Onaway is a city in Presque Isle County, just east of the Cheboygan–Presque Isle county line in the U.S. state of Michigan. The population was 880 at the 2010 census. Onaway is the Sturgeon Capital of Michigan, and there is a lake sturgeon streamside rearing facility on the nearby Black River, where the fish migrate down to the Cheboygan River and then to Lake Huron.

Presque Isle County is a county in the Lower Peninsula of the U.S. state of Michigan. As of the 2020 census, the population was 12,982. The county seat is Rogers City. The county was authorized by state legislative action on April 1, 1840, but the county government was not established until 1871. The government was reorganized in 1875.