is a county located in the U.S. state of Michigan.
As of the 2020 Census, the population was 23,431. The county seat is Bellaire. The name is taken from County Antrim in Northern Ireland.
The county was formed in 1840 as Meegisee County. Meegisee (meaning "eagle"), was the name of a Chippewa chief who signed the 1821 Treaty of Chicago and the 1826 Treaty of Mississinewas.(85 km2) (0.2%) is water.