The United States Postal Service's official names for the cities in which ZIP codes are contained. This vector contains unique values, sorted alphabetically; because of this, they do not line up the other vectors in the way zip.code and zip.center do.
city.nameA character vector of length 19108.
Daniel Coven's web site and the CivicSpace US ZIP Code Database written by Schuyler Erle schuyler@geocoder.us, 5 August 2004.