Resident Population in Sedgwick County, CO was 2.25700 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Sedgwick County, CO reached a record high of 3.40500 in January of 1970 and a record low of 2.25700 in January of 2024. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Sedgwick County, CO - last updated from the United States Federal Reserve on April of 2026.