Mifflin County is in Alleghenies & Valleys Pennsylvania. Of the 67 counties in the Keystone State, Mifflin County is 54th in terms of its size (265,418 acres). The total value of nearly 1,000 acres of residential land and property recently listed for sale in Pennsylvania's Mifflin County was around $5 million. The average price of residential acreage for sale in Mifflin County was $290,852. Browse all residential land and rural property for sale in Pennsylvania to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.