Old Ottawa South is a historic urban neighborhood in Ottawa, Ontario, Canada, known for its early 20th-century Craftsman architecture and tree-lined streets. It's nestled between the Rideau Canal and Rideau River, with Bronson Avenue to the west. The area is home to Carleton University, various local businesses, and cultural landmarks like the Mayfair Theatre. It's a politically progressive community with a mix of university affiliates and an upper-middle-class demographic. The Ottawa South History Project reflects the community's dedication to preserving its rich history. The neighborhood is also recognized for its contribution to Ottawa's heritage.