Land for sale in Fulton County recently totaled $5 million and nearly 1,000 acres. Fulton County ranks 87th in the Hoosier?State for the total acreage of land currently advertised for sale. Of all farms and rural real estate for sale in Fulton County, Rochester had the most land for sale. Manufacturing and related services are the largest economic sectors in Fulton County. Fulton County is Indiana's 65th largest county (371 square miles). It's located in the North Indiana region of Indiana.