Grimsby is a town located on the shore of Lake Ontario in the Niagara Region of Ontario, Canada. It sits at the eastern end of the Hamilton Census Metropolitan Area and is named after the English fishing town of Grimsby in north-east Lincolnshire.
The majority of Grimsby's residents live in the area between Lake Ontario and the Niagara Escarpment. This region is home to a section of the Bruce Trail, a long-distance hiking trail that traverses the area, making it notable for outdoor recreation opportunities.