| Zip Code | Primary City | Secondary City | | 48134 | Flat Rock | Brownstown, Township, Twp, Brownstwn Twp | | 48164 | New Boston | Brownstown, Huron Twp, Waltz, Willow, Township, Twp, Brownstwn Twp | | 48173 | Rockwood | Brownstown, Twp, Gibraltar, Township, Brownstwn Twp | | 48174 | Romulus | Brownstown, Township, Twp, Brownstwn Twp | | 48183 | Trenton | Brownstown, Woodhaven, Township, Twp, Brownstwn Twp | | 48193 | Riverview | Brownstown, Wyandotte, Township, Twp, Brownstwn Twp |
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