Seaforth, Ontario is in Huron County. It was incorporated as a village in 1868 and as a town in 1875. In 2001, Seaforth was amalgamated with Brussels, Grey, McKillop and Tuckersmith to form the Municipality of Huron East (2006 pop. 9,310).
During 1850-53, Christopher and George Sparling acquired most of the present site of Seaforth anticipating the construction of the Buffalo, Brantford and Goderich Railroad through the region. George laid out a subdivision in 1856 and Christopher sold most of his land in Tuckersmith Township to a syndicate headed by James Patton of Barrie. Patton is said to have procured a railway station and named it Seaforth. Situated on the Huron Road and the railway, and a shipping point for wheat, Seaforth had a post office by December 1859.
In 1984, Seaforth's Main Street was designated as a Heritage Conservation District. Its distinguished late 19th century architecture is composed mostly of two storey brick buildings. The 5-store Cardino Block, built in 1877, is at the centre of Main Street. It has central tower with a four-faced clock that was one of the most lavish clocks of its day.