Markham—Stouffville (provincial electoral district)

Markham—Stouffville is a provincial electoral district in Ontario, Canada, that has been represented in the Legislative Assembly of Ontario since the 2007 provincial election. It encompasses the portions of the Regional Municipality of York within the towns of Markham and Whitchurch-Stouffville.

Prior to 2007, the area was primarily represented by the ridings of Markham and Oak Ridges. The riding's boundaries have been adjusted slightly in subsequent redistributions, most recently in 2018, primarily to account for population growth and shifts.

The riding is generally considered a competitive constituency, with both the Progressive Conservative and Liberal parties having held the seat since its creation.

Key demographic features of Markham—Stouffville include a high proportion of immigrants, a significant Chinese-Canadian population, and a mix of urban and suburban communities. The local economy is diverse, with strengths in technology, manufacturing, and professional services.