Boulder County Colorado Cities & Towns
County Seat: Boulder
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Cities
- Boulder
- Lafayette
- Longmont (partly in Weld County)
- Louisville
Towns
- Erie (partly in Weld County)
- Jamestown
- Lyons
- Nederland
- Superior (partly in Jefferson County)
- Town of Ward
Census-designated places
- Allenspark
- Coal Creek (partly in Gilpin County and Jefferson County)
- Eldora
- Eldorado Springs
- Gold Hill
- Gunbarrel
- Niwot
- Valmont
Unincorporated communities
- Caribou
- Hygiene
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