Boulder County is a county in the U.S. state of Colorado, CO with an estimated population of 326,078 as of July 1, 2018 and is thus ranked 281 in the United States.
In contrast to the 2010 census, the population of Boulder County was still 294,561. This means that the 2018 population percent change from 2010 population of Boulder County has risen by 10.7%.
Boulder County is formed in 1861-11-01 and covers an total area of 740.37 square miles. This area is divided into 726.29 square miles land area and 14.08 square miles water area. Density per square kilometre of land area are 405.6 of population in 175.0 housing units.
There were 127,071 housing units in the whole of Boulder County for the 2010 census with 119.300 total households, 68.891 of them family households. At the 1990 census, the population of Boulder County was still 225,339. 2011 population percent change from 1990 population of Boulder County was still 30,72 %, or expressed in detail 69.228 inhabitants. 2017 ACS Population - High School Diploma or more as a percent of 2017 ACS Population - Population 25 and over was 94.6% (percent) and is ranked number 134 of all counties in the United States.
Labor Force 2018 in Boulder County was 193,822 and is ranked number 177, with a Unemployment Rate 2018 of 2.8 % (percent), which is ranked on number 2621 of all counties in the United States. Median Household Income 2017 was $80,701 (percent), which is ranked on number 126 of all counties in the United States. To the area of Boulder County also includes Boulder, CO Metropolitan Statistical Area and Denver-Aurora, CO Combined Statistical Area.