Resident Population in Fulton County, IN was 20.00400 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Fulton County, IN reached a record high of 20.81800 in January of 2010 and a record low of 16.98400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Fulton County, IN - last updated from the United States Federal Reserve on April of 2026.