Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Frenchtown township | 1 | 21,700 | 21,616 | 0.04% | 520 | 41.7 | Township |
| Monroe | 2 | 19,968 | 20,451 | -0.6% | 2,207 | 9.0 | City |
| Monroe charter township | 3 | 14,347 | 14,383 | -0.1% | 850 | 16.9 | Township |
| Woodhaven | 4 | 12,444 | 12,902 | -0.92% | 1,948 | 6.4 | City |
| Berlin charter township | 5 | 9,892 | 9,889 | -0.28% | 309 | 32.0 | Township |
| Dundee township | 6 | 8,800 | 8,161 | 0.79% | 182 | 48.2 | Township |
| Ash township | 7 | 7,934 | 7,870 | 0.25% | 229 | 34.6 | Township |
| Dundee | 8 | 6,182 | 5,372 | 3.38% | 1,179 | 5.2 | Village |
| Raisinville township | 9 | 6,006 | 5,910 | 0.38% | 125 | 48.1 | Township |
| Milan | 10 | 5,989 | 6,067 | -0.33% | 1,722 | 3.5 | City |
| Ida township | 11 | 4,771 | 4,786 | -0.17% | 130 | 36.7 | Township |
| Whiteford township | 12 | 4,573 | 4,596 | -0.22% | 115 | 39.7 | Township |
| La Salle township | 13 | 4,540 | 4,640 | -0.59% | 171 | 26.6 | Township |
| Erie township | 14 | 4,250 | 4,304 | -0.33% | 178 | 23.9 | Township |
| Exeter township | 15 | 3,896 | 3,930 | -0.33% | 107 | 36.5 | Township |
| Summerfield township | 16 | 3,181 | 3,181 | 0.22% | 76 | 42.0 | Township |
| London township | 17 | 2,984 | 2,989 | 0.1% | 83 | 35.8 | Township |
| Carleton | 18 | 2,337 | 2,335 | 0% | 2,358 | 1.0 | Village |
| South Rockwood | 19 | 1,568 | 1,596 | -0.44% | 479 | 3.3 | Village |
| Milan township | 20 | 1,534 | 1,563 | -0.58% | 45 | 34.0 | Township |
| Luna Pier | 21 | 1,345 | 1,375 | -0.59% | 901 | 1.5 | City |
| Petersburg | 22 | 1,151 | 1,170 | -0.43% | 2,383 | 0.5 | City |
| Maybee | 23 | 534 | 546 | -0.56% | 290 | 1.8 | Village |
| Estral Beach | 24 | 409 | 419 | -0.73% | 930 | 0.4 | Village |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Frenchtown township is the largest city in Monroe County.
Estral Beach is the smallest city in Monroe County.
There are 24 cities in Monroe County, Michigan.