Resident Population in Grant County, KS was 7.14700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Grant County, KS reached a record high of 8.09100 in January of 1998 and a record low of 5.96100 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Grant County, KS - last updated from the United States Federal Reserve on May of 2024.