22 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Milwaukee | 1 | 556,718 | 577,157 | -0.61% | 5,789 | 96 | City |
| Racine | 2 | 78,004 | 78,163 | -0.03% | 5,042 | 15 | City |
| West Allis | 3 | 59,546 | 60,259 | -0.2% | 5,232 | 11 | City |
| Wauwatosa | 4 | 49,024 | 48,333 | 0.24% | 3,706 | 13 | City |
| Oak Creek | 5 | 39,222 | 36,674 | 1.1% | 1,379 | 28 | City |
| Greenfield | 6 | 36,979 | 37,738 | -0.34% | 3,207 | 12 | City |
| Franklin | 7 | 36,810 | 36,152 | 0.3% | 1,065 | 35 | City |
| Mount Pleasant | 8 | 28,398 | 27,755 | 0.38% | 838 | 34 | Village |
| South Milwaukee | 9 | 19,963 | 20,772 | -0.67% | 4,137 | 5 | City |
| Cudahy | 10 | 17,465 | 18,181 | -0.68% | 3,658 | 5 | City |
| Glendale | 11 | 14,873 | 13,397 | 1.68% | 2,580 | 6 | City |
| Whitefish Bay | 12 | 14,332 | 14,931 | -0.69% | 6,776 | 2 | Village |
| Greendale | 13 | 14,267 | 14,830 | -0.65% | 2,564 | 6 | Village |
| Shorewood | 14 | 13,365 | 13,833 | -0.58% | 8,406 | 2 | Village |
| Brown Deer | 15 | 12,534 | 12,513 | 0.03% | 2,852 | 4 | Village |
| St. Francis | 16 | 8,852 | 9,148 | -0.55% | 3,461 | 3 | City |
| Hales Corners | 17 | 7,792 | 7,713 | 0.17% | 2,441 | 3 | Village |
| Fox Point | 18 | 6,426 | 6,921 | -1.26% | 2,247 | 3 | Village |
| Bayside | 19 | 4,279 | 4,455 | -0.67% | 1,793 | 2 | Village |
| West Milwaukee | 20 | 3,940 | 4,110 | -0.71% | 3,521 | 1 | Village |
| Yorkville | 21 | 3,247 | 3,246 | 0% | 97 | 33 | Village |
| River Hills | 22 | 1,514 | 1,594 | -0.85% | 294 | 5 | Village |
Milwaukee is the largest city in Milwaukee County, with a population of 556,718.
River Hills is the smallest city in Milwaukee County, with a population of 1,514.
There are 22 cities in Milwaukee County, Wisconsin.