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). Recent Land Network data records roughly 1,000 acres of farms for sale in Pennsylvania's Armstrong County, which is valued at a combined $1 million. The average price of farms for sale in Armstrong County was $111,316. Farms for sale in Armstrong County sustain livestock including horses, cattle, sheep, pig 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 lifestyle needs.