<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET AS OF SEPTEMBER 30, 2000 AND DECEMBER 31, 1999 AND
THE STATEMENT OF OPERATIONS FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30,
2000 AND SEPTEMBER 30, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000884269
<NAME> ALPHA PRO TECH, LTD.
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 9-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-2000
<PERIOD-START> JUL-01-2000 JAN-01-2000
<PERIOD-END> SEP-30-2000 SEP-30-2000
<CASH> 1,050 1,050
<SECURITIES> 0 0
<RECEIVABLES> 3,887 3,887
<ALLOWANCES> 40 40
<INVENTORY> 2,887 2,887
<CURRENT-ASSETS> 7,990 7,990
<PP&E> 4,185 4,185
<DEPRECIATION> 1,634 1,634
<TOTAL-ASSETS> 10,908 10,908
<CURRENT-LIABILITIES> 2,552 2,552
<BONDS> 0 0
0 0
0 0
<COMMON> 242 242
<OTHER-SE> 24,319 24,319
<TOTAL-LIABILITY-AND-EQUITY> 10,908 10,908
<SALES> 5,444 15,515
<TOTAL-REVENUES> 5,444 15,515
<CGS> 3,104 9,052
<TOTAL-COSTS> 3,104 9,052
<OTHER-EXPENSES> 1,918 5,279
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 3 11
<INCOME-PRETAX> 419 1,173
<INCOME-TAX> 0 0
<INCOME-CONTINUING> 419 1,173
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 419 1,173
<EPS-BASIC> 0.02 0.05
<EPS-DILUTED> 0.02 0.05
</TABLE>