<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 SIX MONTHS ENDED JUNE 30, 2000, CONTAINED IN TRANSCONTINENTAL GAS
PIPELINE CORPORATION'S 2000 SECOND QUARTER REPORT ON FORM 10-Q AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                             296
<SECURITIES>                                         0
<RECEIVABLES>                                   35,117
<ALLOWANCES>                                         0
<INVENTORY>                                     63,284
<CURRENT-ASSETS>                               791,835
<PP&E>                                       4,555,862
<DEPRECIATION>                                 864,345
<TOTAL-ASSETS>                               4,734,041
<CURRENT-LIABILITIES>                          439,110
<BONDS>                                        975,095
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                             0
<OTHER-SE>                                   2,321,094
<TOTAL-LIABILITY-AND-EQUITY>                 4,734,041
<SALES>                                        454,584
<TOTAL-REVENUES>                               924,283
<CGS>                                          454,591
<TOTAL-COSTS>                                  666,885
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              36,783
<INCOME-PRETAX>                                185,613
<INCOME-TAX>                                    69,692
<INCOME-CONTINUING>                            115,921
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   115,921
<EPS-BASIC>                                          0
<EPS-DILUTED>                                        0