Rear Admiral Philip John Mack DSO* (6 October 1892 – 29 April 1943) was an officer of the British Royal Navy.

On 9 August 1910 he was posted to the battlecruiser Indomitable as a midshipman, transferring to the cruiser Amethyst on 15 July 1913,[1] having been promoted to sub-lieutenant on 15 June.

From December 1925 until mid-1927 he was the executive officer of the heavy cruiser Hawkins on the China Station, receiving promotion to commander on 30 June 1927.

For brief period between April and June 1940 he commanded Janus,[1] while Jervis was under repair at the Swan Hunter yard in Newcastle, after a collision with the Swedish ship SS Tor near Longstone Lighthouse.

[7] Mack then returned to Jervis, to serve as Captain (D) of the 14th Destroyer Flotilla in the Mediterranean Fleet,[1] and was awarded the Distinguished Service Order on 11 July 1940.