| Rank | Board name and description | Posts | Members |
| 1 | NASIOC Forums Forums of the North American Subaru Impreza Owners Club | 35293395 | 299599 |
| 2 | Scoobynet Subaru Impreza owners community | 10181097 | 123673 |
| 3 | I-Club Subaru owners community | 3185407 | 43697 |
| 4 | IWSTI Subaru Impreza STI owners community | 3118537 | 74829 |
| 5 | Club WRX Subaru Impreza owners community | 2392001 | 73838 |
| 6 | WebClub Subaru Subaru owners community (in french) | 1607784 | 10739 |
| 7 | Ultimate Subaru Subaru message board | 1041391 | 34087 |