List of museums in Maryland

This list of museums in Maryland encompasses museums, defined for this context as institutions (including nonprofit organizations, government entities, and private businesses) that collect and care for objects of cultural, artistic, scientific, or historical interest and make their collections or related exhibits available for public viewing. Museums that exist only in cyberspace (i.e., virtual museums) are not included.

Defunct Museums

 * American Dime Museum, Baltimore, museum of curiosities
 * Antique Toy Museum, Baltimore, closed in 2012
 * Bagpipe Museum, Ellicott City
 * Brannock Maritime Museum, Cambridge - collections merged with Richardson Maritime Museum in 2004
 * Christian Heritage Museum, Hagerstown
 * Contemporary Museum, Baltimore, closed in 2012
 * Fells Point Maritime Museum, Baltimore, collections now at Maryland Center for History and Culture
 * Mount Vernon Museum of Incandescent Lighting, Baltimore, 2002, collection now at Baltimore Museum of Industry,
 * Museum of Menstruation and Women's Health, New Carrollton, closed in 1998, now online only,
 * National Children's Museum was located in National Harbor from 2012 to 2015
 * Peale Museum, Baltimore - holdings transferred to Maryland Historical Society in 1999
 * PlayWiseKids, Columbia
 * Presidential Pet Museum, moved from Annapolis to President's Park, Williamsburg, VA
 * Queen City Transportation Museum, Cumberland, closed in 2011
 * Ripken Museum, Aberdeen, memorabilia about baseball player Cal Ripken and family, baseball memorabilia
 * Townsend House & Pullen Museum, Catonsville, closed in 2021 when the Catonsville Historical Society dissolved and sold the building.
 * U.S. Army Ordnance Museum, Aberdeen, closed Maryland museum location in 2010, moving to Fort Lee (now Fort Gregg-Adams), Virginia, outdoor exhibits still on display
 * Waters House History Center, Germantown, closed in 2010
 * Wheels of Yesterday, Ocean City, closed in 2012