Boulder County, Colorado
Boulder County profile, demographic data, and geographic information.
Cities & Towns in Boulder County
Constituent municipalities and census communities located within Boulder County.
| City / Town Name | Classification | Census GEOID | Land Area |
|---|---|---|---|
| Allenspark CDP | CDP | 0801420 | 11.94 sq mi |
| Altona CDP | CDP | 0801740 | 1.69 sq mi |
| Bar-K Ranch CDP | CDP | 0804620 | 0.86 sq mi |
| Bonanza Mountain Estates CDP | CDP | 0807580 | 0.17 sq mi |
| Boulder city | City | 0807850 | 26.97 sq mi |
| Crisman CDP | CDP | 0818585 | 1.46 sq mi |
| Eldora CDP | CDP | 0823575 | 4.16 sq mi |
| Eldorado Springs CDP | CDP | 0823630 | 2.58 sq mi |
| Erie town | Town | 0824950 | 21.51 sq mi |
| Glendale CDP | CDP | 0830350 | 1.26 sq mi |
| Gold Hill CDP | CDP | 0830945 | 2.08 sq mi |
| Gunbarrel CDP | CDP | 0833502 | 6.25 sq mi |
| Hidden Lake CDP | CDP | 0835860 | 0.61 sq mi |
| Jamestown town | Town | 0839195 | 0.57 sq mi |
| Lafayette city | City | 0841835 | 9.26 sq mi |
| Lazy Acres CDP | CDP | 0844270 | 5.29 sq mi |
| Leyner CDP | CDP | 0844695 | 0.20 sq mi |
| Longmont city | City | 0845970 | 29.28 sq mi |
| Louisville city | City | 0846355 | 7.98 sq mi |
| Lyons town | Town | 0847070 | 1.37 sq mi |
| Mountain Meadows CDP | CDP | 0852210 | 1.72 sq mi |
| Nederland town | Town | 0853175 | 1.48 sq mi |
| Niwot CDP | CDP | 0853780 | 4.00 sq mi |
| Paragon Estates CDP | CDP | 0857445 | 1.68 sq mi |
| Pine Brook Hill CDP | CDP | 0859240 | 3.03 sq mi |
| Seven Hills CDP | CDP | 0869110 | 0.49 sq mi |
| St. Ann Highlands CDP | CDP | 0867040 | 1.39 sq mi |
| Sugarloaf CDP | CDP | 0874980 | 2.18 sq mi |
| Sunshine CDP | CDP | 0875585 | 1.73 sq mi |
| Superior town | Town | 0875640 | 3.93 sq mi |
| Tall Timber CDP | CDP | 0876325 | 0.57 sq mi |
| Valmont CDP | CDP | 0880370 | 0.26 sq mi |
| Ward town | Town | 0882735 | 0.54 sq mi |