The Archives will be closed on Thursday, February 16 and Monday, February 20.

Tuesdays are available for appointments, if needed.



The Montgomery County Archives 

Established on July 29, 1985, the Montgomery County Archives serves as the institutional memory of the government of Montgomery County, Maryland. The Archives is a repository for permanent records of historical or evidential value created or received by the County government in the course of its business activities. The Archives identifies, acquires, organizes, describes, and preserves historic records of the Montgomery County Government. 

Guide to Research at the Archives
Research at an archives is conducted differently from library or other institutional research. Please read the Research Guide to understand how the collections are arranged.
Our finding aids are all available as searchable PDF documents that you may download and review. 


8540 Anniversary Circle
Gaithersburg, MD 20877

Open Hours

Mondays :   10:00 AM to 4:00 PM
Thursdays : 10:00 AM to 2:00 PM
and by appointment.
We recommend that you call or email the archivist several days before you make a research visit. The archivist can provide you with guidance on what is available in  our collections, and on how to review our finding aids online for items of interest. This advance work will make your research time at the archives more effective.
Contact the Archivist
Telephone: (301) 926-5002  – Leave a voicemail message if the archives are closed.
You may also call Montgomery History’s Sween Library at (301) 340-2974 for more information.