Ole Martin Halvorsen (born 11 February 2000) is a Norwegian sport shooter.

[1][2] In June 2023 Halvorsen competed at the 2023 European Games, along with Simon Claussen and Jon-Hermann Hegg.

The Norwegian team qualified for the finals in 50 metre rifle, where they placed fourth, defeated by Serbia in the bronze medal match.

[3] Competing at the 2023 ISSF World Shooting Championships in Baku, Halvorsen won the team gold medal in 50 m rifle prone, along with Jon-Hermann Hegg and Henrik Larsen.

[6] At the 2024 ISSF World Cup event in Munich in June, he placed first in 50 m rifle match, ahead of István Péni and Jon-Hermann Hegg.