Niwot is a census-designated place in Boulder County, Colorado, United States. The population was 4,160 at the 2000 census. The Niwot Post Office has the ZIP Code 80544. This locality is named for Arapaho Chief Niwot, a tribal leader in the Boulder area during the nineteenth century. The name means "left-handed." With a per capita income of $39,943, Niwot is ranked as the 17th wealthiest location in Colorado. Niwot is located at 40°5′59″N 105°9′37″W / 40.09972°N 105.16028°W / 40.09972; -105.16028 . According to the United... States Census Bureau, the CDP has a total area of 4.1 square miles , all of it land. As of the census of 2000, there were 4,160 people, 1,502 households, and 1,094 families residing in the CDP. The population density was 1,026.4 people per square mile . There were 1,546 housing units at an average density of 381.4 per square mile . The racial makeup of the CDP was 94.52% White, 0.48% African American, 0.38% Native American, 2.16% Asian, 0.02% Pacific Islander, 1.06% from other races, and 1.37% from two or more races. Hispanic or Latino of any race were 3.39% of the population.
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| County: | Boulder County |
| State: | Colorado |
| Country: | United States of America |
| Population: | 4,160 |
| Area: | 4.1 sq. mi. |
| Time zone: | Mountain Time Zone |
| Also known as: | Niwot, Colorado, Boulder County / Niwot CDP |