| Brett Codlin | |
| Birth Name: | Brett William Codlin |
| Birth Date: | 29 November 1956 |
| Birth Place: | Pukekohe, New Zealand |
| Ru Position: | Fullback |
| Height: | 1.850NaN0 |
| Weight: | 87kg (192lb) |
| Repcaps1: | 3 |
| Reppoints1: | 23 |
| Repyears1: | 1980 |
| Province1: | Canterbury |
| Province2: | Counties |
| Provinceyears1: | 1979 |
| Provinceyears2: | 1980–84 |
| Provinceapps1: | 4 |
| Provinceapps2: | 28 |
| School: | King's College |
Brett William Codlin (born 29 November 1956) is a former New Zealand rugby union player. A full-back, Codlin represented Canterbury and Counties at a provincial level, and was a member of the New Zealand national side, the All Blacks, in 1980. He played 13 matches for the All Blacks including three internationals.[1]