John Olav Norheim (born 5 April 1995) is a Norwegian professional footballer who plays as a defender for Norwegian First Division side Start.
Norheim started his career in Fløy, and made his senior debut in 2012. In 2014, he joined IK Start as a youth prospect. He then made his Tippeligaen debut in May 2015 against Molde.
In 2015, he was loaned out to Nest-Sotra Fotball. On 7 January 2016 he was loaned to KFUM Oslo. Ahead of the 2017 season he returned to Fløy.
Norheim signed with Strømmen IF for one year on 27 December 2018.