Template:1990 Ontario general election/York South

! style="text-align:right;" colspan=3 |Total valid votes ! style="text-align:right;" |24,949 ! style="text-align:right;" |100.00 ! style="text-align:right;" colspan=3 |Rejected, unmarked and declined ballots ! style="text-align:right;" |406 ! style="text-align:right;" | ! style="text-align:right;" colspan=3 |Turnout ! style="text-align:right;" |25,355 ! style="text-align:right;" |66.80 ! style="text-align:right;" colspan=3 |Electors on the lists ! style="text-align:right;" |37,959 ! style="text-align:right;" |
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