The following is a list of known active SMF forums which boast a post count of over 500,000. The list is still under construction and will be expanded with more large forums over time. "As of (date)" indicates the date these statistics were last updated for a specific board.
| Name | Posts | Topics | Members | Update | Description | |
|---|---|---|---|---|---|---|
| Bitcointalk | 54,334,473 | 1,243,012 | 2,787,426 | 2020/05 | ||
| Red and White Kop | 16,195,158 | 176,279 | 43,759 | 2020/05 | ||
| Elliquiy Adult Role Playing | 16,024,878 | 263,182 | 46,036 | 2020/05 | ||
| Burek | 12,577,406 | 671,768 | 5,007,475 | 2020/05 | ||
| Hogville | 10,869,048 | 423,474 | 24,832 | 2020/05 | ||
| Talk Elections | 6,422,945 | 289,120 | 5,218 | 2020/05 | Discussions about elections, political cartography, and politics | |
| Fertility friends | 5,230,920 | 2015/01 | ||||
| Getbig Forums | 5,082,924 | 2015/01 | ||||
| Italian Subs Addicted Forum | 4,811,395 | 103,141 | 399,269 | 2014/11 | ||
| Biology Discussion Forums | 4,618,839 | 1,721,291 | 302,000 | 2019/08 | Free homework help | |
| Crafster.org | 4,616,395 | 2015/01 | ||||
| Astronomy.ru | 4,196,625 | 88,115 | 33,299 | 2019/02 | Russian, astronomy | |
| Simple Machines Forum | 3,590,178 | 433,455 | 350,074 | 2015/04 | SMF powered forum home of SMF, for support with SMF and a general SMF community for users of SMF. | |
| Fórum SCP | 3,351,783 | 20,959 | 5,398 | 2014/12 | Fans of Sporting Club of Portugal | |
| MoparScape | 3,263,271 | 480,368 | 524,575 | 2015/01 | ||
| Inthe00s.com | 3,192,868 | 2015/01 | ||||
| Hommaforum.org | 3,005,786 | 59,342 | 11,267 | 2020/07 | Finnish political discussion forum | |
| BPDFamily.com | 2,911,688 | 282,082 | 70,130 | 2015/01 | Support group for families having a mentally ill family member | |
| FearlessFriday.com | 2,733,851 | 97,883 | 13,306 | 2020/05 | ||
| 40KOnline | 2,633,793 | 201,324 | 40,375 | 2013/05 | Fans of Warhammer 40,000 game | |
| KBoards | 2,517,538 | 131,668 | 74,636 | 2014/02 | Kindle readers and authors of ebooks | |
| Bay12 Games Forum | 2,122,186 | 135,497 | 41,446 | 2014/07 | Developers of Dwarf Fortress game. | |
| BenzoBuddies | 2,000,747 | 141,900 | 21,856 | 2016/03 | BenzoBuddies: an inclusive, nonjudgmental mutual-support environment for all who wish to withdraw from benzodiazepines. | |
| Chevy Avalanche Fan Club | 1,935,658 | 116,115 | 49,335 | 2013/05 | ||
| AvPGalaxy | 1,934,700 | 29,086 | 18,436 | 2015/03 | Alien vs Predator forum | |
| Multitool Forum | 1,873,911 | 75,565 | 6,386 | 2019/02 | Intelligent tool discussion and info for the collector, enthusiast and user. | |
| MSI Global English Forum | 1,516,206 | 218,558 | 754,853 | 2020/05 | MSI Support forums | |
| geekhack | 1,485,674 | 58,148 | 41,874 | 2015/04 | Keyboard Modifications and Accessories | |
| Hondenvrienden | 1,431,046 | 55,226 | 7,751 | 2014/03 | Belgian biggest dog forum | |
| Fractured Frugal Friends | 1,334,426 | 110,510 | 759 | 2020/05 | ||
| EEVBlog Electronics | 1,320,826 | 87,084 | 40,615 | 2017/11 | EEVBlog Electronics Community | |
| NASA Spaceflight | 1,296,427 | 30,370 | 28,713 | 2015/04 | An online NASA community | |
| Hunting Washington | 1,290,743 | 139,321 | 20,088 | 2016/02 | Outdoor sports enthusiasts | |
| Bass Fishing Forum | 1,124,972 | 2015/01 | ||||
| Avast! WEBforum | 1,113,332 | 128,618 | 675,459 | 2015/04 | Online community of (anti-virus) security firm Avast! | |
| Forum Mustang | 1,087,068 | 42,450 | 9,745 | 2018/03 | French forum about Ford Mustang cars | |
| Marlin Crawler | 1,022,342 | 70,601 | 20,769 | 2016/01 | Marlin Crawler is a vendor of car parts for Toyota rock crawlers | |
| Hulpverlenings Forum | 979,005 | 7,185 | 39,368 | 2016/01 | Dutch site about emergency services | |
| NSNO Everton Forum | 1,469,528 | 44,733 | 4,565 | 2018/10 | Supporters of Everton Football Club | |
| COMODO | 758,600 | 82,012 | 157,392 | 2015/04 | Community forum of COMODO, a security firm providing security solutions such as SSL certificates. | |
| Perusing The Shelves | 633,716 | 50,826 | 190,941 | 2016/08 | Online community for Readers | |
| TheBeerSpot | 608,132 | 14,210 | 1,600 | 2014/02 | A craft beer community. | |
| Brandweerforum | 545,804 | 20,330 | 2.514 | 2013/06 | Dutch site about fire fighters | |
| Naked Science Discussion Forum | 533,438 | 46,909 | 17,329 | 2020/05 |
