Charlevoix /ˈʃɑrləvɔɪ/ is a city in the U.S. state of Michigan. The population was 2,513 at the 2010 census. It is the county seat of Charlevoix County.Charlevoix Township is a separate municipal entity that completely surrounds the city and has 1,697-year round population. Typical of Northern Michigan towns, Charlevoix has a significant seasonal tourist population in the summer.