Grand Haven is a city within the U.S. state of Michigan and the county seat of Ottawa County. Grand Haven is located on the eastern shore of Lake Michigan at the mouth of the Grand River, for which it is named. As of the 2020 census, Grand Haven had a population of 11,011. It is located in the northern portion of Grand Haven Charter Township, but is administratively autonomous. The city is home to the Grand Haven Memorial Airpark (3GM). Grand Haven's ZIP code also serves most of Grand Haven and Robinson townships.