Jefferson County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 582,910, making it the fourth-most populous county in Colorado. The county seat is Golden, and the most populous city's Lakewood.
Breckenridge is the home rule municipality that is the county seat and the most populous municipality of Summit County, Colorado, United States. The town population was 5,078 at the 2020 United States Census. Breckenridge is the principal town of the Breckenridge, CO Micropolitan Statistical Area. The town also has many part-time residents, as many people have vacation homes in the area. The town is located at the base of the Tenmile Range.
The City of Victor is a Statutory City in Teller County, Colorado, United States. Gold was discovered in Victor in the late 19th century, an omen of the future of the town. With Cripple Creek, the mining district became the second largest gold mining district in the country and realized approximately $10 billion of mined gold in 2010 dollars. It reached its peak around the turn of the century when there were about 18,000 residents in the town. Depleted ore in mines, labor strife and the exodus of miners during World War I caused a steep decline in the city's economy, from which it has never recovered. The population was 379 at the 2020 census. There is a resumed mining effort on Battle Mountain.
The Georgetown Loop Railroad is a 3 ft narrow gauge United States heritage railroad located in the Rocky Mountains in Clear Creek County, adjacent to Interstate 70 in Colorado.
Manhattan is a ghost town located 4 miles (6.4 km) north of Rustic in Larimer County, Colorado, United States at an elevation of 8,474 feet (2,583 m). It became a mining town after discovery of gold in the area in September 1886. The area was difficult to mine and produced small quantities of gold, and the population dropped off by the turn of the century. The land was acquired by the United States Forest Service and by 1933, the remaining structures were dismantled because they were considered a fire hazard, but a cemetery remains.
Thomas L. "Tom" Golden was a miner from Georgia, United States, who was one of the earliest prospectors in present-day Jefferson County, Colorado. Golden arrived in the then-Kansas Territory in 1858 around the beginning of the Pike's Peak Gold Rush. He later partnered with George A. Jackson, a native of Glasgow, Missouri who discovered gold at the confluence of Chicago Creek and Clear Creek on January 7, 1859.
Caribou is an extinct silver mining town located near Nederland in Boulder County, Colorado, United States. It was named after the Caribou silver mine nearby. The Caribou post office operated from January 31, 1871, until March 31, 1917. The Caribou Ranch recording studio was located several miles away, on the road from Nederland up to Caribou.
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.
Gold mining in Colorado, a state of the United States, has been an industry since 1858. It also played a key role in the establishment of the state of Colorado.
Oro City is a ghost town in Lake County, Colorado, United States
Dyersville was a mining town — now a ghost town — in Summit County, Colorado, United States. It was named after Methodist minister John Lewis Dyer. Nothing remains of the town except the roofless walls of a couple of log cabins.
Montana County was a county of the United States Territory of Kansas that existed from February 2, 1859 to January 29, 1861, when Kansas joined the Union as a state.
Arapahoe County was a county of the extralegal United States Territory of Jefferson that existed from November 28, 1859, until February 28, 1861. The county name was also spelled Arapaho County, Arapahoe County, Arrapahoe County, and Arappahoe County. The county seat was Denver City.
Park County was a county of the extralegal United States Territory of Jefferson that existed from November 28, 1859, until February 28, 1861.
Saratoga County was a county of the extralegal United States Territory of Jefferson that existed from November 28, 1859, until February 28, 1861.
Russell Gulch, is a former mining town, now largely a ghost town, in Gilpin County, Colorado, United States. Although the population was once much larger than today, and most of the larger commercial buildings stand empty, the town is not completely deserted.
Mount Vernon is an extinct town from the former Jefferson Territory, the site of which is located in present-day Jefferson County, Colorado.
Holy Cross City is an extinct town located in Eagle County, Colorado, United States. Holy Cross City got its name from Mount of the Holy Cross, located nearby. The Holy Cross post office operated from January 23, 1882, until February 8, 1899, and from December 7, 1904, until August 7, 1905. Presently, the former townsite is located along Holy Cross City Trail within Holy Cross Wilderness, part of White River National Forest. The Mount of the Holy Cross is not visible from the townsite.
Parkville is a ghost town located in, and the original county seat of, Summit County, Colorado, United States. Parkville was a gold mining camp that flourished from 1860 to 1866 near the confluence of the middle and south forks of the Swan River.
United States 
Colorado 
