Pea Ridge is a city in Benton County, Arkansas, United States. The name Pea Ridge is derived from a combination of the physical location of th…Pea Ridge is a city in Benton County, Arkansas, United States. The name Pea Ridge is derived from a combination of the physical location of the original settlement of the town, across the crest of a ridge of the Ozark Mountains, 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.