Movies & TV
Top Documentary Movies & Series subreddits
The largest, fastest growing and most active subreddits about Documentary Movies & Series, measured every month.
By KissMyPostData for October 2026
Short answer
27 Documentary Movies & Series subreddits have more than 10,000 members, and 46 have more than 1,000. The largest is r/Documentaries with 20.4 million members. Over the last 12 months r/LouisTheroux grew fastest (+48%) and r/Documentaries gained the most members (+69,939). The median Documentary Movies & Series subreddit with 10,000+ members grew +5.9% over 12 months (14 subreddits with a known growth), against +15% across all subreddits that size.
Largest Documentary Movies & Series subreddits
| # | Subreddit | Members | 12-mo growth | Commenters / mo |
|---|---|---|---|---|
| 1 | 20.36M | +0.3% | 2,487 | |
| 2 | 1.99M | +0.8% | 928 | |
| 3 | 644,848 | +3.3% | 4,636 | |
| 4 | 120,230 | +20% | 1,781 | |
| 5 | 101,335 | +1.2% | 44 | |
| 6 | 96,945 | +1.1% | 1 | |
| 7 | 64,685 | +48% | 304 | |
| 8 | 61,580 | +10% | 674 | |
| 9 | 53,169 | +16% | 638 | |
| 10 | 36,619 | +8.5% | 23 | |
| 11 | 31,213 | +0.5% | 4 | |
| 12 | 30,580 | +41% | 489 | |
| 13 | 29,983 | +9.3% | 135 | |
| 14 | 27,376 | – | 569 | |
| 15 | 22,187 | – | 792 | |
| 16 | 21,026 | – | 172 | |
| 17 | 20,932 | +3.0% | 18 | |
| 18 | 19,092 | – | 336 | |
| 19 | 18,811 | – | 125 | |
| 20 | 18,139 | – | 87 | |
| 21 | 15,831 | – | 12 | |
| 22 | 14,248 | – | 62 | |
| 23 | 12,759 | – | 131 | |
| 24 | 12,530 | – | 167 | |
| 25 | 12,414 | – | 279 |
Fastest growing Documentary Movies & Series subreddits
Member growth over 12 months, among subreddits that had at least 18,251 members a year ago.
| # | Subreddit | 12-mo growth | Members gained | Members | Commenters / mo |
|---|---|---|---|---|---|
| 1 | +48% | +20,972 | 64,685 | 304 | |
| 2 | +41% | +8,966 | 30,580 | 489 | |
| 3 | +20% | +19,908 | 120,230 | 1,781 | |
| 4 | +16% | +7,504 | 53,169 | 638 | |
| 5 | +10% | +5,791 | 61,580 | 674 | |
| 6 | +9.3% | +2,550 | 29,983 | 135 | |
| 7 | +8.5% | +2,862 | 36,619 | 23 | |
| 8 | +3.3% | +20,548 | 644,848 | 4,636 | |
| 9 | +3.0% | +617 | 20,932 | 18 | |
| 10 | +1.2% | +1,159 | 101,335 | 44 | |
| 11 | +1.1% | +1,029 | 96,945 | 1 | |
| 12 | +0.8% | +15,934 | 1.99M | 928 | |
| 13 | +0.5% | +146 | 31,213 | 4 | |
| 14 | +0.3% | +69,939 | 20.36M | 2,487 |
Most members gained
| # | Subreddit | Members gained | 12-mo growth | Members | Commenters / mo |
|---|---|---|---|---|---|
| 1 | +69,939 | +0.3% | 20.36M | 2,487 | |
| 2 | +20,972 | +48% | 64,685 | 304 | |
| 3 | +20,548 | +3.3% | 644,848 | 4,636 | |
| 4 | +19,908 | +20% | 120,230 | 1,781 | |
| 5 | +15,934 | +0.8% | 1.99M | 928 | |
| 6 | +8,966 | +41% | 30,580 | 489 | |
| 7 | +7,504 | +16% | 53,169 | 638 | |
| 8 | +5,791 | +10% | 61,580 | 674 | |
| 9 | +2,862 | +8.5% | 36,619 | 23 | |
| 10 | +2,550 | +9.3% | 29,983 | 135 | |
| 11 | +1,159 | +1.2% | 101,335 | 44 | |
| 12 | +1,029 | +1.1% | 96,945 | 1 | |
| 13 | +617 | +3.0% | 20,932 | 18 | |
| 14 | +146 | +0.5% | 31,213 | 4 |
Most active Documentary Movies & Series subreddits
People who comment in a month, the average of the three months ending September 2026.
| # | Subreddit | Commenters / mo | Posts / mo | Members |
|---|---|---|---|---|
| 1 | 4,636 | 319 | 644,848 | |
| 2 | 2,487 | 470 | 20.36M | |
| 3 | 1,781 | 96 | 120,230 | |
| 4 | 1,117 | 216 | 4,637 | |
| 5 | 928 | 321 | 1.99M | |
| 6 | 792 | 299 | 22,187 | |
| 7 | 674 | 131 | 61,580 | |
| 8 | 638 | 125 | 53,169 | |
| 9 | 569 | 63 | 27,376 | |
| 10 | 489 | 40 | 30,580 | |
| 11 | 336 | 166 | 19,092 | |
| 12 | 304 | 18 | 64,685 | |
| 13 | 279 | 35 | 12,414 | |
| 14 | 172 | 17 | 21,026 | |
| 15 | 167 | 18 | 12,530 | |
| 16 | 144 | 42 | 5,383 | |
| 17 | 135 | 13 | 29,983 | |
| 18 | 131 | 30 | 12,759 | |
| 19 | 125 | 26 | 18,811 | |
| 20 | 87 | 9 | 18,139 | |
| 21 | 83 | 19 | 8,399 | |
| 22 | 62 | 9 | 14,248 | |
| 23 | 44 | 6 | 101,335 | |
| 24 | 35 | 4 | 8,004 | |
| 25 | 31 | 12 | 4,753 |
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How these lists are made
- Members are the member counts measured in October 2026.
- Activity (commenters and posts per month) is the average of the three months ending September 2026. Posts by known bots are not counted.
- 12-month growth compares members now with members a year earlier. A subreddit is ranked by growth only if it already had at least 18,251 members a year ago (the median for subreddits with a known growth), so brand-new communities don't top the list from a base of zero. Subreddits with more monthly active users than 0.808 per member, a sign of inflated activity, are left out of the growth and activity lists.
- NSFW communities are excluded: those Reddit marks as 18+, those where most posts are NSFW, and the Adult Content topic.
- Topics follow Reddit's own community categories.
- The lists are rebuilt every month. Each list shows the top 25 (100 for the largest subreddits overall). Download all lists as CSV (free to reuse under CC BY 4.0, with a link to this page).
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