List of naval anti-aircraft guns

Naval anti-aircraft guns include anti-aircraft guns specially designed or adapted for mounting on ships, and naval guns adapted for high-angle fire. Today they have been largely superseded by surface-to-air missiles and automatic close-in weapon systems.

Caliber (mm)	Weapon name	Country of origin	Period
20 mm	Oerlikon 20 mm cannon	Switzerland	World War II
25 mm	Type 96 25 mm AT/AA Gun	Empire of Japan	World War II
28 mm ×4	1.1"/75 (28mm) gun	United States	World War II
37 mm x 2	3.7 cm SK C/30	Nazi Germany	World War II
40 mm	QF 2 pdr Mk II, Mk VIII Vickers 2-pounder pom-pom	United Kingdom	World War I World War II
40 mm	Bofors 40 mm gun	Sweden	World War II - Cold War
76.2 mm	QF 3 inch 20 cwt	United Kingdom	World War I
76.2 mm	3"/23 caliber gun	United States	World War I - 1920s
76.2 mm	3"/50 caliber gun	United States	World War II - Cold War
76.2 mm x 2	3"/70 Mark 26 gun	United States	Cold War
102 mm	QF 4 inch Mk V naval gun	United Kingdom	World War I World War II
102 mm	QF 4 inch Mk XVI naval gun	United Kingdom	World War II - Cold War
113 mm	QF 4.5 inch Mk I - V naval gun	United Kingdom	World War II - Cold War
120 mm	Type 10 120 mm AA Gun	Empire of Japan	World War II
127 mm	5"/25 caliber gun	United States	1920s - World War II
127 mm	5"/38 caliber gun	United States	World War II - Cold War
133 mm	QF 5.25 inch Mark I naval gun	United Kingdom	World War II