How tall is John Gielgud? We trawled the web to determine that John Gielgud's height is 5ft 11 (180.3 cm). This makes him 1.9 inches taller than the average male in the United States. Are you looking for more information about John Gielgud and his career? We found resources at ibdb.com, imdb.com, org.uk, tcm.com & theguardian.com.