Prairie Grove is a city located in the U.S. state of Arkansas. It is within Washington County included in the Northwest Arkansas region. Prairie Grove was incorporated in 1888. It has a total area of 9.33 square miles at 35°58′37″N 94°18′58″W. The elevation is 1,165 feet above sea level. As of the 2010 census data, it had a total population of 4,380. The population density was 575.81/sq mi. Prairie Grove School District serves education in the city which is divided into three different schools; Prairie Grove Elementary, Middle, and High School facilities. It has Zip code 72753.