Resident Population in Mecosta County, MI was 41.09900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Mecosta County, MI reached a record high of 43.58300 in January of 2019 and a record low of 27.99200 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Mecosta County, MI - last updated from the United States Federal Reserve on May of 2024.