| Rank | Board name and description | Posts | Members |
| 1 | NASIOC Forums Forums of the North American Subaru Impreza Owners Club | 27917766 | 220754 |
| 2 | Scoobynet Subaru Impreza owners community | 8775796 | 106219 |
| 3 | I-Club Subaru owners community | 2751538 | 37183 |
| 4 | IWSTI Subaru Impreza STI owners community | 2665438 | 50859 |
| 5 | Club WRX Subaru Impreza owners community | 2249922 | 60097 |
| 6 | WebClub Subaru Subaru owners community (in french) | 1588588 | 10576 |
| 7 | Ultimate Subaru Subaru message board | 846845 | 27976 |