City | Rank | 2026 Pop.↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Milwaukee | 1 | 558,949 | 577,151 | -0.61% | 5,812 | 96 | City |
| West Allis | 2 | 59,994 | 60,258 | -0.21% | 5,271 | 11 | City |
| Wauwatosa | 3 | 48,757 | 48,332 | 0.22% | 3,686 | 13 | City |
| Oak Creek | 4 | 38,710 | 36,673 | 1.08% | 1,361 | 28 | City |
| Greenfield | 5 | 37,029 | 37,738 | -0.35% | 3,211 | 12 | City |
| Franklin | 6 | 36,788 | 36,154 | 0.28% | 1,064 | 35 | City |
| Mount Pleasant | 7 | 28,351 | 27,769 | 0.35% | 837 | 34 | Village |
| South Milwaukee | 8 | 20,053 | 20,773 | -0.68% | 4,155 | 5 | City |
| Cudahy | 9 | 17,534 | 18,178 | -0.69% | 3,673 | 5 | City |
| Glendale | 10 | 15,037 | 13,397 | 1.64% | 2,609 | 6 | City |
| Whitefish Bay | 11 | 14,387 | 14,933 | -0.7% | 6,802 | 2 | Village |
| Greendale | 12 | 14,331 | 14,835 | -0.66% | 2,575 | 6 | Village |
| Shorewood | 13 | 13,393 | 13,833 | -0.6% | 8,423 | 2 | Village |
| Brown Deer | 14 | 12,823 | 12,513 | 0.02% | 2,918 | 4 | Village |
| St. Francis | 15 | 8,904 | 9,148 | -0.57% | 3,481 | 3 | City |
| Hales Corners | 16 | 7,752 | 7,707 | 0.16% | 2,429 | 3 | Village |
| Fox Point | 17 | 6,500 | 6,921 | -1.26% | 2,273 | 3 | Village |
| Bayside | 18 | 4,301 | 4,456 | -0.69% | 1,803 | 2 | Village |
| West Milwaukee | 19 | 3,955 | 4,110 | -0.73% | 3,534 | 1 | Village |
| Yorkville | 20 | 3,252 | 3,250 | -0.03% | 97 | 33 | Village |
| River Hills | 21 | 1,541 | 1,598 | -0.9% | 299 | 5 | Village |
Milwaukee is the largest city in Milwaukee County, with a population of 558,949.
River Hills is the smallest city in Milwaukee County, with a population of 1,541.
There are 21 cities in Milwaukee County, Wisconsin.