Regional Municipality of Niagara in the context of "Grimsby, Ontario"

St. Catharines is the most populous city in Canada's Niagara Region, the eighth largest urban area in the province of Ontario. As of 2021, St. Catharines has an area of 96.20 square kilometres (37.14 sq mi) and 136,803 residents. It lies in Southern Ontario, 51 kilometres (32 mi) south of Toronto across Lake Ontario, and is 19 kilometres (12 mi) inland from the international boundary with the United States along the Niagara River. It is the northern entrance of the Welland Canal. St. Catharines carries the official nickname "The Garden City" due to its 1,000 acres (4 km) of parks, gardens, and trails.

St. Catharines is between the Greater Toronto and Hamilton Area (GTHA) and the Canada–U.S. border at Fort Erie. Manufacturing was the city's dominant industry, as noted by the heraldic motto, "Industry and Liberality". General Motors of Canada, Ltd., the Canadian subsidiary of General Motors, was the city's largest employer, a distinction now held by the District School Board of Niagara. THK Rhythm Automotive, formerly TRW, operates a plant in the city, although in recent years, employment there has shifted from heavy industry and manufacturing to services.

Niagara Falls is a city in Ontario, Canada, adjacent to, and named after, Niagara Falls. As of the 2021 census, the city had a population of 94,415. The city is located on the Niagara Peninsula along the western bank of the Niagara River, which forms part of the Canada–United States border, with the other side being the twin city of Niagara Falls, New York. Niagara Falls is within the Regional Municipality of Niagara and a part of the St. Catharines - Niagara Census Metropolitan Area (CMA).

Tourism is a major part of the city's economy: its skyline consists of multiple high-rise hotels and observation towers that overlook the waterfalls and adjacent parkland. Souvenir shops, arcades, museums, amusement rides, indoor water parks, casinos, theatres and a convention centre are located nearby in the city's large tourist area. Other parts of the city include historic sites from the War of 1812, parks, golf courses, commercial spaces, and residential neighbourhoods.

Niagara-on-the-Lake is a town in Ontario, Canada. It is located on the Niagara Peninsula at the point where the Niagara River meets Lake Ontario, across the river from New York, United States. Niagara-on-the-Lake is in the Niagara Region of Ontario and is the only town in Canada that has a lord mayor. It had a population of 19,088 as of the 2021 Canadian census.

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. It was 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 sites of numerous battles following the American invasion of Upper Canada, and the town was razed. Niagara-on-the-Lake is home to the oldest Catholic church, the second-oldest Anglican church in Ontario, and the oldest surviving golf course in North America.