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Jefferson County, Colorado
Genealogy, History & Facts

County Vital Records ∣ County Census Records ∣ County Courthouse and Government Records ∣
County Societies, Family History Resources and County Genealogy Links

Jefferson County, Colorado Facts

When was Jefferson County, CO Created?
Jefferson County was established on November 1, 1861 .

What is the County Seat of Jefferson County, CO?
The County Seat is located in Golden and the county government website is http://jeffco.us/

What counties are adjacent to Jefferson County, CO?
Bordering Counties are Boulder County, City and County of Broomfield, Adams County, City and County of Denver, Arapahoe County, Douglas County, Teller County, Park County, Clear Creek County, Gilpin County .

Jefferson County, CO Vital Records

Where can find Jefferson County Birth, marriage, Divorce and Death Records?
Jefferson County vital records can be found at the Colorado Office of Vital Records which has copies of birth, marriage, divorce and death records. There is a fee for each copy requested. Please refer to the information to the Statewide Vital Records in Colorado for current fees and application process.

You can search online for Jefferson County Birth, Marriage, Divorce or Death Records. You can also Order Electronically Online or can download an application for Colorado Birth Certificate, Marriage Verification, Divorce Verification, Death Certificate Applications to mail.

Jefferson County, CO Census Records


What Jefferson County, CO census records are available?
There are many types of census records for Jefferson County guide you in researching your family tree. Federal Population Schedules are available for 1870, 1880 (free index), 1890 (fragment), 1900, 1910, 1920, 1930, 1940.

Jefferson Co. Mortality Schedules can be acquired for 1870 and 1880. Jefferson Co. Industry and Agriculture Schedules is available for 1870 and 1880. Jefferson Co. Union Veterans Schedules can be acquired for 1890. There are free online and printable census forms to aid with your research.

Jefferson County, CO Societies and Family History Resources

What genealogical and historical societies, archives, museums, associations and libraries are available for Jefferson County, CO?
A list of Jefferson County Historical  and Genealogical Societies, Libraries, Archives. See also list of Statewide Colorado Archives, Historical & Genealogical Societies.

Jefferson County, CO Courthouse and Government Records

Jefferson County Courthouse

What genealogical records can I find in the Jefferson County Courthouse?

Researchers frequently overlook the great importance of Jefferson County court, probate, and land records data as a useful resource of ancestry and genealogy information. Buried away in Colorado courthouses and archives everywhere are the ambitions and frustrations of countless Colorado residents.

The possibilities are excellent that your forefathers have left a comprehensive document of at least a number of facets of their lives in the Jefferson County court records. Even if your forebears is not referred to in a Court case, contemplate all of the other procedures that could have lead to him or her to appear in court records. See Also Colorado Corthouse Records Research Guide.

A small part was annexed to Park, 1903

Where can I connect with other Jefferson County, CO Researchers through message boards and forums?

What other genealogical resources are available in Jefferson County, CO?
The following are web links to Genealogy, Records and Resources pertaining to Jefferson County.

Jefferson Co. CO Books, Newspapers & Publications

Jefferson Co. CO Birth, Marriage & Death Records

Jefferson Co. CO Court, Probate Land and Tax Records

Jefferson Co. CO Census Records

Jefferson Co. CO Cemeteries & Church Records

Jefferson Co. CO Family Websites, Pictures & Histories

Jefferson Co. CO General and History Websites

Jefferson Co. CO Maps, Atlases & Gazetteers

Jefferson Co. CO Military Records

Jefferson Co. CO Schools & Directories

  • Colorado City Directories  (search.ancestry.com) This database is a collection of city directories for various years and cities in Colorado. Generally a city directory will contain an alphabetical list of its citizens, listing the names of the heads of households, their addresses, and occupational information. Sometimes the wife’s name will be listed in parentheses or italics following the husband’s. Often, dates of deaths of individuals listed in the previous year’s directory are listed as well as the names of partners of firms, and when possible, the forwarding addresses or post offices of people who moved to another town. In addition to the alphabetical portion, a city directory may also contain a business directory, street directory, governmental directory, and listings of town officers, schools, societies, churches, post offices, and other miscellaneous matters of general and local interest.
  • Prospector  (search.ancestry.com) students of the Colorado School of Mines, c1939.
  • Prospector  (search.ancestry.com) The associated students of the Colorado School of Mines, 1940.
  • The Colorado state business directory: 1876, 1879, 1880, 1881, 1882, 1883, 1884, 1885, 1887-8, 1889, 1890, 1894, 1896, 1899, 1900, 1901, 1903, 1906, 1909, 1910, 1920, 1921, 1923  (search.ancestry.com)