| Birth Date: | 2 June 1890 |
| Birth Place: | Gävle, Sweden |
| Death Place: | Gävle, Sweden |
| Position: | Right wing |
| Ntl Team: | SWE |
| Career Start: | 1919 |
| Career End: | 1920 |
Hans-Jacob Emanuel "Knubben" Mattsson (2 June 1890 – 1 December 1980) was a Swedish ice hockey player who competed in the 1920 Summer Olympics.[1] In 1920 he was a member of the Swedish ice hockey team which finished fourth in the Summer Olympics tournament. He played one match.[2]