Visit the CBMSO

Civil War Museum, Clara Barton Museum, Civil War Beer, Jonathan Letterman

Clara Barton Missing Soldiers Office

(202) 824-0613

437 7th Street NW 

Washington, D.C. 20004  

Mailing Address – PO Box 470, Frederick, MD  21705

Hours of Operation

The CBMSO is currently open on Saturdays for lectures and tours. For a complete list of lecture topics, check the events calendar.  

Open Saturdays

11:00 AM — 5:00 PM

Special July 4th Hours: 12:00 PM to 8:00 PM


For information on group tours of the Clara Barton Missing Soldiers Office, please contact Katie Reichard at 301-695-1864, extension 1010.

Exploring Penn Quarter

For more information on restaurants, shopping and other attractions please visit the Destination D.C. website.


Several parking garages are located within walking distance to the Museum.  Rates apply. 


The Clara Barton Missing Soldiers Office  is central to three Metro  stations.  Rates apply. 

  • Archives on the Green/Yellow line to the south. 0.1 miles away
  • Gallery Place Chinatown: Largest station at the junction of Red, Green and Yellow Lines 0.2 miles away
  • Judiciary Square on the Red Line to the east. 0.3 miles away

Motor Coach Information 

Please note that a Metro Bus stop is located directly in front of the Clara Barton Missing Soldiers Office.  For information on bus and motor coach please visit the District Department of Transportation website to view the  truck and bus map.  

Contact Us

For more information on CBMSO please call 301-695-1864 ext 1004


Frederick Patients after the Battle of Antietam

Search through our list below of patients that were treated in Frederick after the Battle of Antietam.