Resident Population in Cass County, ND was 196.36200 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Cass County, ND reached a record high of 196.36200 in January of 2023 and a record low of 73.65300 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Cass County, ND - last updated from the United States Federal Reserve on May of 2024.