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