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 |
|---|---|---|---|---|---|---|---|
| Milwaukee | 1 | 556,111 | 577,207 | -0.94% | 5,782 | 96.2 | City |
| West Bend | 2 | 31,946 | 31,706 | 0.19% | 2,051 | 15.6 | City |
| Mequon | 3 | 25,585 | 25,201 | 0.38% | 553 | 46.3 | City |
| Whitefish Bay | 4 | 14,426 | 14,934 | -0.87% | 6,821 | 2.1 | Village |
| Port Washington | 5 | 12,885 | 12,396 | 0.96% | 2,164 | 6.0 | City |
| Grafton | 6 | 12,782 | 12,084 | 1.38% | 2,440 | 5.2 | Village |
| Glendale | 7 | 12,777 | 13,343 | -1.1% | 2,217 | 5.8 | City |
| Cedarburg | 8 | 12,646 | 12,169 | 0.95% | 2,570 | 4.9 | City |
| Brown Deer | 9 | 12,540 | 12,592 | -0.1% | 2,853 | 4.4 | Village |
| Fox Point | 10 | 6,504 | 6,920 | -1.57% | 2,274 | 2.9 | Village |
| Bayside | 11 | 4,334 | 4,474 | -0.8% | 1,816 | 2.4 | Village |
| Saukville | 12 | 4,261 | 4,257 | 0.02% | 1,204 | 3.5 | Village |
| Thiensville | 13 | 3,284 | 3,284 | 0% | 3,164 | 1.0 | Village |
| Belgium | 14 | 2,517 | 2,428 | 0.88% | 1,171 | 2.1 | Village |
| Fredonia | 15 | 2,287 | 2,275 | 0.13% | 1,023 | 2.2 | Village |
| Cedar Grove | 16 | 2,111 | 2,098 | 0.14% | 967 | 2.2 | Village |
| Random Lake | 17 | 1,578 | 1,562 | 0.25% | 1,051 | 1.5 | Village |
| River Hills | 18 | 1,551 | 1,598 | -0.77% | 301 | 5.2 | Village |
| Newburg | 19 | 1,128 | 1,144 | -0.35% | 1,173 | 1.0 | Village |
| Waubeka | 20 | 506 | 624 | -2.13% | 207 | 2.5 | CDP |
| Adell | 21 | 488 | 499 | -0.61% | 875 | 0.6 | 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.
Milwaukee is the largest city in Ozaukee County.
Adell is the smallest city in Ozaukee County.
There are 21 cities in Ozaukee County, Wisconsin.