Since its establishment, the Archives has been active in developing its collection by acquiring primary sources and papers of individuals who have significantly contributed to the history and development of the Cordillera Region in particular and Northern Luzon in general.
The Archives houses the papers of Robert B. Fox, Sr., Laurence Lee Wilson, Howard Fry, Armando Malay, Augustus Saboy, Otto Scheerer, Jules De Raedt, Fay Dumagat, and the Cordillera Mass Movement Archives. Also among its collections are thousands of photographs that showcase the history and culture of the Cordillera. Aware of the need to preserve the Archives collection for posterity, the Archives has exerted efforts to comply with technical standard requirements in the preservation and conservation of documents by digitizing the collection, using archival supplies, equipment and storage containers.