William Robert Fountaine Addison (18 September 1883 – 7 January 1962) was an English Anglican priest and army chaplain.

He became a Temporary Chaplain of the Forces, 4th Class in the Army Chaplain's Department, British Army, and was 32 years old when the deed took place on 9 April 1916 at Sanna-i-Yat, Mesopotamia, for which he was awarded the VC "for most conspicuous bravery": Addison was a Freemason and was initiated into Aldershot Camp Lodge No.

On the outbreak of World War II he returned to the army and again served as Senior Chaplain to the Forces.

He died in St Leonards-on-Sea, East Sussex, and is buried in Brookwood Cemetery in Surrey.

A replica set of Addison's medals is on display at the Museum of Army Chaplaincy, and at Sarum College in Salisbury.