Map Williamston City Hall 161 E. Grand River Ave., Williamston , MI 48895 Add To Trip WebsiteEmailPhone: (517) 655-2774Fax: (517) 655-2797 Description City Hall is located in the heart of Historic Downtown Williamston. Please come by to visit with our friendly staff to learn more about the area. City Hall is open 8am-5pm Monday - Friday. Videos TripAdvisor® Traveler Reviews More To Explore Categories: Historic Sites Attractions City: Williamston Region: Southeast Although the MEDC uses reasonable efforts to maintain the accuracy of the website content, it is not represented to be error free. Read legal information.