| Birth Date: | 7 November 1893 |
| Birth Place: | Norrköping, Östergötland, Sweden |
| Death Date: | 18 June 1934 (aged 40) |
| Death Place: | Värmdö, Stockholm, Sweden |
| Sport: | Football |
| Club: | IFK Norrköping |
| Show-Medals: | yes |
Ivar Samuel "Iffa-Sven" Svensson (sometimes spelled Iwar Swensson; 7 November 1893 – 18 June 1934) was a Swedish football (soccer) player who competed in the 1912 Summer Olympics. He played as forward one match in the main tournament as well as one match in the consolation tournament.[1] He scored two goals in the main tournament.[2]