Armstrong County is in Pittsburgh & Countryside Pennsylvania. Of the 67 counties in the Keystone State, Armstrong County is 34th in terms of its size (663 square miles). Armstrong County, Pennsylvania, includes nearly 1,000 acres of farms for sale based on recent Land Network data. The combined market value of farms, hunting land and other rural land and acreage for sale here was about $2 million. The average price of farms for sale in Armstrong County was $286,857. Farms for sale in Armstrong County sustain livestock including horses, cattle, pig, sheep and goats. Browse all Pennsylvania farms for sale on the Land Network to find the farm, cattle operation, hobby farm or other farm property that's right for your future commercial or individual needs.