<TABLE> <S> <C>

<ARTICLE> UT
<LEGEND>
This schedule contains summary financial information extracted
from the Form 10-Q for September 30, 1999, and is qualified in its
entirety by reference to such financial statements.
</LEGEND>
<CIK> 0000066904
<NAME> MISSISSIPPI POWER COMPANY
<MULTIPLIER> 1,000

<S>                                                                 <C>
<PERIOD-TYPE>                                                             9-MOS
<FISCAL-YEAR-END>                                                   Dec-31-1999
<PERIOD-END>                                                        Sep-30-1999
<BOOK-VALUE>                                                           PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                             1,032,607
<OTHER-PROPERTY-AND-INVEST>                                               1,395
<TOTAL-CURRENT-ASSETS>                                                  136,786
<TOTAL-DEFERRED-CHARGES>                                                 59,420
<OTHER-ASSETS>                                                                0
<TOTAL-ASSETS>                                                        1,230,208
<COMMON>                                                                 37,691
<CAPITAL-SURPLUS-PAID-IN>                                               179,800
<RETAINED-EARNINGS>                                                     181,599
<TOTAL-COMMON-STOCKHOLDERS-EQ>                                          399,090
<PREFERRED-MANDATORY>                                                    35,000
<PREFERRED>                                                              31,809
<LONG-TERM-DEBT-NET>                                                    172,830
<SHORT-TERM-NOTES>                                                       43,200
<LONG-TERM-NOTES-PAYABLE>                                               119,816
<COMMERCIAL-PAPER-OBLIGATIONS>                                                0
<LONG-TERM-DEBT-CURRENT-PORT>                                            50,020
<PREFERRED-STOCK-CURRENT>                                                     0
<CAPITAL-LEASE-OBLIGATIONS>                                                   0
<LEASES-CURRENT>                                                              0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                                          378,443
<TOT-CAPITALIZATION-AND-LIAB>                                         1,230,208
<GROSS-OPERATING-REVENUE>                                               482,619
<INCOME-TAX-EXPENSE>                                                     30,183
<OTHER-OPERATING-EXPENSES>                                              381,599
<TOTAL-OPERATING-EXPENSES>                                              411,782
<OPERATING-INCOME-LOSS>                                                  70,837
<OTHER-INCOME-NET>                                                        1,216
<INCOME-BEFORE-INTEREST-EXPEN>                                           72,053
<TOTAL-INTEREST-EXPENSE>                                                 21,084
<NET-INCOME>                                                             50,969
<PREFERRED-STOCK-DIVIDENDS>                                               1,510
<EARNINGS-AVAILABLE-FOR-COMM>                                            49,459
<COMMON-STOCK-DIVIDENDS>                                                 41,600
<TOTAL-INTEREST-ON-BONDS>                                                     0
<CASH-FLOW-OPERATIONS>                                                   67,096
<EPS-BASIC>                                                                 0
<EPS-DILUTED>                                                                 0




</TABLE>