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