/ Back Share Waterloo Convention Center at Sullivan Brothers Plaza Website Save Waterloo Convention Center at Sullivan Brothers Plaza200 West 4th Street Waterloo, Iowa 50701 United StatesDetailsOpen in Google Maps Waterloo Convention Center at Sullivan Brothers Plaza 200 West 4th Street Waterloo, IA 50701 (319) 291-0155 Overview Map Amenities Overview Space SQ FT Exhibit Hall 19,080 Room 10 980 Room 11/13 700 Room 12 1,728 Room 21/23 3,984 Room 22 2,988 Room 24/25 900 Seminar 1,200 Amenities Featured