Resident Population in Gray County, KS was 5.73000 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Gray County, KS reached a record high of 6.08600 in January of 2011 and a record low of 4.40000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Gray County, KS - last updated from the United States Federal Reserve on April of 2026.