Waterdown is a town in Canada, which since 2001 has been a community of Hamilton, Ontario.
On January 1, 2001 the new city of Hamilton was formed from the amalgamation of the Regional Municipality of Hamilton-Wentworth and its six municipalities: Hamilton, Ancaster, Dundas, Flamborough, Glanbrook, and Stoney Creek. Before amalgamation, the "old" City of Hamilton had 331,121 Hamiltonians divided into 100 neighbourhoods. The new amalgamated city has 490,268 people in over 200 neighbourhoods.
Waterdown was created from that part of East Flamborough Township on the edge of the Niagara Escarpment, just east of the junction of King's Highways Nos. 5 and 6. That intersection is known as Clappison's Corners, but continuous residential and commercial buildings between the two communities make it difficult to see any difference.