| Kristian Arnstad | |
| Fullname: | Kristian Fredrik Malt Arnstad |
| Birth Date: | 7 September 2003 |
| Birth Place: | Oslo, Norway |
| Height: | 1.75 m |
| Position: | Midfielder |
| Currentclub: | Anderlecht |
| Clubnumber: | 61 |
| Youthyears1: | 2014–2016 |
| Youthclubs1: | Heming |
| Youthyears2: | 2016–2019 |
| Youthclubs2: | Stabæk |
| Youthyears3: | 2019–2020 |
| Youthclubs3: | Anderlecht |
| Years1: | 2020– |
| Caps1: | 42 |
| Goals1: | 1 |
| Nationalyears1: | 2018 |
| Nationalcaps1: | 7 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2019 |
| Nationalcaps2: | 15 |
| Nationalgoals2: | 5 |
| Nationalyears3: | 2021 |
| Nationalcaps3: | 8 |
| Nationalgoals3: | 1 |
| Nationalyears4: | 2022 |
| Nationalcaps4: | 1 |
| Nationalgoals4: | 0 |
| Nationalyears5: | 2022– |
| Nationalcaps5: | 11 |
| Nationalgoals5: | 4 |
| Ntupdate: | 23 November 2022 |
| Club-Update: | 5 November 2023 |
Kristian Fredrik Malt Arnstad (born 7 September 2003) is a Norwegian professional footballer who plays as a midfielder for Anderlecht in the Belgian First Division A.
A youth product of Heming, Arnstad signed with Anderlecht on 15 September 2019.[1] Arnstad made his professional debut with Anderlecht in a 3-0 Belgian First Division A loss to Club Brugge KV on 4 October 2020.[2]