A combined around 4,000 acres were listed for sale in Vermont's Windham County recently; the combined value of all Windham County farmsand rural real estate for sale was approximately $179 million. Windham County ranks first in the Green Mountain State based on the total amount of acres of land for sale among all the counties in Vermont. Wilmington had the most land for sale. Based on its natural assets, tourism and recreation contribute significant revenue toward Windham County's overall GDP. Windham County is one of the ten biggest counties in Vermont (798 square miles). It's located in the South Vermont region of Vermont.