00 Blank U.S. Census Bureau 03 City and Borough (suffix) U.S. Census Bureau 04 Borough (suffix) U.S. Census Bureau 05 County (suffix) U.S. Census Bureau 06 County (suffix) U.S. Census Bureau 07 District (suffix) U.S. Census Bureau 10 Island (suffix) U.S. Census Bureau 12 Municipality (suffix) U.S. Census Bureau 13 Municipio (suffix) U.S. Census Bureau 15 Parish (suffix) U.S. Census Bureau 21 borough (suffix) U.S. Census Bureau 25 city (suffix) U.S. Census Bureau 37 municipality (suffix) U.S. Census Bureau 43 town (suffix) U.S. Census Bureau 44 township (suffix) U.S. Census Bureau 47 village (suffix) U.S. Census Bureau 49 charter township (suffix) U.S. Census Bureau 53 city and borough (suffix) U.S. Census Bureau 57 census designated place (CDP) (suffix) U.S. Census Bureau CG consolidated government U.S. Census Bureau CN corporation (suffix) U.S. Census Bureau M1 Metro Area (suffix) U.S. Census Bureau M2 Micro Area (suffix) U.S. Census Bureau M3 Metro Division (suffix) U.S. Census Bureau MG metropolitan government U.S. Census Bureau MO CSA (suffix) U.S. Census Bureau MT metro government U.S. Census Bureau PR Planning Region (suffix) U.S. Census Bureau UC urban county (suffix) U.S. Census Bureau UG unified government U.S. Census Bureau