Henning Karl Larsen (12 December 1910 – 11 January 2011) was a Danish marathon runner who competed at the 1948 Summer Olympics in London. Larsen joined Helsingør IF's football program at the age of 13 but eventually switched to representing the club in track and field athletics. He went on to earn twelve national titles, including nine in the marathon, and finished 8th and 10th in the marathon at the 1946 European Athletics Championships and 1948 Summer Olympics respectively. Outside of athletics he ran a grocery store and a dry cleaning business and provided the financing to found the Helsingør Pigegarde (Helsingør Women's Guard). He died in January 2011, one month after his hundredth birthday.