Charlie Houchin (born November 3, 1987) is an American competition swimmer who specializes in freestyle events. He earned a gold medal as a member of the winning United States team in the 4x200-meter freestyle relay at the 2012 Summer Olympics.
At the 2011 World Aquatics Championships in Shanghai, Houchin competed in one event, the 400-meter freestyle. Houchin posted a time of 3:48.80 in the heats and did not advance to the final, finishing fourteenth overall.
At the 2012 United States Olympic Trials, the qualifying meet for the 2012 Olympics, Houchin made the U.S. Olympic team for the first time by finishing sixth in the 200-meter freestyle with a time of 1:46.88, which qualified him to swim in the 4x200-meter freestyle as a member of the U.S. relay team. Houchin also competed in the 400-meter freestyle at the trials, and finished fourth overall (3:48.32). At the 2012 Summer Olympics in London, Houchin earned a gold medal by swimming for the winning U.S. team in the preliminaries of the 4x200-meter freestyle relay.