Operation Neptune (disambiguation)

Operation Neptune was the code name for the naval phase of the Allied Invasion of Normandy during World War II.

Operation Neptune may also refer to:
 * Operation Neptune (espionage), a disinformation campaign by communist Czechoslovakia in 1964
 * Operation Neptune (Afghanistan) (2005)
 * Operation Neptune (New Zealand), a commemoration of the 75th anniversary of the New Zealand Navy
 * Operation Neptune (video game), a computer game