Jefferson County, Colorado

Jefferson County was a county of the extralegal United States Territory of Jefferson that existed from November 28, 1859, until February 28, 1861. Its territory covered a broad swath surrounding the region of the Pike's Peak Gold Rush, and was a functioning democratically elected government until the organization of the Territory of Colorado in 1861. At that time, the successor Jefferson County was permanently created, taking its name from its predecessor and incorporating the heart of its territory.

This is a list of the National Register of Historic Places listings in Jefferson County, Colorado. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Jefferson County, Colorado, United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in a map.There are 87 properties and districts listed on the National Register in the county, including 1 National Historic Landmark.     This National Park Service list is complete through NPS recent listings posted October 13, 2023.

University of Science, Arts and Technology (USAT) is an offshore private medical school located near Olveston, Montserrat. The university opened in 2003 with administrative headquarters in Colorado and its campus located in Montserrat. The school has graduates practicing in both the United States and worldwide and admits both domestic and foreign students.

Geneva Glen Camp is a co-educational, non-profit, residential summer camp located in Indian Hills, Colorado. Geneva Glen Camp is accredited by the American Camp Association.

The Everhardt Ranch, located in southeast of Evergreen, Colorado, dates from 1867. A portion of the ranch with three of its historic buildings was listed on the National Register of Historic Places in 1980.It was deemed "significant for its associations with Johnny Everhardt and Gus and Marie Herzman, pioneer settlers in the Evergreen area, and for its architectural features which reflect the characteristic features of an early Colorado mountain ranch."It is located about .25 miles (0.40 km) southeast of the junction of Lone Peak Drive and North Mountain Park Rd., northeast of Evergreen Highlands and west of High Dr., about 4 miles (6.4 km) southeast of Evergreen.Its nomination was written in cooperation with Hiwan Homestead Museum.

Tiny Town & Railroad is a miniature village containing over 100 1/6 scale buildings and a 15 in (381 mm) gauge miniature railway close to Morrison, Colorado.

Indian Hills is an unincorporated town, a post office, and a census-designated place (CDP) located in and governed by Jefferson County, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The Indian Hills post office has the ZIP code 80454. At the United States Census 2020, the population of the Indian Hills CDP was 1,474.

KRMT (channel 41) is a religious television station in Denver, Colorado, United States, airing programming from the Daystar Television Network. It is owned and operated by Daystar through its Community Television Educators subsidiary, and maintains offices on West 64th Avenue in Arvada, and its transmitter is located on Mount Lindo in rural southwestern Jefferson County.

The Bear Creek meteorite, formerly known as the Colorado meteorite, is an octahedrite meteorite that was found in 1866 in Jefferson County, Colorado, United States. It has a mass of 226.7 kg (500 lb) and average dimensions of 350 mm × 250 mm × 11 mm (13.78 in × 9.84 in × 0.43 in).

Midway House, also known as Broken M Bar Ranch and Meyer Ranch, is an 1889 Queen Anne ranch house located near Aspen Park, Colorado. It is listed on the National Register of Historic Places.

Berrian Mountain is a mountain summit in the Front Range of the Rocky Mountains of North America. The 9,151-foot (2,789 m) peak is located 0.9 miles (1.5 km) north-northeast (bearing 17°) of the community of Aspen Park in Jefferson County, Colorado, United States.

Aspen Park is an unincorporated community and a census-designated place (CDP) located in Jefferson County, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The population of the Aspen Park CDP was 810 at the United States Census 2020. The Aspen Park Metropolitan District provides services. The Conifer post office (ZIP Code 80433) serves the area.