There was a total of $223 million of farmsand rural real estate for sale in Columbia County recently on Land.com. The total size of all Columbia County farms, hunting land and other rural land and acreage for sale was around 6,000 acres. Columbia County ranks 22nd in the state for the combined amount of land currently advertised for sale. Among cities in Columbia County with farms, rural land, hunting land and other land for sale, Hudson featured the most land for sale. Based on its natural assets, Columbia County's economy is dependent on tourism and recreation. Columbia County is the 38th largest county (648 square miles) in New York. It's located in the Southern New York region of New York.