| Competition: | Women's Premiership (Northern Ireland) |
| Continentalcup1: | Women's Champions League |
| Continentalcup1 Qualifiers: | Glentoran |
| Matches: | 60 |
| Prevseason: | 2020 |
| Nextseason: | 2022 |
The 2021 Northern Irish Women's Premiership, was the 18th season of the top-tier women's football league in Northern Ireland. Glentoran were the defending champions.[1]
Glentoran won their ninth league title, and second consecutive title, after a 3–2 home victory over Cliftonville in the penultimate round of fixtures on 21 September 2021.[2]
For the 2021 season, no team was relegated as the league was to increase to eight teams for the 2022 season with a view to making the league professional in the 2023 season.[3]
The following teams made up the 2021 season.
Teams are listed in alphabetical order.
| Team | Location | Stadium | Capacity | |
|---|---|---|---|---|
| Cliftonville | Solitude | 2,530 | ||
| Crusaders Strikers | Seaview | 3,383 | ||
| Derry City | Derry | Brandywell Stadium | 3,700 | |
| Glentoran | The Oval | 26,556 | ||
| Linfield | New Midgley Park | n/a | ||
| Sion Swifts | Strabane | Melvin Sports Complex | n/a |