Pea Ridge is a city located in the U.S. state of Arkansas. It is within Benton County which derived its name from a combination of the physical location of the original settlement of the town along the crest of an Ozark ridge, and for the hog peanuts farmed by Native American tribes. It coordinates at 36°26′52″N 94°7′0″W. The elevation is 1,289 feet above sea level. As of the 2010 census data, it had a total population of 4,794. The population density was 732.34/sq mi. Estimated per capita income in 2015 was $22,042. It has Zip code 72751.