Oakland County, Michigan

Oakland County is a county in the U.S. state of Michigan. As of the 2020 census,  1,274,395 people lived there, making it the second-most populous county in Michigan, after neighboring Wayne County. The county seat is Pontiac. The county was created on March 28, 1820.

 References 

Category:1820 establishments in the United States
Category:1820s establishments in Michigan Territory
Category:Michigan counties