Ottawa County, MI (WGHN) – The US Census Bureau recently released the 2025 county population estimates. With a population of 308,459, Ottawa County saw an increase of 2,269 people from 2024. This gain results from an estimated natural increase of 674 people and a positive net migration of 1,569 people. Since 2020, Ottawa County has seen a total increase of 11,566 people, staying the 7th largest county in Michigan.

Ottawa County saw an increase of 3.90% from 2020 to 2025, making it the 10th fastest growing county in Michigan across that period. Among the ten largest counties in the state by population, Ottawa County experienced the most growth in that time. Of those largest counties, Kent County and Livingston County saw the 2nd and 3rd most growth, growing 2.54% and 1.72% respectively.

Additional information on Ottawa County’s population is available from the Department of Strategic Impact’s County Statistics page, including additional population tables and graphs. The 2025 population estimates for local townships, villages, and cities will be available from the Census Bureau later this year.

Looking for more?

Population data for the entire state is available on the US Census Bureau’s website.

If you enjoy digging into similar data and reports, find more from Ottawa County’s Department of Strategic Impact.