| Markus Olsen Pettersen | |
| Fullname: | Markus Olsen Pettersen[1] |
| Birth Date: | 12 February 1999[2] |
| Birth Place: | Askøy, Norway |
| Height: | 1.89 m |
| Position: | Goalkeeper |
| Youthyears1: | 2009–2013 |
| Youthclubs2: | Brann |
| Youthyears2: | 2013–2015 |
| Currentclub: | KÍ |
| Clubnumber: | 1 |
| Years1: | 2016–2023 |
| Clubs1: | Brann |
| Caps1: | 12 |
| Goals1: | 0 |
| Years2: | 2019 |
| Clubs2: | → Nest-Sotra (loan) |
| Caps2: | 0 |
| Goals2: | 0 |
| Years3: | 2023– |
| Clubs3: | KÍ |
| Caps3: | 16 |
| Goals3: | 0 |
| Nationalyears1: | 2014 |
| Nationalteam1: | Norway U-15 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2015–2016 |
| Nationalteam2: | Norway U-16 |
| Nationalcaps2: | 9 |
| Nationalgoals2: | 0 |
| Nationalyears3: | 2016 |
| Nationalteam3: | Norway U-17 |
| Nationalcaps3: | 1 |
| Nationalgoals3: | 0 |
| Nationalyears4: | 2018– |
| Nationalteam4: | Norway U-19 |
| Nationalcaps4: | 9 |
| Nationalgoals4: | 0 |
| Club-Update: | 10 November 2023 |
| Nationalteam-Update: | 22 January 2019 |
Markus Olsen Pettersen (born 12 February 1999) is a Norwegian footballer who plays as a goalkeeper for KÍ.[3]
On 14 January 2019, Nest-Sotra signed Pettersen from SK Brann on a season-long loan deal.[4]