1990 Oshawa federal by-election

A by-election was held in the federal riding of Oshawa in Ontario on August 13, 1990, following the resignation of Leader of the New Democratic Party Ed Broadbent.

The by-election was held on the same day as another by-election in Laurier—Sainte-Marie in Quebec. The seat was held for the NDP by Michael Breaugh.

In the 1993 federal election, Breaugh lost his seat to Liberal Ivan Grose like all NDP MPs in the province.