Inga Kristina Gentzel (later "Dahlgren", 24 April 1908 – 1 January 1991) was a Swedish runner, who won a bronze medal in the 800 m at the 1928 Summer Olympics. Shortly before the Olympics she set a new world record in this event, which was broken two weeks later, but remained a national record until 1943. Gentzel won the silver medal in the 1000 m at the 1926 Women's World Games.