Land for sale in Maine's Kennebec County recently totaled $92 million and approximately 3,000 acres. Kennebec County ranks eighth in the state for the total acreage of land currently advertised for sale. Of all locations in Kennebec County with land and rural real estate for sale, Augusta featured the most land for sale. Government and state-level services are the main economic drivers in Kennebec County. Kennebec County is Maine's 12th biggest county (951 square miles). It's located in the Southwest Maine region of the state.