Jonathan Alan Horton (born December 31, 1985) is a former American artistic gymnast. He was a member of the United States men's national artistic gymnastics team and is the 2008 Olympic silver medalist on horizontal bar, the 2010 World all-around bronze medalist, a two-time Olympian, a two-time U.S. National All-Around Champion, and a 17-time medalist at the U.S. National Championships. At the 2008 Olympics, he also won a bronze medal with his U.S. teammates in the team competition. He also competed at the 2012 Summer Olympics in London, where he qualified for the horizontal bar event final and finished in sixth place. In 2016, he had surgery on his left rotator cuff and as a result was unable to qualify for the 2016 Olympics in Rio de Janeiro.

Horton was born on December 31, 1985, in Houston. His father, Robert, is an engineer, and his mother, Margo, works in real estate. His elder sister, Margo, is a dance instructor. Horton began gymnastics at the age of four in 1990. "I was a wild child", Horton said, "I once climbed a pole in the middle of Target all the way to the ceiling. I used to do back flips on my parents' bed and I rode a garage door to the top when I was 3 years old." He attended Cy-Fair High School in Cypress, Texas.

Horton debuted as a senior (despite still competing as a junior) in 2002 at the U.S. National Championships in Cleveland, Ohio. He placed first on rings and vault, second in the all-around and the floor exercise, and tied for fifth on the horizontal bar. In 2003, he competed in the Winter Cup challenge, where he qualified for the individual event finals. Later that year he was chosen to compete for the United States at the Pan American Games in Santo Domingo where the men's team won bronze and he placed fourth all-around.

Horton competed in the U.S. Nationals and Olympic Team trials in 2004 and placed 13th. That same year, he entered the University of Oklahoma. He was recruited by Iowa, Michigan, Ohio State, Oklahoma, and Penn State, and committed to compete for the University of Oklahoma beginning in 2004 for the 2004–05 NCAA season.

From 2005–08, Horton competed for the Oklahoma Sooners gymnastics team alongside his 2010 & 2011 world teammates Chris Brooks and Steven Legendre. When competing for Oklahoma, he won 6 NCAA titles and 18 All-American honors, breaking the record previously set by Bart Conner. His OU record for titles and honors still stands.

In 2005, Horton once again competed at the Winter Cup, placing eighth all-around, and was selected again for the U.S. National Team.

At the beginning of 2006, during Horton's second year at OU, he won an all-around silver at the Winter Cup. He later competed at the American Cup and won the all-around and rings competitions. That summer, he competed in the U.S. National Championships and won gold on the floor, silver in the all-around, and bronze on the horizontal bar. His performances led to him being chosen to represent the U.S.A. at the 2006 World Artistic Gymnastics Championships in Aarhus. A very young and inexperienced Worlds team, they finished 13th in the qualifying rounds not making the team finals.

In 2007, Horton competed at the Winter Cup and the American Cup. He won his second consecutive American Cup All-Around title, the first male gymnast since Blaine Wilson to achieve the feat. After competing in the NCAA and U.S. National Championships he was once again chosen for the 2007 World Artistic Gymnastics Championships, where he finished fourth in the all-around and helped the U.S.A. qualify a full men's team to the 2008 Summer Olympics.