National Archives at Denver

Family History/Genealogy Research


We Moved:
The National Archives at Denver is open to the public at our new location:

  • 17101 Huron Street, Broomfield, CO 80023
  • The main number for the Archives is 303-604-4740
  • E-mail:

Our research room hours for both genealogy and research of our historical textual records is 8:30-4:00 p.m., Monday-Friday, except public holidays.

Take I-25 North to Exit 229 (Lafayette/Brighton), go up the ramp. Turn left at the stop light, cross over the interstate and turn right at the first opportunity (Huron Street, approximately 1/8 mile from the interstate). We are the blue and white building to the northwest. The road narrows right after you cross I-25, and then there is a Right Turn only lane; this is Huron St. and where you need to turn. There is no sign that points to our facility. If you go past Children's Hospital, you have gone too far.

Our Microfilm/Genealogy Room has over 60,000 rolls of microfilmed Federal records, most of which are valuable for researching family histories within the United State.

Our holdings include:

  • Federal population censuses for all States, 1790-1930
    Learn More
  • Indexes for the 1880, 1900, 1910, and 1920 censuses (indexes are not available for all census years and all states)
  • Revolutionary War records Learn More
  • Pension and bounty land warrant applications
  • Ship's passenger lists Learn More
  • Indian censuses
  • Utah polygamy prosecution case files
  • Colorado naturalizations Learn More

Resources Available to You

We have five computers available for your research:

  • Three computers have Internet access, including free access to Ancestry and Fold3, two of the largest genealogy databases available online.
  • Two computers access our collection of CD databases.
  • A team of over twenty qualified volunteers are available to assist you with research needs and offer tips and tools for future research visits.

Additional Resources

Records Available to You

Our microfilmed Federal records include the following types of materials:

Census Records

The Constitution requires that the Federal Government count the population of the United States every ten years. Census records provide basic facts about your ancestors and reveal clues to finding other records in the National Archives.

We have microfilm copies of the Federal population censuses for all states from 1790 to 1930, and also a comprehensive selection of indexes.

  • Early censuses provide the name of the head of the household and the number of occupants.
  • Later censuses reveal the names of each family member as well as age, marital status, occupation, state or country of birth, year of immigration, and year of naturalization.
  • Census schedules are arranged by year and there under, by location.
  • Most census schedules are searchable by head of household and some by any name provided on the census schedule.

Immigration Records (Ship's Passenger Lists)

With the creation of the Customs Bureau in 1820, the Federal Government began requiring passenger lists from ships docking at U.S. ports. Since then, over 55 million people have immigrated to the United States.

We have microfilm copies of ship's passenger lists from the following ports:

  • Atlantic ports (small):   Indexes 1820-1952, Passenger Lists 1820-1948
  • Baltimore, MD:   Index 1820-1952, Passenger Lists 1820-1909 (with gaps)
  • Boston, MA:   Index 1848-1891, 1902-1906, Passenger Lists 1820-1943 (with gaps)
  • Galveston, TX:   Index 1896-1951, Passenger Lists 1896-1951
  • Gulf ports (small):   Indexes 1890-1924
  • New Orleans, LA:   Index 1853-1899, Passenger Lists 1820-1902 (with gaps)
  • New York, NY:   Index 1820-1848, 1897-1943, Passenger Lists 1820-1957 (with gaps)
  • Philadelphia, PA:   Index 1800-1948, Passenger Lists 1800-1945 (with gaps)
  • St. Albans, VT (Canadian entries):   Indexes 1894-1952 (with gaps), Passenger Lists 1929-1949

Ship's Passenger Lists documentation varies:

  • 19th century lists include the traveler's name, age, occupation, destination, and country of origin.
  • Late 19th century and 20th century lists may include the traveler's place of birth, assets, health, last foreign residence, the name of a relative in the home town, information about previous journeys to the U.S., and their final U.S. destination.

Please call to verify we have the microfilm you need:   (303) 604-4749

Naturalization Records

To order naturalization records for these states, please e-mail:

Also view the New Mexico Index of Naturalizations.

Immigrants become U.S. citizens through naturalization. Upon meeting residency requirements, immigrants petition the courts for citizenship and take an oath of allegiance. Under former laws, immigrants could petition for citizenship in Federal, state, or county courts. Naturalization records may include the:

  • Declaration of Intention
  • Petition for Naturalization
  • Certificate of Naturalization

We have naturalization records from Federal courts in Colorado, Montana, New Mexico, and Utah for the following time periods:

  • Colorado:   Denver, 1877-1972
  • Montana:   1891-1929
  • New Mexico:   1882-1917
  • Utah:   1909-1930

The data in the naturalization records varies:

  • Early naturalization records, from 1790 through 1906, typically provide an immigrant's name and country of origin.
  • In 1906, the Bureau of Immigration and Naturalization standardized the naturalization process and began to require more detail on the naturalization forms.

Military Service Records

Order copies of WWI Draft Registration Cards online.

We have several series of microfilm related to military service. The records:

  • cover the Revolutionary War up to and including the Spanish American War.
  • may be indexes, compiled service records, or pension files.

We also have microfilm copies of World War I Draft Registration Cards for:

  • Colorado
  • Montana
  • North and South Dakota
  • Utah
  • Wyoming