Jack Lake may refer to:

• Jack Lake (footballer), an Australian rules footballer

• Jack Lake, Simcoe County, Ontario, community in the municipality of Clearview, Ontario
• Jack Lake (Halifax), lake in Halifax, Nova Scotia
• Jack Lake (Nipissing District), lake in Nipissing District, Ontario, within Algonquin Provincial Park
• Jack Lake (Peterborough County), lake in the Kawartha Lakes in Peterborough County, Ontario
• Jack Lake, Peterborough County, dispersed rural community, on the northwest shore of Jack Lake (Peterborough County), in Peterborough County, Ontario