City of Frederick 101 North Court Street, Frederick, MD 21701, 301-694-1380, Provides information on local city services and local government offices in the Frederick area. more... 

Downtown Frederick 121 North Bentz Street, Frederick, MD 21701, 301-698-8118, A National Main Street Program, this organization promotes and supports local lodging, dining, attractions, and shopping in the historic downtown area of Frederick. more... 

Frederick County Chamber of Commerce 8420 B Gas House Pike, Frederick, MD 21701, 301-662-4164, Promotes and supports local businesses and industries in the Frederick County area plus provides relocation information. more... 

Tourism Council of Frederick County 19 East Church Street, Frederick, MD 21701, 301-228-2888, 800-999-3613, Provides information on local lodging, dining, shopping, attractions, and events in the Frederick County area. more...