Home › Venues › Diamond Jo Casino Diamond Jo Casino Tickets Buy tickets for concerts at Diamond Jo Casino in Dubuque, IA. No Upcoming Events No upcoming events scheduled at Diamond Jo Casino. Please contact us with any corrections. Hotels & Lodging Near Diamond Jo Casino About the Venue Diamond Jo Casino At-a-Glance Capacity 344Address400 E 3rd StDubuque, IA 52001United States Map & Directions Website diamondjodubuque.boydgaming.com/Advertisement