Of 67 counties in the Independence State, Armstrong County ranks 34th by size (663 square miles). Armstrong County is in Pittsburgh & Countryside Pennsylvania. A recent survey of Land Network data totals roughly 1,000 acres of ranches for sale in Pennsylvania's Armstrong County, which is valued at a combined $2 million. Browse all Armstrong County ranches for sale on the Land Network to find the ranch that's right for your business or commercial needs, from the sprawling legacy ranch to unbelievable residential ranch for your second home, investment property or retirement nest egg. The most common type of land for sale by combined acreage in Armstrong County is house.