Boulder County Population 2017

Boulder County's estimated population is 322,226 with a growth rate of 1.09% 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
2016322,2263,4881.09%
2015318,7385,5341.77%
2014313,2042,9170.94%
2013310,2874,9371.62%
2012305,3504,7531.58%
2011300,5974,6141.56%
2010295,98370,64431.35%
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
White289,53689.85%
Asian14,4004.47%
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

0k5k10k15k20kBoulder County Male Population0k5k10k15k20kBoulder County Female Population

Population of Cities in Boulder County

City 2010 Census 2016 Estimated Growth Growth Rate
Boulder977301080901036010.60%
Longmont863089285865507.59%
Lafayette2443928261382215.64%
Erie1816422803463925.54%
Louisville1841020801239112.99%
Lyons203521481135.55%
Nederland14491534855.87%
Jamestown274273-1-0.36%
Ward15015664.00%
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