Land for sale in Porter County, Indiana, recently totaled around $119 million and around 2,000 acres. Porter County ranks fifth out of 92 counties in Indiana for the combined amount of land currently advertised for sale. Among cities in Porter County with land and rural real estate for sale, Valparaiso featured the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Porter County. Porter County is one of the ten largest counties in Indiana (521 square miles). It's located in the North Indiana region of the state.