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All Boulder County population data above are from the US Census Bureau.
The population data for Boulder County are from the Census' American Community Survey 2017 5-year estimates and the Census' 2018 Population Estimates. The demographic data for Jefferson County, Pueblo County, Summit County, and Weld County are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2017 5-year estimates, and were downloaded on 6 December 2018. Check out our FAQ section for more details.
With 326,078 people, Boulder County is the 8th most populated county in the state of Colorado out of 64 counties. But watch out, Boulder County, because Pueblo County with 167,529 people and Weld County with 314,305 people are right behind you.
The largest Boulder County racial/ethnic groups are White (78.2%) followed by Hispanic (13.8%) and Asian (4.5%).
In 2017, the median household income of Boulder County residents was $75,669. Boulder County households made slightly more than Jefferson County households ($75,170) and Summit County households ($73,538) . However, 13.1% of Boulder County residents live in poverty.
The median age for Boulder County residents is 36.2 years young.
86% of people CANNOT find the data they're looking for on the US Census Bureau website. Source: Nielsen Norman Group
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