Land for sale in Kansas's Thomas County recently totaled around $5 million and 1,000 acres. Thomas County ranks 86th in Kansas for the total acreage of land currently advertised for sale. There were two properties listed as sold in Thomas County through the Land Network Comparable Sales Program. This represented a total value of $460,000. Of all farms and ranches for sale in Thomas County, Colby featured the most land for sale. Thomas County is one of the ten largest counties in Kansas (1,074 square miles). It's located in the High Plains Kansas region of the state.