Ortonville is a village in north Oakland County in the U.S. state of Michigan. The village is within Brandon Township, although some development near the village lies within adjacent Oakland County, Groveland township and Lapeer County, Hadley township. The population was 1,291 as of the 2021 Census estimate. Ortonville lies on the northern edge of Metro Detroit and is approximately 41 miles north of Downtown Detroit.

Oakland County is a county in the U.S. state of Michigan. It is a principal county of the Detroit metropolitan area, containing the bulk of Detroit's northern suburbs. Due to the county's government complex spanning 2 municipalities, its county seat is shared between Pontiac and Waterford. Its largest city is Troy. As of the 2020 Census, its population was 1,274,395, making it the second-most populous county in Michigan, and the largest county in the United States without a city of 100,000 residents.