<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEET AND THE CONDENSED CONSOLIDATED STATEMENT OF
INCOME FOR THE THREE MONTHS ENDED MARCH 31, 2000, CONTAINED IN TRANSCONTINENTAL
GAS PIPE LINE CORPORATION'S 2000 FIRST QUARTER REPORT ON FORM 10-Q AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                           1,197
<SECURITIES>                                         0
<RECEIVABLES>                                   16,335
<ALLOWANCES>                                         0
<INVENTORY>                                     68,201
<CURRENT-ASSETS>                               766,874
<PP&E>                                       4,488,339
<DEPRECIATION>                                 824,179
<TOTAL-ASSETS>                               4,685,049
<CURRENT-LIABILITIES>                          459,710
<BONDS>                                        975,214
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                             0
<OTHER-SE>                                   2,257,223
<TOTAL-LIABILITY-AND-EQUITY>                 4,685,049
<SALES>                                        201,082
<TOTAL-REVENUES>                               411,037
<CGS>                                          201,089
<TOTAL-COSTS>                                  310,352
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              25,230
<INCOME-PRETAX>                                 53,954
<INCOME-TAX>                                    19,959
<INCOME-CONTINUING>                             33,995
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    33,995
<EPS-BASIC>                                          0
<EPS-DILUTED>                                        0