Gregory Harrison is a 73-year-old from Avalon, Santa Catalina Island, California, United States. We trawled the web to determine that Gregory Harrison's height is 5ft 10 ¾ (179.7 cm). This makes him 1.6 inches taller than the average male in the United States. Are you looking for more information about Gregory Harrison and his career? We found resources at imdb.com & ibdb.com.