City of Hannibal 320 Broadway, Hannibal, MO 63401, 573-221-0111, Provides information on local city services and local government offices including information of city departments and city officials. more... 

Hannibal Area Chamber of Commerce 623 Broadway, P.O. Box 230, Hannibal, MO 63401, 573-221-1101, Provides visitor and relocation information. 

Hannibal Convention & Visitors Bureau 505 North Third Street, Hannibal, MO 63401, 573-221-2477, 866-263-4825, Provides information on local lodging, dining, shopping, attractions, and entertainment in the Hannibal area. more...