Ancaster is a community in the city of Hamilton in the Canadian province of Ontario. Founded in 1792, it immediately developed itself into one …Ancaster is a community in the city of Hamilton in the Canadian province of Ontario. Founded in 1792, it immediately developed itself into one of the first significant and influential early British Upper Canada communities established during the late 18th century, eventually amalgamating with the city of Hamilton in 2001. By 1823, due to its accessible waterpower and location at the juncture of prehistoric trading routes, Ancaster had become Upper Canada's largest industrial and commercial centre. Additionally, Ancaster had at that time attracted the 2nd largest populace in Upper Canada, trailing only Kingston, but surpassing the populations of nearby Toronto and Hamilton.