This feature class contains polygons defining the USPS ZIP Codes in Hillsborough County, Florida. The dataset includes a five-digit code and name of each ZIP code. The purpose of this dataset is to represent location and describe the boundaries of all ZIP codes within Hillsborough County.USPS ZIP code layer were originally built using the street centerline, Situs or property lines.Hillsborough County obtains the information about approximate ZIP codes boundaries in the form of legal descriptions or general maps outlining the areas from USPS and feature polygons are drawn using ArcMap to update the existing boundaries. Any ZIP code that did not have geographic areas but have only post office box was represented by a small square. The boundaries are updated as needed basis when errors are found or when unpopulated areas have growth. The polygon boundaries are approximate since the ZIP codes are assigned to linear features (Roads), not to geographic areas.