<ARTICLE>                     5
<LEGEND>
     THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED STATEMENT OF INCOME FOR THE TWELVE MONTHS ENDED DECEMBER 31, 1998
AND THE CONDENSED  BALANCE SHEET AS OF DECEMBER 31, 1998 AND IS QUALIFIED IN 
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
     (Replace this text with the legend)
</LEGEND>
<CIK>                                        0000926282                  
<NAME>                                       ADTRAN, Inc.
<MULTIPLIER>                                  1
<CURRENCY>                                    US Dollar
       
                                           
<PERIOD-TYPE>                                 12-mos
<FISCAL-YEAR-END>                             DEC-31-1998
<PERIOD-START>                                JAN-01-1998
<PERIOD-END>                                  DEC-31-1998
<EXCHANGE-RATE>                               1
<CASH>                                        $10,009,320
<SECURITIES>                                   40,795,068
<RECEIVABLES>                                  47,547,124
<ALLOWANCES>                                      958,805
<INVENTORY>                                    65,700,576
<CURRENT-ASSETS>                              167,561,408
<PP&E>                                        108,797,258
<DEPRECIATION>                                 29,902,941
<TOTAL-ASSETS>                                301,710,725
<CURRENT-LIABILITIES>                          17,026,649
<BONDS>                                        50,000,000
<PREFERRED-MANDATORY>                                   0
<PREFERRED>                                             0     
<COMMON>                                          394,235
<OTHER-SE>                                    231,388,936
<TOTAL-LIABILITY-AND-EQUITY>                  301,710,725
<SALES>                                       286,558,950
<TOTAL-REVENUES>                              286,558,950
<CGS>                                         130,009,879
<TOTAL-COSTS>                                 130,009,879
<OTHER-EXPENSES>                               62,060,907
<LOSS-PROVISION>                                        0
<INTEREST-EXPENSE>                              2,286,821
<INCOME-PRETAX>                                60,615,256
<INCOME-TAX>                                   20,305,606
<INCOME-CONTINUING>                            40,309,650
<DISCONTINUED>                                          0
<EXTRAORDINARY>                                         0
<CHANGES>                                               0
<NET-INCOME>                                   40,309,650
<EPS-PRIMARY>                                        1.03
<EPS-DILUTED>                                        1.03