The value of all farms, ranches, and rural real estate for sale in Colorado's Pitkin County recently was nearly $3 billion, representing a combined 10,320 acres of land for sale in Pitkin County. Pitkin County ranks 12th in the state for the combined amount of land currently advertised for sale. Of all locations in Pitkin County with farms and ranches for sale, Aspen had the most land for sale. Based on its natural assets, Pitkin County's economy is dependent on tourism and recreation. Pitkin County is the 44th largest county (973 square miles) in Colorado. It's located in the South Central Colorado region of the state.