The value of all farms and ranches for sale in Harper County recently was almost $9 million, representing a combined 3,178 acres of land for sale in Harper County. Harper County ranks 70th in the state for the total acreage of land currently advertised for sale. Of all locations in Harper County with land for sale, Buffalo had the most land for sale. Agriculture and farming drives the Harper County economy, with 532 farms recorded in the county during the U.S. Census in 2012. Farming activities in Harper County generate annual revenues of $3 million, the majority of which comes from livestock products. Harper County is Oklahoma's 17th largest county (1,041 square miles). It's located in the Red Carpet Country Oklahoma region of the state.