Oliver Haig (born 3 January 2002) is a New Zealand rugby union player, who plays for the and . His preferred position is flanker.
Haig attended Otago Boys' High School and represented New Zealand U20 in 2022, with his appearances earning him a contract for both and the .
Haig debuted for in 2022, and was called into the squad as a late replacement ahead of Round 4 of the 2023 Super Rugby Pacific season, debuting against the . He was again announced in the side for the 2023 Bunnings NPC.