18 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Raymore | 1 | 27,432 | 23,021 | 2.75% | 1,585 | 17 | City |
| Belton | 2 | 26,772 | 24,038 | 1.73% | 1,857 | 14 | City |
| Harrisonville | 3 | 9,903 | 10,133 | -0.38% | 885 | 11 | City |
| Pleasant Hill | 4 | 8,899 | 8,793 | 0.2% | 1,108 | 8 | City |
| Peculiar | 5 | 6,509 | 5,659 | 2.23% | 718 | 9 | City |
| Lake Winnebago | 6 | 1,937 | 1,465 | 4.25% | 835 | 2 | City |
| Garden City | 7 | 1,582 | 1,633 | -0.5% | 640 | 2 | City |
| Archie | 8 | 1,282 | 1,272 | 0.16% | 854 | 2 | City |
| Loch Lloyd | 9 | 1,110 | 870 | 3.74% | 638 | 2 | Village |
| Cleveland | 10 | 640 | 649 | -0.16% | 431 | 1 | City |
| Freeman | 11 | 506 | 478 | 1% | 589 | 1 | City |
| East Lynne | 12 | 306 | 294 | 0.66% | 939 | 0 | City |
| Strasburg | 13 | 119 | 106 | 1.71% | 613 | 0 | City |
| West Line | 14 | 116 | 124 | -0.85% | 256 | 0 | Village |
| Lake Annette | 15 | 113 | 107 | 0.89% | 724 | 0 | City |
| Baldwin Park | 16 | 83 | 82 | 0% | 1,092 | 0 | Village |
| Gunn City | 17 | 79 | 79 | 0% | 975 | 0 | Village |
| Riverview Estates | 18 | 78 | 78 | 0% | 325 | 0 | Village |
Raymore is the largest city in Cass County, with a population of 27,432.
Riverview Estates is the smallest city in Cass County, with a population of 78.
There are 18 cities in Cass County, Missouri.