111 W. Montgomery Avenue
Rockville, Maryland 20850
The principal research facility at the Montgomery County Historical Society is the Jane C. Sween Library, a non-circulating library and archives located at the Beall-Dawson Historical Park in Rockville.
Library and Archive Collections
To learn more about the resources available at the Library, click here.
Research services are available in the MCHS library collections. For information about submitting a research request, click here.
Hours and Directions
The Jane C. Sween Library is located on Middle Lane between N. Adams St. and N. Van Buren St. in Rockville, MD. The Library is open Wednesday-Friday, 10-4 p.m., and Saturday 12-4 p.m. Closed major holidays.
In the case of inclement weather, we follow the public school system on weekdays, and the county Recreation Department on weekends. If the county schools are closed, or the Recreation Department cancels weekend activities, the museums and library are closed. (County Recreation Inclement Weather Line: 240-777-6889)
For directions to the library, click here.
For more information call 301-340-2974 or e-mail