Oscoda County is a county in the U.S. state of Michigan. As of the 2020 census, the population was 8,219, making it the least populous county in the Lower Peninsula, and the sixth-least populous county in the entire state. The county seat is Mio, an unincorporated community near the center of the county.

Henry Rowe Schoolcraft was an American geographer, geologist, and ethnologist, noted for his early studies of Native American cultures, as well as for his 1832 expedition to the source of the Mississippi River. He is also noted for his major six-volume study of Native Americans commissioned by Congress and published in the 1850s.