Diamond Jo Casino
Casino in Dubuque, IA · 301 Bell Street, Dubuque, IA 52001
Operated by Boyd Gaming
How old do you have to be to gamble at Diamond Jo Casino?
18+ or 21+, depending on the casino.
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Licensed by the Iowa Racing and Gaming Commission.
Source: https://irgc.iowa.gov/licensing-information/facility-licenses/diamond-jo, verified 2026-10-28.
Last checked 2026-10-28.
Directory listing compiled from public operator and property information. Confirm hours and ID rules with the venue before you go.
18+ or 21+, depending on the casino.
Gambling problem? Call 1-800-BETS OFF. National Problem Gambling Helpline: 1-800-MY-RESET (1-800-697-3738).