Resident Population in Porter County, IN was 175.86000 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Porter County, IN reached a record high of 175.86000 in January of 2024 and a record low of 87.11400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Porter County, IN - last updated from the United States Federal Reserve on April of 2026.