| Marthine Østenstad | |
| Height: | 178 cm[1] |
| Birth Date: | 18 March 2001 |
| Position: | Defender |
| Youthyears1: | 2014 |
| Youthclubs1: | Madla |
| Youthyears2: | 2015–2018 |
| Youthclubs2: | Viking |
| Youthyears3: | 2019 |
| Youthclubs3: | Klepp |
| Currentclub: | Brann |
| Clubnumber: | 15 |
| Years1: | 2017–2018 |
| Clubs1: | Viking |
| Caps1: | 13 |
| Goals1: | 8 |
| Years2: | 2018–2020 |
| Clubs2: | Klepp |
| Caps2: | 45 |
| Goals2: | 4 |
| Years3: | 2018 |
| Clubs3: | Klepp 2 |
| Caps3: | 4 |
| Goals3: | 0 |
| Years4: | 2021– |
| Clubs4: | Brann |
| Caps4: | 114 |
| Goals4: | 13 |
| Nationalteam1: | Norway U15 |
| Nationalyears1: | 2016 |
| Nationalcaps1: | 3 |
| Nationalgoals1: | 0 |
| Nationalteam2: | Norway U16 |
| Nationalyears2: | 2017 |
| Nationalcaps2: | 11 |
| Nationalgoals2: | 2 |
| Nationalteam3: | Norway U17 |
| Nationalyears3: | 2018 |
| Nationalcaps3: | 7 |
| Nationalgoals3: | 1 |
| Nationalteam4: | Norway U19 |
| Nationalyears4: | 2018–2020 |
| Nationalcaps4: | 20 |
| Nationalgoals4: | 1 |
| Nationalteam5: | Norway U23 |
| Nationalyears5: | 2021–2023 |
| Nationalcaps5: | 9 |
| Nationalgoals5: | 0 |
| Nationalteam6: | Norway |
| Nationalyears6: | 2023– |
| Nationalcaps6: | 2 |
| Nationalgoals6: | 0 |
| Club-Update: | 20 October 2024 |
| Nationalteam-Update: | 20 October 2024 |
Marthine Østenstad (born 18 March 2001) is a Norwegian professional footballer who plays as a defender for and captains Toppserien club Brann. She has also been capped for Norway, following in the footsteps of her father Egil Østenstad.
| Club | Season | League | Norwegian Cup | Champions League | Total | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Division | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | |||
| Viking | 2017 | Third Division | 7 | 5 | — | — | 7 | 5 | |||
| 2018 | Third Division | 6 | 3 | — | — | 6 | 3 | ||||
| Total | 13 | 8 | — | — | 13 | 8 | |||||
| Klepp 2 | 2018 | Second Division | 4 | 0 | — | — | 4 | 0 | |||
| Klepp | 2018 | Toppserien | 4 | 0 | 0 | 0 | — | 4 | 0 | ||
| 2019 | Toppserien | 21 | 1 | 2 | 1 | — | 23 | 2 | |||
| 2020 | Toppserien | 18 | 2 | 0 | 0 | — | 18 | 2 | |||
| Total | 43 | 3 | 2 | 1 | — | 45 | 4 | ||||
| Brann | 2021 | Toppserien | 18 | 1 | 5 | 1 | — | 23 | 2 | ||
| 2022 | Toppserien | 19 | 1 | 3 | 0 | 3 | 0 | 25 | 1 | ||
| 2023 | Toppserien | 26 | 3 | 2 | 1 | 8 | 1 | 36 | 5 | ||
| 2024 | Toppserien | 24 | 4 | 4 | 1 | 2 | 0 | 30 | 5 | ||
| Total | 87 | 9 | 14 | 3 | 13 | 1 | 114 | 13 | |||
| Career total | 147 | 20 | 16 | 4 | 13 | 1 | 176 | 25 | |||