| Rank | Board name and description | Posts | Members |
| 1 | Doctissimo.fr French medical help and health forums | 98185241 | 1456507 |
| 2 | Bodybuilding.com Bodybuilding and fitness related forums | 44172375 | 1920622 |
| 3 | Wizaz.pl Women message board (in Polish) | 14809696 | 458847 |
| 4 | Low Carb Friends Low carb diets discussion forum | 10440338 | 89324 |
| 5 | Student Doctor Forum for students in the health care industry | 8289874 | 218050 |
| 6 | Elite Fitness Diet and fitness and bodybuilding message boards | 8031746 | 173809 |
| 7 | Low Carber Diet and low carb support message boards | 7306996 | 120899 |
| 8 | Acne.org Message Boards Acne problems discussion forum | 4884996 | 96366 |
| 9 | Dutch Bodybuilding Bodybuilding forum (in Dutch) | 4238853 | 69301 |
| 10 | Health boards Health and diseases message boards | 3840270 | 609762 |
| 11 | Baby and Bump Pregnancy forum | 3609402 | 41284 |
| 12 | Kolozzeum Forum Sports and training forums (in swedish) | 3193741 | 34031 |
| 13 | AskMen Askmen.com (online men magazine) forums | 3030653 | 34990 |
| 14 | Muscle Talk Bodybuilding and nutrition forums | 2835005 | 33600 |
| 15 | Bus web board Discussion board related to self-injury | 2743852 | 12864 |
| 16 | Three Fat Chicks Weight loss Forum | 2722308 | 85238 |
| 17 | Allnurses.com Nurses discussion forums | 2572754 | 256964 |
| 18 | Pakkotoisto Finnish bodybuilding forum | 2518292 | 49900 |
| 19 | Veggie Boards Vegetarian and vegan message boards | 2443121 | 47606 |
| 20 | Hyster Sisters Women community for issues related to GYN diseases and complications | 2346519 | 128967 |
| 21 | She Knows Pregnancy discussion and advice message boards | 2322944 | 49498 |
| 22 | Provida Weight loss and health message boards | 2273636 | 196251 |
| 23 | MiniMins Weight loss support forum | 2146773 | 27797 |
| 24 | LPSG Large Penis Support Group forums | 2113887 | 408553 |
| 25 | Wannabe Big Forums Bodybuilding message boards | 2075815 | 61445 |
| 26 | Anabolic Minds Nutritional supplements discussion forum | 2068340 | 91283 |
| 27 | Steroidology Bodybuilding and steroids discussion board | 1905087 | 109957 |
| 28 | Bodyweb.it Italian bodybuilding forums | 1897474 | 12924 |
| 29 | Cerco un Bimbo Fertility discussion forum (in Italian) | 1859176 | 32179 |
| 30 | Recover your Life Self Harm discussion and support forume viewable on the page the URL links to. | 1855221 | 10896 |
| 31 | Nedug Free medical consultation forum (in russian) | 1851089 | 15124 |
| 32 | Discuss Anything General discussion forum | 1825070 | 12320 |
| 33 | Cannabis Forums Cannabis discussion forum | 1801439 | 147049 |
| 34 | Imperium Sportu Sports message board (in polish) | 1693643 | 49847 |
| 35 | Beauty Board Beauty and welness discussion forums (in German) | 1663799 | 7826 |
| 36 | BBS zene Fitness & bodybuilding forum (in German) | 1648050 | 124209 |
| 37 | Badger and Blade Shaving and razors discussion forums | 1616951 | 20531 |
| 38 | Sober Recovery Alcoholism and Addictions help forums | 1601819 | 60342 |
| 39 | BPAL Madness! Bpal oils discussion and reviews | 1584694 | 18014 |
| 40 | Cooking Light Cooking message board | 1507640 | 51481 |
| 41 | Tour Magazin Tour Magazin discussion forum in German | 1490412 | 16828 |
| 42 | Ovusoft Parenthood and pregnancy message boards | 1462059 | 14908 |
| 43 | All Deaf Forum for the deaf and hard of hearing | 1416054 | 29134 |
| 44 | Spankmag Youth general discussion | 1404767 | 14947 |
| 45 | Lap Band Talk Lap band surgery forums | 1324256 | 76278 |
| 46 | Dimensions Forums Dimensions magazine message boards | 1289607 | 42667 |
| 47 | GeoParent Community focussed on family life, parenting and pregnancy | 1206128 | 11085 |
| 48 | Psych Central Psychotherapy and mental health forums | 1199936 | 91271 |
| 49 | Iron Magazine Body building message board | 1145303 | 16972 |
| 50 | ValueMD Medical schools forum | 1116493 | 108878 |
| 51 | Muscle forums Bodybuilding forums | 1092924 | 14145 |
| 52 | SaniHelp Health message board (in Italian) | 1050777 | 48179 |
| 53 | Basenotes Fragrances and perfumes forum | 971232 | 36030 |
| 54 | I am Tan Indoor tanning forums | 936496 | 8796 |
| 55 | Anabolex Hardcore bodybuilding forums | 874703 | 34856 |
| 56 | Abnehmen Weight loss forums | 870942 | 20026 |
| 57 | Body.se Swedish bodybuilding forums | 820387 | 25957 |
| 58 | Discuss Cooking Cooking message board | 812364 | 25252 |
| 59 | ePharmacyWatch Forum about buying prescription drugs online and telemedicine | 801347 | 128822 |
| 60 | Weed Tracker Medical marijuana forums | 756683 | 83208 |
| 61 | Mauisun Anti narcotics discussion board | 670837 | 35677 |
| 62 | Avon - discontinued General discussion message boards | 635763 | 6169 |
| 63 | Early Retirement Retired lifestyle forum | 612889 | 8951 |
| 64 | Steroid Forums steroids forum | 591465 | 122177 |
| 65 | PASS support boards Post abortion support forums | 581038 | 9889 |
| 66 | Depression Forums Mental health forums | 552035 | 34007 |
| 67 | Braintalk Communities Online patient support groups for neurology | 393834 | 63175 |