York—Simcoe (provincial electoral district)

Our Lady of the Lake Catholic Academy (O.L.L.) is a high school in Keswick, Ontario, Canada in the York Catholic District School Board. The high school's philosophy and unique inclusion of grades 7 and 8 were cited by Principal Mike Nasello in a Toronto Sun interview explaining the school's jump from a 4.8 to a 7.9 rating in the Fraser Institute's rating between 2002 and 2007. Over 90% of first-time writers of the province's literary test passed in 2007 compared with 67.1% in 2002.

Keswick High School is a public high school in the York Region District School Board. It is located in Keswick, Ontario, and serves Grade 9 to 12 students from the growing Keswick community. It follows the curriculum standards set by the Ontario Ministry of Education and was officially opened in September 2000.

Keswick (/ˈkɛzˌwɪk/) is a community located in the Canadian province of Ontario. Situated in Cook's Bay on Lake Simcoe, 72 km (45 mi) north of Toronto. Keswick is part of the Town of Georgina, the northernmost municipality in the Regional Municipality of York. In the Canada 2016 Census, the municipal population of Keswick was 26,757. Roches Point (44°16′19″N 79°29′59″W) is a small residential community on the shore of Lake Simcoe in Keswick.

Cook's Bay is the southernmost bay of Lake Simcoe in Ontario, Canada. Most of the southern part of the bay is within the jurisdiction of Georgina, a town in the Regional Municipality of York. Its western end is in Simcoe County, and a small portion from the mouth of the Holland River to the Simcoe County border is within Bradford West Gwillimbury. The largest community on the shores of the bay is Keswick. It was named by John Graves Simcoe, the first Lieutenant-Governor of Upper Canada, for James Cook, who had served as master aboard HMS Pembroke in 1759 under the command of Captain John Simcoe, the Lieutenant-Governor's father. The bay is used for fishing, and is especially known for yellow perch. It attracts windsurfers and kitesurfers throughout the year, and its northern end features many cottages that are part of Ontario's cottage country. Marinas and motel accommodations are available.

The Holland River is a river in Ontario, Canada, that drains the Holland River watershed into Cook's Bay, the southern extremity of Lake Simcoe. The river flows generally north, and its headwaters lie in the Oak Ridges Moraine. The Holland River watershed is approximately 600 square kilometres (230 sq mi), spanning an area that includes New Tecumseth, King Township, Newmarket, Aurora, East Gwillimbury, and Whitchurch-Stouffville. The river's watershed also contains the Holland Marsh, a fertile farmland region renowned for its vegetable production. The river was originally known as Micicaquean Creek, its indigenous name. It was renamed by Lieutenant-Governor Simcoe after Captain Samuel (Johannes) Holland, (1729–1801), Dutch-born first Surveyor General of British North America.The Lake Simcoe Region Conservation Authority is responsible for leading the protection and environmental health of the Holland River, as it is within the Lake Simcoe watershed area.

Queensville is a village within the Town of East Gwillimbury, Ontario, Canada.

Queensville (Rollick Airpark) Aerodrome (TC LID: CRA2) is 1.4 nautical miles (2.6 km; 1.6 mi) Queensville, Ontario, Canada.

The Holland Marsh is a wetland and agricultural area in Ontario, Canada, about 50 kilometres (31 mi) north of Toronto. It lies entirely within the valley of the Holland River, stretching from the northern edge of the Oak Ridges Moraine near Schomberg to the river mouth at Cook's Bay, Lake Simcoe. In its entirety it comprises about 21,000 acres (8,500 hectares), with two distinct divisions. Historically it has simply been referred to as "the marsh". The first area to be drained and reclaimed for farming is a 7,200-acre (2,915-hectare) municipally drained polder south-west of the town of Bradford proper, of which 40% lies in King Township (York Region) and 60% in the town of Bradford West Gwillimbury (Simcoe County). The other 13,800 acres (5,585 hectares) lie north and east of Bradford, fringing Cook's Bay in the towns of Innisfil and East Gwillimbury. Portions of this area have been privately reclaimed for farming, such as the Ravenshoe Road and Bradford Marsh areas, and portions are recreational or undisturbed wetland. In some cases, recreational boating, wetland and agricultural areas intersect.

East Gwillimbury is a town (lower-tier municipality) on the East Holland River in the upper-tier municipality the Regional Municipality of York. It is part of the Greater Toronto Area of southern Ontario, in Canada. It was formed by the amalgamation of the Township of East Gwillimbury with all the previously incorporated villages and hamlets within the township. The main centres in East Gwillimbury are the villages of Holland Landing, Queensville, Sharon, and Mount Albert. The Civic Centre (municipal offices) are located along Leslie Street in Sharon. The northernmost interchange of Highway 404 is at the North edge of East Gwillimbury, just south of Ravenshoe Road. The hamlets of Holt and Brown Hill are also within town limits. East Gwillimbury takes its name from the family of Elizabeth Simcoe, née Gwillim, wife of Sir John Graves Simcoe, the first Lieutenant Governor of Ontario.

Gilford Aerodrome (TC LID: CGF6) is an aerodrome located adjacent to Gilford, Ontario, Canada.

Sharon (formerly Hope) is a former village now incorporated into the municipality of the Town of East Gwillimbury, Ontario, Canada, formerly the Township of East Gwillimbury. The municipal offices of the town are in Sharon. The community's most historic building is the Sharon Temple, once the meeting house of the Children of Peace (or Davidites). It is part of the musical, political, religious and architectural heritage of Ontario and is now a museum and National Historic Site of Canada. The museum hosts a number of concerts and educational programs, and has hosted the Words Alive Literary Festival since 2007. In the mid to late 1980s, housing developments were built in the area around Sharon. Further developments have continued slowly around Sharon since 2002.

York—Simcoe is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada from 1968 to 1979, from 1988 to 1997 and since 2004. It covers part of the region north of Toronto by Lake Simcoe. It has existed on three occasions. Its first incarnation was created in 1966 from parts of Dufferin—Simcoe and York North. It existed until 1976 when it was split between York North, Simcoe South, and York—Peel. It was reformed in 1987 from parts of Simcoe South, York—Peel, Victoria—Haliburton, and Wellington—Dufferin—Simcoe. It was again broken up in 1996 with a split between Barrie—Simcoe, Simcoe—Grey, and York North. Its current incarnation came into being in 2003 made up of parts of Simcoe—Grey, York North, and Barrie—Simcoe—Bradford. Its previous Member of Parliament was Peter Van Loan, the former Government House Leader. A by-election took place on February 25, 2019.