| Gustaf Josefsson | |
| Fullname: | Karl Gustaf Ragnvald Josefsson Reinsell |
| Birth Date: | 16 February 1916 |
| Birth Place: | Stockholm, Sweden |
| Death Place: | Stockholm, Sweden |
| Nationalteam1: | Sweden |
| Nationalyears1: | 1936-37 |
| Nationalcaps1: | 10 |
| Nationalgoals1: | 3 |
| Clubs1: | AIK |
Karl Gustaf Ragnvald "Niggern"[1] Josefsson-Reinsell (16 February 1916 - 16 April 1983) was a Swedish footballer.[2] He competed in the men's tournament at the 1936 Summer Olympics.[3] He was a part of the AIK team that won the 1936–37 Allsvenskan.