James Hector McRae Dunn (22 April 1886 – 8 November 1975) was an Australian politician.
He was born in Cathkin to farmer James Dunn and Honoria McRae.
He later worked for the railways, and was stores administrator for the Federal Capital Commission's construction branch from 1915.
From 1932 he ran a wine saloon in Geelong, and was private secretary to John Dedman, a federal minister.
He lost preselection in 1955 and stood unsuccessfully as an Independent Labor candidate for Geelong West.