Resident Population in Clark County, KS was 1.84700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Clark County, KS reached a record high of 2.89600 in January of 1970 and a record low of 1.84700 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Clark County, KS - last updated from the United States Federal Reserve on May of 2024.