1990 Smithfield state by-election

A by-election was held for the New South Wales Legislative Assembly electorate of Smithfield on 23 June 1990 because of the resignation of Janice Crosio to successfully contest the 1990 federal election for Prospect.

The Smithfield by-election was held the same day as the Heffron and Granville by-elections.

Results
Janice Crosio resigned.