John Mowbray or John de Mowbray may refer to:
People John de Mowbray, 2nd Baron Mowbray (1286–1322), Lord of Tanfield and Well, Yorkshire and Governor of York John de Mowbray, 3rd Baron Mowbray (1310–1361), only son of the 2nd Baron Mowbray John de Mowbray, 4th Baron Mowbray (1340–1368), knighted by King Edward III and died en route to the Holy Land John de Mowbray, 1st Earl of Nottingham (1365–1383), elder son of the 4th Baron Mowbray John Mowbray, 2nd Duke of Norfolk (1392–1432), also Baron Segrave, Baron Mowbray and Earl Marshal of England John Mowbray, 3rd Duke of Norfolk (1415–1461), active during the Wars of the Roses for the Yorkists and Lancastrians John de Mowbray, 4th Duke of Norfolk (1444–1476), only son of the 3rd Duke, laid siege to Caister Castle in 1469 Sir John Mowbray, 1st Baronet (1815–1899), British Conservative politician and MP John Mowbray (rugby league) (born 1940), Australian rugby league footballer John Code Mowbray (1918–1997), Justice of the Supreme Court of Nevada John Mowbray of Barnbougle, Scottish landowner and supporter of Mary, Queen of Scots
Pen names John Mowbray, a pseudonym used for 13 novels by juvenile fiction author Gunby Hadath (1871–1954) John Mowbray, a pseudonym used for Call in the Yard (1931) by crime and thriller writer John Haslette Vahey (1881–1938)