| Kentarō Kawatsu | |
| Native Name: | 河津憲太郎 |
| Native Name Lang: | Ja |
| Nationality: | Japanese |
| Strokes: | backstroke |
| Birth Date: | 26 September 1915 |
| Birth Place: | Hiroshima, Japan |
| Show-Medals: | yes |
was a Japanese swimmer who competed at the 1932 Summer Olympics.
Kawatsu was a native of Hiroshima City, where his father was a physical education instructor at the predecessor of Hiroshima University. In 1930, while still in middle school, Kawatsu set a new Japan record of 33.2 seconds for the 50-meter backstroke. In 1932, while a student at Meiji University, he was selected for the Japanese Olympic team to the Los Angeles Olympics. The team took the gold, silver and bronze medals in the 100 meter backstroke event, with Kawatsu winning the bronze medal.
He subsequently participated in the 1934 Far Eastern Games held in Manila.
Kawatsu committed suicide by burning himself to death on March 23, 1970.