<ARTICLE> UT
<CIK> 0000022099
<NAME> COLUMBIA ENERGY GROUP AND SUBSIDIARIES

   <NUMBER> 1
   <NAME> CEG
<MULTIPLIER> 1,000

                                                  
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000             DEC-31-2000
<PERIOD-START>                             APR-01-2000             JAN-01-2000
<PERIOD-END>                               JUN-30-2000             JUN-30-2000
<BOOK-VALUE>                                  PER-BOOK                PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    4,260,400               4,260,400
<OTHER-PROPERTY-AND-INVEST>                  1,127,500               1,127,500
<TOTAL-CURRENT-ASSETS>                       1,041,900               1,041,900
<TOTAL-DEFERRED-CHARGES>                        11,400                  11,400
<OTHER-ASSETS>                                 350,600                 350,600
<TOTAL-ASSETS>                               6,791,800               6,791,800
<COMMON>                                           800                     800
<CAPITAL-SURPLUS-PAID-IN>                    1,616,100               1,616,100
<RETAINED-EARNINGS>                            748,100                 748,100
<TOTAL-COMMON-STOCKHOLDERS-EQ>               2,115,600               2,115,600
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<LONG-TERM-DEBT-NET>                         1,639,200               1,639,200
<SHORT-TERM-NOTES>                                   0                       0
<LONG-TERM-NOTES-PAYABLE>                            0                       0
<COMMERCIAL-PAPER-OBLIGATIONS>                 325,400                 325,400
<LONG-TERM-DEBT-CURRENT-PORT>                  311,100                 311,100
<PREFERRED-STOCK-CURRENT>                            0                       0
<CAPITAL-LEASE-OBLIGATIONS>                      2,500                   2,500
<LEASES-CURRENT>                                     0                       0
<OTHER-ITEMS-CAPITAL-AND-LIAB>               2,709,100               2,709,100
<TOT-CAPITALIZATION-AND-LIAB>                6,791,800               6,791,800
<GROSS-OPERATING-REVENUE>                      462,800               1,449,000
<INCOME-TAX-EXPENSE>                            45,200                 134,100
<OTHER-OPERATING-EXPENSES>                     307,100                 652,800
<TOTAL-OPERATING-EXPENSES>                     383,300               1,095,800
<OPERATING-INCOME-LOSS>                         79,500                 353,200
<OTHER-INCOME-NET>                              93,800                  98,100
<INCOME-BEFORE-INTEREST-EXPEN>                 173,300                 451,300
<TOTAL-INTEREST-EXPENSE>                        45,200                  90,900
<NET-INCOME>                                    47,700                 197,400
<PREFERRED-STOCK-DIVIDENDS>                          0                       0
<EARNINGS-AVAILABLE-FOR-COMM>                   47,700                 197,400
<COMMON-STOCK-DIVIDENDS>                        36,200                  35,100
<TOTAL-INTEREST-ON-BONDS>                       34,100                  68,200
<CASH-FLOW-OPERATIONS>                         320,000                 527,700
<EPS-BASIC>                                       0.60                    2.45
<EPS-DILUTED>                                     0.59                    2.43