Resident Population in McPherson County, KS was 30.09100 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in McPherson County, KS reached a record high of 30.18000 in January of 2020 and a record low of 24.50000 in January of 1972. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in McPherson County, KS - last updated from the United States Federal Reserve on May of 2024.