East Grand Rapids is a city in Kent County in the U.S. state of Michigan. As of the 2020 census, the population was 11,371. The city is part of …East Grand Rapids is a city in Kent County in the U.S. state of Michigan. As of the 2020 census, the population was 11,371. The city is part of the Grand Rapids metropolitan area, including Grand Rapids and Grand Rapids Township, but the city is administered autonomously.