William Fraser Dunn JP (2 February 1877 – 7 October 1951) was a Labor Party politician and member of the New South Wales Legislative Assembly from 1910 until 1950.

He was educated at the local public school which he left at the age of 15 to assist on his father's farm.

Following an injury he joined the New South Wales Department of Education and taught at various schools in NSW regional areas.

This left the party without a majority in the parliament and the policy was rapidly changed, allowing Dunn to win the resulting by-election as the endorsed ALP candidate.

[2] Although Dunn had no factional power base in the Labor Party, his geniality resulted in his advancement within the parliamentary caucus.