Kettil Karlsson (Vasa)
| Regency | February, 1464 |
| Family | Vasa |
| Predecessor | Christian I of Sweden |
| Interregnum | Charles VIII of Sweden |
| Successor | Jöns Bengtsson (Oxenstierna) |
| Date of Birth | 1433 |
| Date of Death | August 11, 1465 |
Kettil Karlsson (Vasa) (1433 – August 11, 1465) was a Swedish clergyman and regent of Sweden under the Kalmar Union from February 1464 to August 1465, interluded by a six month interregnum of king Charles VIII of Sweden. He was also Bishop of Linköping.
He was the son of Karl Kristiernsson (Vasa) och Ebba Eriksdotter (Krummedige).
| Preceded by: Charles VIII | Regent of Sweden | Succeeded by: Jöns Bengtsson (Oxenstierna) |