| Birth Date: | 4 March 1893 |
| Birth Place: | Stockholm, Sweden |
| Death Date: | 12 July 1971 (aged 78) |
| Death Place: | Stockholm, Sweden |
| Sport: | Water polo |
| Club: | SK Neptun, Stockholm |
| Show-Medals: | yes |
Cletus Erik Thule Andersson (4 March 1893 - 12 July 1971) was a Swedish water polo player.[1] Together with his elder brother Vilhelm he was part of the Swedish team that finished fourth at the 1924 Summer Olympics. Cletus played all six matches and scored four goals.[2]