<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 NINE MONTHS ENDED SEPTEMBER 30, 2000, CONTAINED IN
TRANSCONTINENTAL GAS PIPE LINE CORPORATION'S 2000 THIRD QUARTER REPORT ON FORM
10-Q AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.

<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                             425
<SECURITIES>                                         0
<RECEIVABLES>                                   49,284
<ALLOWANCES>                                         0
<INVENTORY>                                     72,314
<CURRENT-ASSETS>                               857,366
<PP&E>                                       4,689,933
<DEPRECIATION>                                 934,095
<TOTAL-ASSETS>                               4,868,574
<CURRENT-LIABILITIES>                          749,883
<BONDS>                                        774,974
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                             0
<OTHER-SE>                                   2,359,956
<TOTAL-LIABILITY-AND-EQUITY>                 4,868,574
<SALES>                                        749,540
<TOTAL-REVENUES>                             1,415,745
<CGS>                                          749,547
<TOTAL-COSTS>                                1,067,453
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              57,521
<INCOME-PRETAX>                                248,213
<INCOME-TAX>                                    93,430
<INCOME-CONTINUING>                            154,783
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   154,783
<EPS-BASIC>                                          0
<EPS-DILUTED>                                        0