How the mathematics communities compare
Membership is concentrated: the three largest communities hold 93% of all members on this list, so most of the mathematics conversation happens in a handful of places. Size and activity don't line up perfectly: r/math has the most members, but r/mathematics gets the most new posts (about 36 a day). Per member, the liveliest is r/matheducation: 8.3 posts a day from 32.5K members — a smaller crowd, but an engaged one. The oldest is r/math, founded in 2008, and every community here is more than five years old — this is a long-established corner of Reddit.
The 9 biggest mathematics subreddits
r/math 3,976,976 members · +1K since Oct 26 · since 2008This subreddit is for discussion of mathematics. All posts and comments should be directly related to mathematics, including topics related to the practice, profession and community of mathematics.
- Lr/learnmath ↗ 368,731 members · ~29 posts/day · since 2009
Post all of your math-learning resources here. Questions, no matter how basic, will be answered (to the best ability of the online subscribers).
- Ar/askmath ↗ 180,976 members · ~24 posts/day · since 2008
This subreddit is for questions of a mathematical nature. Please read the subreddit rules below before posting.
- Mr/mathematics ↗ 162,052 members · ~36 posts/day · since 2008
r/mathematics is a subreddit dedicated to focused questions and discussion concerning mathematics.
- Mr/maths ↗ 55,426 members · ~4.1 posts/day · since 2008
Students, enthusiasts, researchers, educators, and problem solvers actively discussing and solving math-related topics.
- Mr/MathHelp ↗ 47,639 members · ~2.4 posts/day · since 2009
A sub for helping you with your mathematics problems! If you're willing to learn, we're willing to teach.
- Mr/matheducation ↗ 32,537 members · ~8.3 posts/day · since 2008
/r/matheducation is for discussions of math teaching and pedagogy.
- Mr/mathpics ↗ 28,017 members · ~0.7 posts/day · since 2011
Math Pics: What math looks like
- Mr/mathriddles ↗ 27,481 members · ~0.7 posts/day · since 2014
This subreddit is for anyone to share math or logic related riddles, and try and solve others. Come check it out! This subreddit is designed for viewing on old.reddit.com.
Choosing where to post
If you have a question, start in r/learnmath: it is set up for exactly that, and with about 29 new posts a day there are plenty of people around to answer. Competition for attention differs a lot: r/maths has 55.4K members but only about 4.1 new posts a day — roughly one new post for every 13.5K members — while r/mathematics gets about 36 a day, one for every 4.5K. A strong, well-made post therefore has more room to be seen in r/maths; r/mathematics is better when you want quick replies.
A simple rule of thumb: ask questions in the specialised communities and share your best finds in the big ones, where they can reach the most people. 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 mathematics subreddit?
r/math is the largest, with 3,976,976 members, followed by r/learnmath (368.7K) and r/askmath (181K).
Which mathematics subreddit is the most active?
By new posts per day, r/mathematics leads with about 36, ahead of r/learnmath (29). Counts are averages over the last seven days.
Where should a beginner ask about mathematics on Reddit?
r/learnmath is the one built around questions and advice, with about 29 new posts a day. Check its rules and search it first — common questions have usually been answered.
How many mathematics subreddits are there?
We list 9 active, safe-for-work mathematics communities with at least 25,000 members each, 4.9M 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 mathematics subreddit?
r/math, created on Jan 24, 2008.
Are these mathematics 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 (Nov 6, 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.