Boulder County Population 2018

Boulder County's estimated population is 322,514 with a growth rate of 0.42% in the past year according to the most recent United States census data. Boulder County is the 8th largest county in Colorado.

Year Population Growth Growth Rate
2017322,5141,3410.42%
2016321,1733,2051.01%
2015317,9685,4631.75%
2014312,5052,7560.89%
2013309,7494,7211.55%
2012305,0284,5101.50%
2011300,5184,5881.55%
2010295,93070,59131.33%
1990225,33935,71418.83%
1980189,62557,73643.78%
1970131,88957,63577.62%
196074,25425,95853.75%
195048,29610,85829.00%
194037,4384,98215.35%
193032,4565951.87%
192031,8611,5315.05%
191030,3308,78640.78%
190021,5447,46252.99%
189014,0824,35944.83%
18809,7237,784401.44%
18701,9390.00%

Boulder County Population Growth

Population Data via

Boulder County Race Data

Race Population Percentage
White289,53689.77%
Asian14,4004.46%
Two or More Races8,3462.59%
Black or African American3,5051.09%
American Indian and Alaska Native2,6960.84%
Native Hawaiian and Other Pacific Islander2550.08%

Boulder County Population Pyramid

0k5k10k15k20k Male Population0k5k10k15k20k Female Population8580757065605550454035302520151050
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990