531
- 53103 Big Bend
- 53104 Bristol
- 53105 Burlington
- 53108 Caledonia
- 53110 Cudahy
- 53114 Darien
- 53115 Delavan
- 53118 Dousman
- 53119 Eagle
- 53120 East Troy
- 53121 Elkhorn
- 53122 Elm Grove
- 53125 Fontana
- 53126 Caledonia
- 53128 Genoa City
- 53129 Greendale
- 53130 Hales Corners
- 53132 Franklin
- 53137 Helenville
- 53139 Kansasville
- 53140 Kenosha
- 53142 Kenosha
- 53143 Kenosha
- 53144 Kenosha
- 53146 New Berlin
- 53147 Lake Geneva
- 53149 Mukwonago
- 53150 Muskego
- 53151 New Berlin
- 53153 North Prairie
- 53154 Oak Creek
- 53156 Palmyra
- 53158 Pleasant Prairie
- 53167 Rochester
- 53168 Salem
- 53170 Silver Lake
- 53172 South Milwaukee
- 53177 Sturtevant
- 53178 Sullivan
- 53179 Trevor
- 53181 Twin Lakes
- 53182 Union Grove
- 53183 Wales
- 53184 Walworth
- 53185 Waterford
- 53186 Waukesha
- 53188 Waukesha
- 53189 Waukesha
- 53190 Whitewater
- 53191 Williams Bay
- 53192 Wilmot
- 53195 Zenda