Resident Population in Doniphan County, KS was 7.57500 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Doniphan County, KS reached a record high of 9.50000 in January of 1972 and a record low of 7.45500 in January of 2021. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Doniphan County, KS - last updated from the United States Federal Reserve on April of 2026.