This polygon shapefile represents the five-digit U.S. ZIP Code areas as points, plus all ZIP Codes that have no associated area such as a building. This data includes populations. U.S. ZIP Code Points provides the postal name, types, population, and area for the ZIP Code locations in the United States. ESRI; TomTom North America, Inc.; . (2014). U.S. ZIP Code Points. Available at: http://purl.stanford.edu/rp136kg4370