Colorado saw an influx of 200,386 people from other states and abroad between 2013 and 2014, the U.S. Census Bureau reported. For the sixth time in the past seven years, Denver County has led the state in numeric population growth, according to the US Census Bureau. The Census Bureau’s recently released 2014 population estimates show that Denver County (the City and County of Denver) had a population of 663,862 on July 1, 2014, an increase of 15,461 over their July 2013 estimate. Denver’s 2010 Census population count was 600,158.
Here is a list of the top 10 Colorado counties by numeric population change between 2013-2014 reported on DenverUrbanism.com