A total of around 2,000 acres were listed for sale in Armstrong County, Pennsylvania, recently, representing a total value of almost $21 million in Armstrong County land and rural real estate for sale. Armstrong County ranks 53rd in the Keystone State for the total number of acres of land currently advertised for sale. Of all locations in Armstrong County with farms, hunting land and other rural land and acreage for sale, Kittanning featured the most land for sale. Economically speaking, Armstrong County's is largely dependent on mining and mineral extraction-related businesses and services. Armstrong County is the 34th biggest county (663 square miles) in Pennsylvania. It's located in the Pittsburgh & Countryside Pennsylvania region of the state.