Muskegon is a city in the U.S. state of Michigan, and is the largest populated city on the eastern shores of Lake Michigan. At the 2010 census the city population was 38,401. The city is the county seat of Muskegon County. It is located at the southwest corner of Muskegon Township, but is administratively autonomous.The Muskegon Metro area had a population of 172,188 in 2010. It is also part of the larger Grand Rapids-Wyoming-Muskegon-Combined Statistical Area with a population of 1,321,557.