Whitby is a provincial electoral district in Ontario, Canada, that was previously represented in the Legislative Assembly of Ontario as Whitby-Oshawa.

The new riding was created through the 2015 Representation Act for the 2018 provincial election,[1] with the district losing some territory to the district of Oshawa to more closely align to the actual town's borders.

[2] The riding was created for the 2018 general provincial election and consists of the Town of Whitby.

The previous district included sections of Oshawa and Ajax.

2017 estimates; figures derived from Canada 2016 Census