Here is a list of the 31 biggest subreddits, ranked by number of subscribers:
| Rank | Subscribers | |
| 1 | /r/announcements | 58,592,246 |
| 2 | /r/funny | 30,781,470 |
| 3 | /r/AskReddit | 28,134,498 |
| 4 | /r/gaming | 26,438,597 |
| 5 | /r/aww | 24,993,372 |
| 6 | /r/pics | 24,758,206 |
| 7 | /r/science | 24,128,597 |
| 8 | /r/worldnews | 24,110,664 |
| 9 | /r/Music | 23,851,060 |
| 10 | /r/videos | 22,983,127 |
| 11 | /r/movies | 22,971,864 |
| 12 | /r/todayilearned | 22,889,395 |
| 13 | /r/news | 20,766,143 |
| 14 | /r/Showerthoughts | 20,131,633 |
| 15 | /r/IAmA | 20,102,833 |
| 16 | /r/gifs | 19,966,692 |
| 17 | /r/EarthPorn | 19,861,467 |
| 18 | /r/askscience | 19,132,557 |
| 19 | /r/food | 18,715,463 |
| 20 | /r/Jokes | 18,472,547 |
| 21 | /r/explainlikeimfive | 18,055,751 |
| 22 | /r/books | 17,993,535 |
| 23 | /r/LifeProTips | 17,871,711 |
| 24 | /r/blog | 17,707,739 |
| 25 | /r/Art | 17,712,794 |
| 26 | /r/mildlyinteresting | 17,547,755 |
| 27 | /r/DIY | 17,467,690 |
| 28 | /r/sports | 17,191,911 |
| 29 | /r/nottheonion | 16,954,456 |
| 30 | /r/space | 16,852,145 |
| 31 | /r/gadgets | 16,801,555 |
That concludes the list of the 31 biggest subreddits.