Geraldton, ON, population centre, population 1,761 (2021 census), 1,838 (2016 census). Incorporated as a town in 1937, in 2001 Geraldton was amalgamated with several other communities to create the Municipality of Greenstone. Geraldton is situated in northwestern Ontario on the Canadian National Railway, 282 km northeast of Thunder Bay. Established in the early 1930s as a consequence of the Little Long Lac gold rush, the town derived its name from its two co-founders, mining entrepreneurs J.S. FitzGerald and Joseph Errington.