| Period | Manager | Country | born |
| 01/01/2022 - 10/02/2025 | Úlfur Arnar Jökulsson |
|
16/12/1983 |
| 01/01/2019 - 30/06/2021 | Ásmundur Arnarsson |
|
14/03/1972 |
| 01/01/2018 - 31/12/2018 | Ólafur Snorrason |
|
22/04/1982 |
| 01/01/2012 - 31/12/2017 | Ágúst Gylfason |
|
01/08/1971 |
| 01/01/2005 - 31/12/2011 | Ásmundur Arnarsson |
|
14/03/1972 |
![Fjölnir Reykjavík [U17]](https://s.hs-data.com/bilder/wappen/mini/29570.gif?fallback=png "Fjölnir Reykjavík [U17]"){kind=small}
![Fjölnir Reykjavík [Youth]](https://s.hs-data.com/bilder/wappen/mini/26156.gif?fallback=png "Fjölnir Reykjavík [Youth]"){kind=small}