Prairie du Chien, WI

ZIP code 53821 covers Lancaster, the county seat of Grant County in southwestern Wisconsin, along with nearby rural areas. Its prominent landmarks include the 1902 Grant County Courthouse, a listed historic building; Lancaster’s oversized “Big Apple” monument, reflecting the area’s apple-growing identity; and the Grant County Historical Society Museum, which presents local history. The area also features farmland and a small-town civic and commercial district.