The Hampton Double Square Historic District is a historic district located in Hampton, Iowa, United States. The town of Hampton was laid out by H.P. Allen, who was the county surveyor, in June 1856. The original plat was eight blocks by eight blocks in the shape of an “L”. Near the center of the “L” was the two-block, or double, square. While many county seats in Iowa have a courthouse square, the double square is a rarity.