Michael MacKellar Liberal Tony Abbott Liberal The 1994 Warringah by-election was held in the Australian electorate of Warringah in New South Wales on 26 March 1994.

The by-election was triggered by the resignation of the sitting member, Liberal MP Michael MacKellar on 18 February 1994, from the safe Liberal seat.

The Warringah by-election was held on the same day as the Mackellar by-election triggered by the resignation of sitting Liberal member Jim Carlton.

During the by-elections in Mackellar and Warringah, the maverick far-right ex-Labor MP Graeme Campbell urged electors to vote for Australians Against Further Immigration.

[1] Unsuccessful candidates for Liberal preselection included former NSW attorney-general John Dowd, future MP Peter King, and future senator Concetta Fierravanti-Wells.