Marker buoy may refer to:

• Surface marker buoy used by divers
• a floating sea mark
• a light-emitting or smoke-emitting buoy used in naval warfare

• Wilbur Davenport
• Wilbur De Paris
• Wilbur Dorsey Clayton
• Wilbur Downs
• Wilbur Fiske Sanders
• Wilbur Fisk Tillett
• Wilburforce Colony
• Wilbur F. Sanders
• Wilbur Glenn Voliva
• Wilbur Good
• Wilburgstetten
• Wilbur Hall
• Wilbur Hall (musician)
• Wilbur Harden
• Wilbur Henry
• Wilbur Higbee
• Wilbur Higby
• Wilbur Holland
• Wilbur Huckle
• Wilbur Jackson
• Wilbur J. Cohen
• Wilbur Jennings
• Wilbur Johns
• Wilbur Joseph Cohen
• Wilbur J. Peterkin