A total of 3,000 acres were listed for sale in Caledonia County, Vermont, recently, representing a combined around $56 million in Caledonia County farms, rural land, hunting land and other land for sale. Caledonia County ranks fifth in the Green Mountain State for the combined amount of land currently advertised for sale. Of all farms and rural land for sale in Caledonia County, Saint Johnsbury had the most land for sale. Caledonia County is one of the ten biggest counties in Vermont (657 square miles). It's located in the North Vermont region of the state.