Campbell Stewart (born 12 May 1998) is a New Zealand professional track and road cyclist, who currently rides for UCI WorldTeam Team Jayco–AlUla. He represented his country at the 2018 Commonwealth Games, gaining two silver medals in the scratch race and points race, and the 2020 Summer Olympics, gaining a silver medal in the omnium.

Stewart was born in Palmerston North in 1998, and attended Palmerston North Boys' High School.

Stewart rode for WIGGINS in 2018.

At the 2020 Summer Olympics in Tokyo, Stewart competed in the team pursuit event. After fellow rider Aaron Gate crashed in the team pursuit bronze medal race and fractured his collarbone, Stewart took Gate's places in the omnium and madison events.