There are 47 cities in Jefferson County, Colorado.
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 Population | 2020 Population | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Denver | 1 | 716,234 | 717,606 | -0.05% | 4,679 | 153.1 | City |
| Lakewood | 2 | 155,865 | 156,247 | -0.06% | 3,587 | 43.5 | City |
| Arvada | 3 | 120,437 | 124,343 | -0.8% | 3,090 | 39.0 | City |
| Westminster | 4 | 114,302 | 116,594 | -0.5% | 3,615 | 31.6 | City |
| Highlands Ranch | 5 | 102,314 | 107,017 | 0.39% | 4,216 | 24.3 | CDP |
| Broomfield | 6 | 77,650 | 74,490 | 1.03% | 2,355 | 33.0 | City |
| Littleton | 7 | 44,069 | 45,595 | -0.86% | 3,492 | 12.6 | City |
| Dakota Ridge | 8 | 34,606 | 34,655 | 0.54% | 3,685 | 9.4 | CDP |
| Ken Caryl | 9 | 33,683 | 33,815 | 0.27% | 3,426 | 9.8 | CDP |
| Wheat Ridge | 10 | 31,612 | 32,379 | -0.6% | 3,383 | 9.3 | City |
| Lafayette | 11 | 30,441 | 30,433 | 0.01% | 3,298 | 9.2 | City |
| Columbine | 12 | 26,217 | 25,892 | 0.53% | 3,952 | 6.6 | CDP |
| Golden | 13 | 20,191 | 20,394 | -0.25% | 2,096 | 9.6 | City |
| Louisville | 14 | 20,128 | 21,174 | -1.29% | 2,525 | 8.0 | City |
| Sherrelwood | 15 | 19,415 | 19,082 | 0.41% | 7,915 | 2.5 | CDP |
| Superior | 16 | 13,446 | 13,106 | 0.64% | 3,419 | 3.9 | Town |
| Berkley | 17 | 11,181 | 11,299 | -0.02% | 3,108 | 3.6 | CDP |
| Fairmount | 18 | 10,871 | 9,549 | 2.22% | 1,788 | 6.1 | CDP |
| Roxborough Park | 19 | 9,050 | 9,004 | -0.04% | 980 | 9.2 | CDP |
| Evergreen | 20 | 8,961 | 9,475 | -0.06% | 778 | 11.5 | CDP |
| Applewood | 21 | 8,122 | 8,300 | 0.84% | 1,998 | 4.1 | CDP |
| Shaw Heights | 22 | 5,515 | 5,987 | 0.53% | 8,158 | 0.7 | CDP |
| West Pleasant View | 23 | 5,423 | 5,417 | 2.13% | 3,515 | 1.5 | CDP |
| Edgewater | 24 | 4,841 | 5,005 | -0.84% | 6,965 | 0.7 | City |
| Genesee | 25 | 4,119 | 4,099 | 0.91% | 622 | 6.6 | CDP |
| Coal Creek | 26 | 2,436 | 2,605 | 0.08% | 259 | 9.4 | CDP |
| Sterling Ranch | 27 | 2,217 | 521 | 7.73% | 401 | 5.5 | CDP |
| Columbine Valley | 28 | 1,735 | 1,502 | 3.46% | 1,767 | 1.0 | Town |
| Perry Park | 29 | 1,723 | 1,821 | 0.29% | 201 | 8.6 | CDP |
| Indian Hills | 30 | 1,472 | 1,363 | 0.89% | 271 | 5.4 | CDP |
| Aspen Park | 31 | 1,027 | 1,045 | 1.08% | 417 | 2.5 | CDP |
| Kittredge | 32 | 974 | 954 | -2.31% | 517 | 1.9 | CDP |
| Upper Bear Creek | 33 | 898 | 799 | -1.32% | 237 | 3.8 | CDP |
| Floyd Hill | 34 | 832 | 824 | -1.42% | 132 | 6.3 | CDP |
| Bow Mar | 35 | 813 | 852 | -1.21% | 1,228 | 0.7 | Town |
| Upper Witter Gulch | 36 | 713 | 725 | 7.7% | 783 | 0.9 | CDP |
| Brook Forest | 37 | 624 | 479 | 7.59% | 449 | 1.4 | CDP |
| Pine Valley | 38 | 614 | 343 | 7.72% | 746 | 0.8 | CDP |
| Mountain View | 39 | 513 | 537 | -1.16% | 5,516 | 0.1 | Town |
| Echo Hills | 40 | 422 | 414 | 7.65% | 743 | 0.6 | CDP |
| Morrison | 41 | 384 | 398 | -1.03% | 233 | 1.6 | Town |
| Idledale | 42 | 342 | 292 | 2.09% | 1,235 | 0.3 | CDP |
| Westcreek | 43 | 306 | 273 | 4.08% | 252 | 1.2 | CDP |
| Louviers | 44 | 266 | 381 | 0% | 168 | 1.6 | CDP |
| East Pleasant View | 45 | 97 | 128 | -16.38% | 874 | 0.1 | CDP |
| Lakeside | 46 | 15 | 17 | -6.25% | 80 | 0.2 | Town |
| Sedalia | 47 | 10 | 103 | -58.33% | 7 | 1.4 | CDP |
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.
Denver is the largest city in Jefferson County.
Sedalia is the smallest city in Jefferson County.
There are 47 cities in Jefferson County, Colorado.