Resident Population in Kosciusko County, IN was 80.66900 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Kosciusko County, IN reached a record high of 80.67600 in January of 2022 and a record low of 48.12700 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Kosciusko County, IN - last updated from the United States Federal Reserve on April of 2026.