Jefferson County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 582,910, [1] making it the fourth-most populous county in Colorado.

Engage Jeffco includes important updates from the county, community events, classes, health and safety information, announcements and more. Jefferson County Opioid Task Force Meeting 9 a.m. | …

Jefferson County, aka JeffCo, is located along the Front Range of the Rocky Mountains, adjacent to Denver. As of 2020, the population was 582,910, making Jefferson one of the most populous …

This free county lookup tool allows you to figure out what US county you're in by doing a search of your address.

Located immediately west of Denver in Jefferson County, the city of Lakewood began as a scattered farming community and was incorporated in 1969 during its post- World War II population boom.

Lakewood is Colorado’s fifth largest city and the largest in Jefferson County. It is located on the west side of the Denver metroplex and nestled up to the spectacular Rocky Mountains.

Jefferson County is a county in the state of Colorado in the United States. As of the 2020 census, there were 582,910 people living there. This made it the fourth most populous county in Colorado. The …

Oct 13, 2025 · Local information and community profile for Lakewood (Jefferson County, State of Colorado). Contains: population, area codes, time zone, official website, elevation and much more.

Lakewood is the home rule city that is the most populous municipality in Jefferson County, Colorado, United States. [1] The city population was 155,984 at the 2020 U.S. census, making Lakewood the …

Welcome to our dedicated page for Lakewood, located in the state of Colorado, Jefferson County. Here, you will find detailed information about this city, including its geographical location, population data, …