The value of all land for sale in Minnesota's Saint Louis County recently was around $181 million, representing a total of 14,213 acres of land for sale in Saint Louis County. Saint Louis County ranks second based on the total amount of acres of land for sale among the 87 counties in Minnesota. Among cities in Saint Louis County with land and rural real estate for sale, Duluth had the most land for sale. Saint Louis County is the largest county in Minnesota (6,859 square miles). It's located in the Northeast Minnesota region of Minnesota.