John Tynan
- Born 16 February 1891, Okains Bay, Canterbury, New Zealand
- Died 19 January 1951
- Last rank Leading Stoker on minesweepers (rank unknown)
- Service number 92684
- Served In Merchant Marine Reserves, Royal Navy, England
- Periods of serviceMay 1917 to 28 November 1920
- BuriedHamilton East Soldiers' urupā, SOLD3-B-12
John Tynan joined the armed forces in England while he was working on Union Steamship Company Troopships.