Musselman Lake is a community settled adjacent to a 123-acre (0.50 km2) kettle lake of the same name in the town of Whitchurch-Stouffville, Ontario, Canada. It is located about 6 km north-northwest of urban Stouffville, and is part of the Greater Toronto Area.
It is accessible from Highway 48, which links Toronto to Beaverton. Highway 404, a limited-access 400-Series Highway 9 km west of Musselman Lake and which first opened in the early 1980s, is reached by Aurora Road. Located just south of Musselman Lake on the west side of Ninth Line is Windsor Lake, a much smaller kettle lake. The main streets are Vandorf Sideroad to the north, and Bloomington Road to the south. Musselman Lake feeds a small tributary to the East Holland River, which flows to the west.
Musselman Lake is part of the Oak Ridges Moraine, with much of the area forested and the moraine dividing the Lake Ontario and Lake Simcoe basins itself divided at Musselman Lake. Residential areas are around the two lakes and on a few other large lots within Musselman Lake. Pine trees dominate much of the area along with a couple of hills. Farmland covers the rest of the northeastern portion of Whitchurch-Stouffville. Creeks and streams are also characteristic of the area. Sand and gravel mining is widespread to the south and east of Musselman Lake. Musselman Lake has several mining areas and quarries. The mining industry began in the 1950s and continues through the present. In the early 2000s, a building whose construction was already under way had it halted for good to protect the moraine. In 2009 the Musselman’s Lake Subwatershed Assessment and Stewardship Opportunities Report was recognized that the water quality of the lake was “impaired” and “degraded,” and had declined since 1989 when similar study had been done.
Musselman Lake is situated near the eastern boundary of the town of Whitchurch-Stouffville. Neighbouring communities within Whitchurch-Stouffville include Ballantrae to the north-east and Bloomington to the south. Goodwood, a community of the town of Uxbridge, lies to the east.
The area was first settled 1807 by Peter and Jacob Musselman, Mennonites from Pennsylvania.
In the 1950s and 1960s housing developments was built around Musselman Lake.
A significant issue facing the Musselman Lake community in the coming years is the federal government’s proposed development of an international airport immediately south-east of Whitchurch-Stouffville (the Pickering Airport lands); under the current plan, an approach for one of the three landing strips would be directly above the communities of Ballantrae and Musselman Lake, with planes descending (or ascending) from 500 to 450 metres. The plan calls for 11.9 million passengers per year (or 32,600 per day) by 2032.