Here is a list of the 31 biggest subreddits, ranked by number of subscribers (list updated in 2021):
| Rank | Subscribers | |
| 1 | /r/announcements | 80,972,327 |
| 2 | /r/funny | 34,942,903 |
| 3 | /r/AskReddit | 30,987,366 |
| 4 | /r/gaming | 29,099,784 |
| 5 | /r/aww | 27,792,097 |
| 6 | /r/Music | 26,758,361 |
| 7 | /r/pics | 26,482,511 |
| 8 | /r/science | 25,820,102 |
| 9 | /r/worldnews | 25,609,819 |
| 10 | /r/videos | 24,642,802 |
| 11 | /r/todayilearned | 24,500,738 |
| 12 | /r/movies | 24,414,252 |
| 13 | /r/news | 22,551,097 |
| 14 | /r/Showerthoughts | 21,622,523 |
| 15 | /r/EarthPorn | 20,815,057 |
| 16 | /r/gifs | 20,707,631 |
| 17 | /r/IAmA | 20,696,773 |
| 18 | /r/food | 20,631,790 |
| 19 | /r/askscience | 20,217,290 |
| 20 | /r/Jokes | 19,882,857 |
| 21 | /r/LifeProTips | 18,933,482 |
| 22 | /r/explainlikeimfive | 18,905,576 |
| 23 | /r/Art | 18,891,054 |
| 24 | /r/books | 18,847,275 |
| 25 | /r/mildlyinteresting | 18,479,815 |
| 26 | /r/nottheonion | 18,481,767 |
| 27 | /r/DIY | 18,416,881 |
| 28 | /r/sports | 18,383,761 |
| 29 | /r/blog | 17,983,596 |
| 30 | /r/space | 17,856,839 |
| 31 | /r/gadgets | 17,795,689 |
That concludes the list of the 31 biggest subreddits.
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