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Best Interesting Facts Subreddits (October 2026)

Looking for the right interesting facts community on Reddit? Here is the lay of the land. We checked the communities Reddit returns for “interesting” and “facts”, kept the public, safe-for-work ones with at least 25,000 members that are still posting, and ranked the 7 that remain by size. Together they have 110.7M members.

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How the interesting facts communities compare

A few giants dominate — r/todayilearned, r/mildlyinteresting and r/Damnthatsinteresting together account for 79% of the combined membership. Size and activity don't line up perfectly: r/todayilearned has the most members, but r/notinteresting gets the most new posts (about 220 a day, against 99 in r/todayilearned). Among the communities we track weekly, r/interesting grew fastest recently (+1.28%, +27.6K members since Oct 19). The oldest is r/todayilearned, founded in 2008, and every community here is more than five years old — this is a long-established corner of Reddit.

The 7 biggest interesting facts subreddits

  1. r/todayilearned 41,711,023 members · ~99 posts/day · +10.5K since Oct 19 · since 2008

    You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.

  2. r/mildlyinteresting 25,444,167 members · ~154 posts/day · +9.9K since Oct 19 · since 2012

    Aww, cripes. I didn't know I'd have to write a description. How many words is that so far, like a hundred? Soooo, yeah. Mildly interesting stuff. Stuff that interests you. Mildly. It's in the name, ffs.

  3. r/Damnthatsinteresting 20,641,117 members · ~64 posts/day · +10.3K since Oct 19 · since 2013

    For the most interesting things on the internet

  4. r/interestingasfuck 16,916,428 members · ~142 posts/day · +25.9K since Oct 19 · since 2008

    For anything truly interesting as fuck

  5. r/theydidthemath 2,453,937 members · ~37 posts/day · +6.4K since Oct 19 · since 2013

    And they said math has no real world applications

  6. r/interesting 2,172,964 members · ~88 posts/day · +27.6K since Oct 19 · since 2008

    A place to share something that the masses would find very interesting.

  7. N
    r/notinteresting ↗ 1,367,651 members · ~220 posts/day · +3.8K since Oct 19 · since 2012

    For things that are not interesting at all

What these communities upvoted this week

This week's best-received posts from a few of the communities above — a quick way to get a feel for each one.

  1. TIL Adam DeVine was hit by a cement truck at age 11, breaking every bone in his legs. He spent two weeks in a coma, underwent 26 surgeries, and used a wheelchair during recovery. …r/todayilearned · Oct 28
  2. Dropped my sugar lid causing it to chip, but the gap was perfect for the spoonr/mildlyinteresting · Oct 27
  3. The "Duck" in Avenida Place hotel, Barcelona, Spain.r/Damnthatsinteresting · Oct 23
  4. The defensive posture of a wild hamsterr/interestingasfuck · Oct 23
  5. TIL Tobey Maguire never told the producers of Spider-Man (2002) about his claustrophobia. He nearly blacked out during a plaster body cast, forcing the costume makers to alert the…r/todayilearned · Oct 23
  6. I crafted this wooden being from driftwood, roots and mossr/mildlyinteresting · Oct 26
  7. This is Spiny butterfly ray, an IUCN listed globally endangered species.r/Damnthatsinteresting · Oct 25
  8. In 2012 a UC San Diego student was left handcuffed in a holding cell for five days with no food or water, never charged, and later received a $4.1 million settlement.r/interestingasfuck · Oct 24

Choosing where to post

Competition for attention differs a lot: r/todayilearned has 41.7M members but only about 99 new posts a day — roughly one new post for every 423.5K members — while r/notinteresting gets about 220 a day, one for every 6.2K. A strong, well-made post therefore has more room to be seen in r/todayilearned; r/notinteresting is better when you want quick replies. Rule sets vary: of the communities we have rules for, r/interestingasfuck lists 12, against 6 in r/mildlyinteresting, so a post that is fine in one can be removed in another.

Big subreddits give a post the widest audience, but they also bury it quickly; the mid-sized communities on this list are usually friendlier for questions and first posts. Always read the rules in the sidebar first — each community is run by its own volunteer moderators. Our guide to searching Reddit explains how to dig through any of these communities, and the subreddit info tool gives you the stats of one we don't list.

Frequently asked questions

What is the biggest interesting facts subreddit?

r/todayilearned is the largest, with 41,711,023 members, followed by r/mildlyinteresting (25.4M) and r/Damnthatsinteresting (20.6M).

Which interesting facts subreddit is the most active?

By new posts per day, r/notinteresting leads with about 220, ahead of r/mildlyinteresting (154). Counts are averages over the last seven days.

How many interesting facts subreddits are there?

We list 7 active, safe-for-work interesting facts communities with at least 25,000 members each, 110.7M members in total (people can be in several). Reddit has many smaller ones too; our guide on searching Reddit shows how to find them.

What is the oldest interesting facts subreddit?

r/interestingasfuck, created on Apr 10, 2008.

Are these interesting facts subreddits safe for work?

Yes. Every community on this page is public and not marked 18+ by Reddit, and we filter out communities whose name or description points to adult content.

Data: Reddit's public subreddit search and the Arctic Shift archive (Oct 30, 2026), growth from SubMouse's weekly snapshots. Member counts of communities outside our Top 1000 come from the archive and can lag a little. Not affiliated with Reddit.