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is a city in Benton County, Arkansas, United States. The name Pea Ridge comes from a combination of the the physical location of the original settlement of the town, across the crest of an Ozark Mountains ridge, and for the hog peanuts or turkey peas that had been originally cultivated by Native American tribes centuries before European settlement, which later helped to provide basic subsistence once those pioneer settlers arrived. The rural town is best known as the location of the pivotal American Civil War engagement the Battle of Pea Ridge, or, as it is locally known, the Battle of Elkhorn Tavern, which took place approximately five miles east of the town. The site of the battle is preserved as the Pea Ridge National Military Park. The town's downtown business district is on the National Register of Historic Places and largely comprises commercial structures from the late 19th and early 20th centuries. The population was 2,346 at the 2000 census. It is part of the Fayetteville–Springdale–Rogers, AR-MO Metropolitan Statistical Area.
According to the United States Census Bureau, the city has a total area of 4.1 square miles (10.6 km²), all of it land.