| Kaj Hansen | |
| Fullname: | Kaj Hansen |
| Birth Date: | 16 August 1940 |
| Birth Place: | Copenhagen, Denmark |
| Death Place: | Sweden |
| Position: | Defender |
| Youthclubs1: | Boldklubben Frem |
| Years1: | 1960–1967 |
| Years2: | 1968 |
| Clubs4: | Fagersta |
| Caps1: | 193 |
| Goals1: | 20 |
| Nationalyears1: | 1961–1962 |
| Nationalyears2: | 1963–1967 |
| Nationalteam2: | Denmark |
| Nationalcaps1: | 5 |
| Nationalcaps2: | 7 |
| Nationalgoals1: | 0 |
| Nationalgoals2: | 0 |
Kaj Hansen (16 August 1940 – 2 July 2009) was a Danish former footballer, who spent the majority of his career with Boldklubben Frem. He played seven games for the Denmark national football team, and represented his country at the 1964 UEFA European Football Championship. He was born in Copenhagen and died in Sweden.