Resident Population in Lake County, OH was 231.64000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Lake County, OH reached a record high of 235.34600 in January of 2009 and a record low of 197.20000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Lake County, OH - last updated from the United States Federal Reserve on May of 2024.