Armstrong County is in Pittsburgh & Countryside Pennsylvania. Of the 67 counties in the Keystone State, Armstrong County is 34th in terms of its size (424,859 acres). Recent listings of farms for sale in Pennsylvania's Armstrong County totals nearly 1,000 acres and a combined market value of around $1 million. The most common type of land for sale by combined acreage in Armstrong County is residential property. The average price of farms for sale in Armstrong County was $111,890. Farms for sale in Armstrong County support 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 business or lifestyle needs.