Duga may refer to:

• Duga (moth), a synonym of a genus of moths
• Duga radar, Soviet radar system deployed 1976-1989
• Duga (magazine), Yugoslav and Serbian weekly newsmagazine
• Shaft bow, element of horse harness to attach to vehicle shaft

Geography

• Duga Island, island in Adriatic Sea, belonging to Croatia
• Duga Resa, municipality in Karlovac County, Croatia
• Duga, Podgorica, town in Podgorica Municipality, Montenegro
• Duga, Nikšić, town in Nikšić Municipality, Montenegro
• Duga, Štimlje, town in Štimlje municipality, Kosovo