What is the population of Jefferson County, CO?
Jefferson County in Colorado has a population of 579,715, per Census ACS 5-Year estimates. The median household income is $107,800 and the median age is 40.4.
Context
Counties are the primary administrative subdivisions of states and a stable unit for tracking population. Jefferson County's population reflects everyone within county lines, including residents of incorporated cities and unincorporated areas.
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Jefferson County in Colorado has a population of 579,715, per Census ACS 5-Year estimates. The median household income is $107,800 and the median age is 40.4.