Resident Population in Rock County, MN was 9.55100 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Rock County, MN reached a record high of 11.40000 in January of 1971 and a record low of 9.33400 in January of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Rock County, MN - last updated from the United States Federal Reserve on May of 2024.