The value of all farms and ranches for sale in Smith County recently was nearly $6 million, representing a combined 969 acres of land for sale in Smith County. Smith County ranks 65th in the state for the combined amount of land currently advertised for sale. Smith Center featured the most land for sale. Smith County has a large agricultural economy, with 497 farms recorded in the county during the latest U.S. Census. Farming activities in Smith County generate annual revenues of $13 million, most of which is from crops. Smith County is the 31st biggest county (896 square miles) in Kansas. It's located in the Tallgrass Prairie Kansas region of Kansas.