<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
RESPIRONICS, INC. FORM 10-Q FOR THE QUARTER ENDED 3/31/99 AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                                                  
<PERIOD-TYPE>                   9-MOS                   9-MOS
<FISCAL-YEAR-END>                          JUN-30-1999             JUN-30-1998
<PERIOD-START>                             JUL-01-1998             JUL-01-1997
<PERIOD-END>                               MAR-31-1999             MAR-31-1998
<CASH>                                          19,613                  18,501
<SECURITIES>                                         0                       0
<RECEIVABLES>                                  121,353                  95,567
<ALLOWANCES>                                     9,268                   5,750
<INVENTORY>                                     59,482                  56,140
<CURRENT-ASSETS>                               222,715                 176,748
<PP&E>                                         113,010                  90,412
<DEPRECIATION>                                  55,054                  45,089
<TOTAL-ASSETS>                                 361,264                 306,104
<CURRENT-LIABILITIES>                           60,670                  52,584
<BONDS>                                         99,659                  61,594
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           330                     324
<OTHER-SE>                                     199,830                 191,032
<TOTAL-LIABILITY-AND-EQUITY>                   361,264                 306,104
<SALES>                                        267,491                 266,350
<TOTAL-REVENUES>                                     0                       0
<CGS>                                          138,193                 136,007
<TOTAL-COSTS>                                        0                       0
<OTHER-EXPENSES>                                89,190                 129,589
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               3,558                   3,039
<INCOME-PRETAX>                                 36,549                 (2,285)
<INCOME-TAX>                                    14,620                   3,158
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    21,930                 (5,442)
<EPS-PRIMARY>                                     0.69                  (0.17)
<EPS-DILUTED>                                     0.68                  (0.17)