National Archives at Denver

About Our Archival Records

As a center for historical and genealogical research, we have both an Archival and Microfilm Research Room.   Visit our Research Rooms

At our Denver facility, we have nearly 50,000 cubic feet of original archival records dating from 1847 to the 1990s.

These records include:

  • paper documents
  • photographs
  • maps
  • architectural drawings

The archival holdings are arranged by record group (RG), a body of records from an agency or bureau, identified by an RG number.


Subjects covered include, but are not limited to:

  • homesteading
  • mining
  • Indian agencies
  • railroads
  • dam construction and other reclamation projects
  • national parks and forests
  • naturalizations
  • the home front during World War II
  • proceedings of territorial courts

Microfilm Publications

In addition to unique archival records, the Archives facility has a large collection of National Archives microfilm publications.

The microfilm reproduces records for the study of:

  • history
  • economics
  • public administration
  • political science
  • law
  • ethnology
  • genealogy

Specific subjects include:

  • U.S. diplomacy
  • Revolutionary War
  • Civil War and Reconstruction
  • Native American-Government relations
  • Westward expansion
  • World War II


These records were created or received by nearly 80 Federal agencies and the Federal courts in:

  • Colorado

  • Montana

  • New Mexico

  • North Dakota

  • South Dakota

  • Utah

  • Wyoming