Concert Venues in Dubuque, IA Five Flags Center - Theatre Where: 405 Main Street, Dubuque, Iowa - 52001 Events: 18 Mississippi Moon Bar - Diamond Jo Casino Where: 301 Bell Street, Dubuque, Iowa - 52001 Events: 6 Five Flags Center - Arena Where: 405 Main Street, Dubuque, Iowa - 52001 Events: 2