| Ontario electoral district
|Bruce—Grey—Owen Sound in relation to other southwestern Ontario electoral districts
|Provincial electoral district
||Legislative Assembly of Ontario
|Pop. density (per km²)
||Bruce County, Ontario, Grey County, Ontario
||West Grey, Hanover, Chatsworth, Meaford, Owen Sound, Georgian Bluffs, Arran-Elderslie, South Bruce Peninsula, Northern Bruce Peninsula, Neyaashiinigmiing, Saugeen 29, Brockton, South Bruce, Grey Highlands
- For the federal electoral district, see Bruce—Grey—Owen Sound.
Bruce—Grey—Owen Sound is a provincial electoral district in western Ontario, Canada. It elects one member to the Legislative Assembly of Ontario.
It was created in 1999 from parts of Bruce and Grey when ridings in Ontario were redistributed to match their federal counterparts.
The riding from 1999 to 2007 included the municipalities of West Grey, Hanover, Chatsworth, Meaford, Owen Sound, Georgian Bluffs, Arran-Elderslie, South Bruce Peninsula, Northern Bruce Peninsula, Neyaashiinigmiing, Saugeen 29, plus the eastern half of Brockton and South Bruce plus the northern third of Grey Highlands.
In 2007, the riding gained the municipality of Southgate, the rest of Grey Highlands, but lost the parts of Brockton and South Bruce in the riding.
The riding is notable for running a Green Party of Ontario candidate who received 33.1% of the popular vote in the 2007 election, the largest share of the popular vote the party has ever received in a single riding.
Election results 
|- |colspan=7|Note: the 2011 election will be held on October 6, 2011.
2007 electoral reform referendum 
Coordinates: 44°N 81°W / 44°N 81°W