|Area Land||276.26 km2 (106.66 sq mi)|
|Density||213.60/km2 (553.2/sq mi)|
|Elevation||411 m (1,348 ft)|
|Postal code||L1S, L1T, L1Z|
|Area code(s)||905, 289, 365|
Halton Hills is a town in the Regional Municipality of Halton, located in the northwestern end of the Greater Toronto Area, Ontario, Canada.
The primary population centres are Georgetown and Acton. Additionally, there are a number of hamlets and rural clusters within the town, including Ashgrove, Ballinafad (straddling the boundary with Erin), Bannockburn, Crewsons Corners (straddling the boundary with Erin, Guelph-Eramosa and Milton), Glen Williams, Henderson’s Corners, Hornby, Limehouse, Mansewood, Norval, Scotch Block, Silver Creek, Speyside, Stewarttown, Terra Cotta (straddling the boundary with Caledon), and Wildwood.
There are also natural features within these bounds, including the Niagara Escarpment, and the Bruce Trail. Many of these local features are protected by the Conservation Halton, Credit Valley Conservation & Grand River Conservation Authority.
The town is bisected by the Niagara Escarpment from southwest to northeast, and a significant portion of the rural area is located within the provincial Greenbelt. Above the Escarpment, a large proportion of the rural area is classified as environmentally sensitive wetlands, and there are several sites that are licensed for aggregate extraction, for which expansion requires detailed environmental assessment.