<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CALPINE
CORPORATION'S CONSOLIDATED BALANCE SHEET AS OF JUNE 30, 2000 AND FROM THE
CONSOLIDATED STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30, 2000 AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH STATEMENTS
</LEGEND>
<CIK> 0000916457
<NAME> CALPINE CORPORATION
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLAR

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               JUN-30-2000
<EXCHANGE-RATE>                                      1
<CASH>                                         187,777
<SECURITIES>                                         0
<RECEIVABLES>                                  248,359
<ALLOWANCES>                                     2,995
<INVENTORY>                                     23,287
<CURRENT-ASSETS>                               524,931
<PP&E>                                       4,512,199
<DEPRECIATION>                                 285,440
<TOTAL-ASSETS>                               5,540,091
<CURRENT-LIABILITIES>                          304,178
<BONDS>                                              0
<PREFERRED-MANDATORY>                          618,756
<PREFERRED>                                          0
<COMMON>                                           128
<OTHER-SE>                                   1,045,717
<TOTAL-LIABILITY-AND-EQUITY>                 5,540,091
<SALES>                                        505,594
<TOTAL-REVENUES>                               599,085
<CGS>                                          355,220
<TOTAL-COSTS>                                  416,331
<OTHER-EXPENSES>                                33,937
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              32,318
<INCOME-PRETAX>                                115,015
<INCOME-TAX>                                    45,182
<INCOME-CONTINUING>                             69,833
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    69,833
<EPS-BASIC>                                        .55
<EPS-DILUTED>                                      .52