The 2017–18 Isle of Man League was the 109th season of the Isle of Man Football League on the Isle of Man. St Georges were the defending champion, having won the championship the previous season.
| Team | Location | Stadium | Capacity | |
|---|---|---|---|---|
| Braddan | Douglas | Cronkbourne Football Ground | ||
| Colby | Colby | Station Road | ||
| Corinthians | Douglas | Ballafletcher Sports Ground | ||
| Douglas Athletic | Douglas | Groves Road | ||
| Douglas HSOB | Onchan | Blackberry Lane | ||
| Douglas Royal | Douglas | Ballafletcher Sports Ground | ||
| Laxey | Laxey | Laxey Football Ground | ||
| Peel | Peel A.F.C Football Ground | |||
| Ramsey | Ramsey | Ballacloan Stadium | ||
| Rushen United | Port Erin | Croit Lowey | ||
| St Georges | Douglas | The Campsite | ||
| St Johns United | St John's Football Ground | |||
| St Marys | Douglas | The Bowl | 3,000[1] |
| Team | Location | Stadium | Capacity | |
|---|---|---|---|---|
| Ayre United | Andreas | Andreas Playing Fields | ||
| Castletown Metropolitan | Castletown | Castletown Football Stadium | ||
| Douglas and District | Douglas | Nobles Park | ||
| Foxdale | Billy Goat Park | |||
| Governors Athletic | Douglas | Bemahague School 3G Pitch | ||
| Gymnasium | Douglas | Tromode Park | ||
| Malew | Ballasalla | Malew Football Ground | ||
| Marown | Memorial Playing Fields | |||
| Michael United | Kirk Michael | Lough Ny Magher | ||
| Onchan | Nivison Stadium | |||
| Pulrose United | Douglas | Groves Road Stadium | ||
| Ramsey YCOB | Ramsey | Scoill Ree Gorree | ||
| Union Mills | Union Mills | Garey Mooar |