2018 Toppserien
The 2018 Toppserien was the 35th season of the highest women's football league in Norway. LSK Kvinner entered the season as the defending champions.
LSK Kvinner won their fifth consecutive title with five matchdays to spare.
Teams
| Team | Home city | Home ground | In Toppserien since | First appearance | Seasons |
| Arna-Bjørnar | Ytre Arna | Arna Idrettspark | 2006 | 2001 | 17 |
| Avaldsnes | Avaldsnes | Avaldsnes Idrettssenter | 2013 | 2013 | 6 |
| Grand Bodø | Bodø | Aspmyra Stadion | 2017 | 1987 | 11 |
| Klepp | Kleppe | Klepp Stadion | 1987 | 1987 | 32 |
| Kolbotn | Kolbotn | Sofiemyr | 1995 | 1995 | 24 |
| LSK Kvinner | Lillestrøm | LSK-Hallen | 1987 | 1987 | 32 |
| Lyn | Oslo | Kringsjå kunstgress | 2018 | 2018 | 1 |
| Røa | Røa | Røa kunstgress | 2000 | 2000 | 19 |
| Sandviken | Bergen | Stemmemyren | 2015 | 1987 | 25 |
| Stabæk | Bærum | Nadderud Stadion | 2009 | 2009 | 10 |
| Trondheims-Ørn | Trondheim | DnB Nor Arena | 1987 | 1987 | 32 |
| Vålerenga | Oslo | Vallhall Arena | 2012 | 2012 | 7 |