Halton was a provincial electoral district in Central Ontario, Canada.

The territory comprising Halton was redistributed on several occasions between 1967 and 1999: With the passage of the Representation Act, 1996,[4] the electoral district of Halton was revived, and its boundaries were declared to be contiguous with those of the federal electoral district.

Subsequent adjustments to boundaries have been consequential upon representation orders made under the federal Electoral Boundaries Readjustment Act[5] that were subsequently incorporated into Ontario law.

[6] The new riding included all of the Regional Municipality of Halton north of a line following Dundas Street to Highway 407 to Upper Middle Road to Walkers Line to the QEW to Burlington City limits to Upper Middle Road.

Also, the territory east of Eighth Line and south of Dundas Street was also lost.