| Rank | Board name and description | Posts | Members |
| 1 | NASIOC Forums Forums of the North American Subaru Impreza Owners Club | 38987711 | 349989 |
| 2 | Scoobynet Subaru Impreza owners community | 10812778 | 132879 |
| 3 | IWSTI Subaru Impreza STI owners community | 3475537 | 88273 |
| 4 | I-Club Subaru owners community | 3396951 | 47979 |
| 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 | 1120779 | 46754 |