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.

Metro Detroit is a major metropolitan area in the U.S. state of Michigan, consisting of the city of Detroit and over 200 municipalities in the surrounding area with its largest employer being Oakland County. There are varied definitions of the area, including the official statistical areas designated by the Office of Management and Budget, a federal agency of the United States.