<ARTICLE> UT
<LEGEND>
This schedule contains summary financial information extracted from Southwest
Gas Corporation's Form 10-Q for the quarter ended March 31, 1998 and is
qualified in its entirety by reference to such financial statements.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               MAR-31-1998
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    1,377,368
<OTHER-PROPERTY-AND-INVEST>                     67,585
<TOTAL-CURRENT-ASSETS>                         245,542
<TOTAL-DEFERRED-CHARGES>                        54,842
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               1,745,337
<COMMON>                                        29,151
<CAPITAL-SURPLUS-PAID-IN>                      362,891
<RETAINED-EARNINGS>                             26,581
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 418,623
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<LONG-TERM-DEBT-NET>                           778,485
<SHORT-TERM-NOTES>                              78,000
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                    5,215
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 465,014<F1>
<TOT-CAPITALIZATION-AND-LIAB>                1,745,337
<GROSS-OPERATING-REVENUE>                      292,601
<INCOME-TAX-EXPENSE>                            22,502
<OTHER-OPERATING-EXPENSES>                     217,099
<TOTAL-OPERATING-EXPENSES>                     217,099
<OPERATING-INCOME-LOSS>                         75,502
<OTHER-INCOME-NET>                                (767)<F2>
<INCOME-BEFORE-INTEREST-EXPEN>                  74,735
<TOTAL-INTEREST-EXPENSE>                        16,280
<NET-INCOME>                                    35,953
<PREFERRED-STOCK-DIVIDENDS>                          0
<EARNINGS-AVAILABLE-FOR-COMM>                   35,953
<COMMON-STOCK-DIVIDENDS>                         5,623
<TOTAL-INTEREST-ON-BONDS>                            0
<CASH-FLOW-OPERATIONS>                         108,562
<EPS-PRIMARY>                                     1.31<F3>
<EPS-DILUTED>                                     1.30
<FN>
<F1>Includes: trust originated preferred securities of $60,000, current
liabilities, net of current long-term debt maturities and short-term debt, of
$182,432, and deferred income taxes and other credits of $222,582.
<F2>Includes distributions related to trust originated preferred securities of
$1,369.
<F3>Primary earnings per share is equal to basic earnings per share.
</FN>