Grimes County is a county in Texas. It covers 801 square miles (512,813 acres), which represents zero percent of the state total. Of the 254 counties in Texas, Grimes County ranks 97th in terms of the size of its population (27,512, according to 2015 Census estimates). Manufacturing and related services provide the main economic inputs to Grimes County. Recent Lands of America data places the average value of ranches, land, farms and other recreational acreage for sale in Grimes County at $8,686 per acre. The average listing price was $611,519 (the most expensive listing being for $11.3 million) and the median size of land and property for sale in Grimes County was 21 acres. Land for sale in Grimes County totaled 13,236 acres and $115.0 million in overall land value, with the city of Navasota featuring the most land for sale in the county. Farmland was the most common type of land for sale in Grimes County.