in U.S.
           and foreign equity and debt securities and money market instruments
           and is managed for investors planning to retire (or begin to withdraw
           substantial portions of their investment) around the year 2020
           ($16,732 and $12,761 at December 31, 2003 and 2002, respectively).

      (o)  BGI LifePath 2030 Fund - consists primarily of investments in U.S.
           and foreign equity and debt securities and money market instruments
           and is managed for investors planning to retire (or begin to withdraw
           substantial portions of their investment) around the year 2030
           ($6,178 and $2,578 at December 31, 2003 and 2002, respectively).

      (p)  BGI LifePath 2040 Fund - consists primarily of investments in U. S.
           and foreign equity and debt securities and money market instruments
           and is managed for investors planning to retire (or begin to withdraw
           substantial portions of their investment) around the year 2040
           ($2,592 and $1,761 at December 31, 2003 and 2002, respectively).

      Investments in CenturyTel Common Stock Fund, T. Rowe Price Equity Index
      500 Fund, T. Rowe Price Summit Cash Reserves Fund and PIMCO Total Return
      Fund were each greater than 5% of assets available for benefits at
      December 31, 2003.

      A participant may instruct that all contributions to his accounts be
      allocated among the various funds. A participant may change his investment
      allocation instructions and contribution percentage at any time.

(3)   INCOME TAXES

      The Plan and related trust are designed to meet the necessary requirements
      of Internal Revenue Code Section 401(a) and, accordingly, the trust
      underlying the Plan is exempt from income taxation pursuant to Internal
      Revenue Code Section 501(a). A favorable determination letter was received
      in October 2003 related to the Plan.

(4)   RELATED PARTY TRANSACTIONS

      Certain Plan investments are shares of mutual funds managed by T. Rowe
      Price, Barclays Global Investors Funds, Inc. (Barclays), Morgan
      Stanley Investment Management Inc. (Morgan Stanley), Janus
      Capital Corporation (Janus), or Pacific Investment Management Company
      (PIMCO). T. Rowe Price is the Trustee as defined by the Plan.
      Therefore, T. Rowe Price, Barclays, Morgan Stanley, Janus and PIMCO
      qualify as parties-in-interest. Fees paid by the Company to T. Rowe
      Price for trustee, record keeping and other services amounted to
      $16,550 for the year ended December 31, 2003.



(5)   CONCENTRATION OF INVESTMENTS

      As of December 31, 2003 and 2002, 30.5% and 32.2%, respectively, of the
      assets available for benefits were invested in CenturyTel Common Stock.
      Substantially all of the remaining assets available for benefits were
      invested in mutual funds managed by T. Rowe Price, Barclays, Morgan
      Stanley, Janus, and PIMCO.



                                CENTURYTEL, INC.
                     UNION RETIREMENT SAVINGS PLAN AND TRUST

         Schedule H, Line 4i - Schedule of Assets (Held at End of Year)

                                December 31, 2003



   Identity of issuer, borrower,                                                         Current
     lessor or similar party                       Description of Investment              Value
--------------------------------------------------------------------------------------------------------------

                                                                                          
Investment in CenturyTel Common Stock          88,598  shares at $32.62 per share    $  2,890,066     (Note 1)

Loan Fund (interest rates ranged
 from 4.74% to 12.50%)                              -                                     401,995

Investment in Mutual Funds for
 Qualified Employee Benefit Plans:
    Managed by Barclays:
        Asset Allocation Fund                   5,129  shares at $9.33 per share           47,852
        LifePath Retirement Fund                1,378  shares at $11.03 per share          15,197
        LifePath 2010 Fund                     10,021  shares at $12.30 per share         123,261
        LifePath 2020 Fund                      1,184  shares at $14.13 per share          16,732
        LifePath 2030 Fund                        437  shares at $14.13 per share           6,178
        LifePath 2040 Fund                        167  shares at $15.47 per share           2,592
    Managed by Janus:
        Janus Overseas Fund                     2,860  shares at $20.66 per share          59,089
        Janus Fund                              3,154  shares at $23.47 per share          74,024
    Managed by  Morgan Stanley:
        Institutional Small Company
         Growth Portfolio B                     8,006  shares at $10.44 per share          83,586
    Managed by PIMCO:
        PIMCO Total Return Fund                65,627  shares at $10.71 per share         702,865     (Note 1)
    Managed  by T. Rowe Price:
        Equity Income Fund                      3,424  shares at $24.16 per share          82,723
        Equity Index 500 Fund                 125,406  shares at $29.95 per share       3,755,919     (Note 1)
        Mid-Cap Growth Fund                     1,843  shares at $42.90 per share          79,062
        Summit Cash Reserves Fund           1,127,716  shares at $1.00 per share        1,127,716     (Note 1)
--------------------------------------------------------------------------------------------------------------
                                                                                     $  9,468,857
==============================================================================================================


Barclays, Janus, Morgan Stanley, PIMCO and T. Rowe Price are considered
parties-in-interest. Additionally, CenturyTel, Inc., as sponsor of the Plan, is
considered a party-in-interest.

Notes:  (1) These investments are greater than 5% of assets available
            for benefits.

        (2) Information on cost of investments is excluded as all investments
            are participant directed.

See accompanying report of independent registered public accounting firm.


                                    SIGNATURE


Pursuant to the requirements of the Securities Exchange Act of 1934, the
Retirement Committee has duly caused this annual report to be signed on its
behalf by the undersigned thereunto duly authorized.


                                    CenturyTel, Inc.
                                    Union Retirement Savings Plan and Trust


June 25, 2004                       /s/ R. Stewart Ewing, Jr.
                                    ------------------------------
                                    R. Stewart Ewing, Jr.
                                    Retirement Committee Member and
                                    Executive Officer of Issuer of
                                    Plan Securities





                                CENTURYTEL, INC.
                     UNION RETIREMENT SAVINGS PLAN AND TRUST

                                Index to Exhibits



    Exhibit
    Number
-----------------------------------------------------------------------------
    23.1   Consent of Independent Registered Public Accounting Firm