The 2021 GK Championships were held on May 22 in Laugardalur, Iceland.
Senior All-Around Results
| Rank | Athlete | Club | VT | UB | BB | FX | AA |
| 1 | Hildur Gudmundsdottir | Gerpla | 13.200 | 9.700 | 12.533 | 12.200 | 47.633 |
| 2 | Soley Gudmundsdottir | Grotta | 13.266 | 9.566 | 10.400 | 10.933 | 44.165 |
| 3 | Ingibjörg Gunnarsdottir | Gerpla | 12.700 | 8.866 | 10.666 | 10.366 | 42.598 |
| 4 | Maria Jonsdottir | FIMAK | 12.366 | 4.900 | 9.300 | 10.800 | 37.366 |
| 5 | Kristin Jonsdottir | Gerpla | 12.966 | 8.300 | 10.033 | —— | 31.299 |
Senior All-Around Results
| Rank | Athlete | Club | VT | UB | BB | FX | AA |
| 1 | Freyja Hannesdottir | Grotta | 12.266 | 9.633 | 9.866 | 12.200 | 43.965 |
| 2 | Dagny Axelsdottir | Gerpla | 11.900 | 9.200 | 9.566 | 10.433 | 41.099 |
| 3 | Emma Kristinsdottir | Stjarnan | 11.400 | 8.200 | 9.766 | 11.233 | 40.599 |
| 4 | Thoranna Sveinsdottir | Stjarnan | 11.200 | 8.233 | 8.966 | 10.200 | 38.599 |
| 5 | Lilja Gunnarsdottir | Fjölnir | 10.633 | 7.533 | 8.533 | 10.433 | 37.132 |
| 6 | Viktoria Benonysdottir | Fylkir | 11.700 | 5.566 | 8.033 | 10.633 | 35.932 |
| 7 | Svanhildur Hlynsdottir | Armann | —— | 10.866 | 9.033 | —— | 19.899 |
| 8 | Ragnhildur Gottskalksdottir | Grotta | —— | 7.600 | 9.933 | —— | 17.533 |
| 9 | Svanhildur Gunnarsdottir | Grotta | —— | 7.866 | —— | —— | 7.866 |
