Niagara-on-the-Lake is a town of 17,500 people (2016) in the Niagara Region of Ontario, Canada. It sits on the shore of Lake Ontario at the mouth of the Niagara River. It is a frequent destination for daytrippers from Niagara Falls, and a destination in its own right. It is situated in the middle of a thriving grape and fruit growing area featuring numerous wineries. There has been a recent growth in craft breweries. The town name is often abbreviated NOTL.
Niagara-on-the-Lake is important in the history of Canada: it served as the first capital of the Province of Upper Canada, the predecessor of Ontario, called Newark from 1792 to 1797. During the War of 1812, the town, the two former villages of St. David's and Queenston, and Fort George were the site of numerous battles following the American invasion of Upper Canada and the town was razed. Niagara-on-the-Lake is home to the oldest Anglican and Catholic churches in Ontario, and the oldest surviving golf course in North America.