The combined value of land for sale in Kent County, Delaware, recently on Land.com was almost $144 million. This represents approximately 1,000 acres of farms and rural real estate for sale in Kent County. Kent County ranks second in the state based on the combined acreage of land for sale among all the counties in the "Small Wonder. Of all land and rural real estate for sale in Kent County, Dover had the most land for sale. Kent County is one of the ten largest counties in Delaware (798 square miles). It's located in the Central Delaware region of the state.