The Petrolia Farmers’ Market is located in the heart of beautiful downtown Petrolia. We can be found directly behind the Petrolia Library. -- We invite you to come and spend your Saturday mornings at one of the best farmers’ markets in Lambton County. -- You will find a wide variety of local, home grown products. -- Get Real, Get Fresh, Get Local at the Petrolia Farmers Market Saturday morning from May to October at 396 Fletcher Street.