Top Mathematics subreddits

Largest Mathematics subreddits

Largest Mathematics subreddits

#	Subreddit	Members	12-mo growth	Commenters / mo
1	r/math	3.98M	+1.9%	2,384
2	r/theydidthemath	2.45M	+11%	27,254
3	r/mathmemes	610,791	+7.0%	5,647
4	r/learnmath	477,077	+17%	3,231
5	M r/mathematics	255,895	+30%	4,011
6	r/askmath	248,682	+17%	3,311
7	r/calculus	208,192	+21%	1,067
8	T r/theydidthemonstermath	144,297	+1.6%	113
9	M r/MathJokes	128,973	+66%	7,878
10	r/okbuddyphd	114,122	+9.7%	497
11	r/3Blue1Brown	105,528	+27%	198
12	B r/badmathematics	77,632	+7.5%	153
13	r/maths	73,120	+17%	239
14	M r/MathHelp	58,106	+11%	257
15	r/desmos	55,318	+29%	648
16	G r/GAMETHEORY	41,890	+18%	76
17	V r/visualizedmath	38,380	+3.6%	5
18	P r/probabilitytheory	35,659	+59%	185
19	I r/itwasagraveyardgraph	31,965	+1.9%	9
20	M r/mathpics	31,230	+7.6%	28
21	r/mathriddles	31,138	+8.3%	116
22	L r/LinearAlgebra	31,034	–	188
23	r/mathsmemes	25,512	+36%	79
24	r/puremathematics	21,421	+8.8%	27
25	P r/PhilosophyofMath	20,579	–	232

Fastest growing Mathematics subreddits

Member growth over 12 months, among subreddits that had at least 18,251 members a year ago.

Fastest growing Mathematics subreddits

#	Subreddit	12-mo growth	Members gained	Members	Commenters / mo
1	M r/MathJokes	+66%	+51,049	128,973	7,878
2	P r/probabilitytheory	+59%	+13,301	35,659	185
3	r/mathsmemes	+36%	+6,749	25,512	79
4	M r/mathematics	+30%	+59,155	255,895	4,011
5	r/desmos	+29%	+12,572	55,318	648
6	r/3Blue1Brown	+27%	+22,398	105,528	198
7	r/calculus	+21%	+36,599	208,192	1,067
8	G r/GAMETHEORY	+18%	+6,366	41,890	76
9	r/askmath	+17%	+36,454	248,682	3,311
10	r/learnmath	+17%	+68,759	477,077	3,231
11	r/maths	+17%	+10,421	73,120	239
12	M r/MathHelp	+11%	+5,813	58,106	257
13	r/theydidthemath	+11%	+239,219	2.45M	27,254
14	r/okbuddyphd	+9.7%	+10,068	114,122	497
15	r/puremathematics	+8.8%	+1,730	21,421	27
16	r/mathriddles	+8.3%	+2,380	31,138	116
17	M r/mathpics	+7.6%	+2,217	31,230	28
18	B r/badmathematics	+7.5%	+5,388	77,632	153
19	r/mathmemes	+7.0%	+40,147	610,791	5,647
20	V r/visualizedmath	+3.6%	+1,345	38,380	5
21	r/math	+1.9%	+74,307	3.98M	2,384
22	I r/itwasagraveyardgraph	+1.9%	+592	31,965	9
23	T r/theydidthemonstermath	+1.6%	+2,306	144,297	113

Most members gained

Mathematics subreddits that gained the most members

#	Subreddit	Members gained	12-mo growth	Members	Commenters / mo
1	r/theydidthemath	+239,219	+11%	2.45M	27,254
2	r/math	+74,307	+1.9%	3.98M	2,384
3	r/learnmath	+68,759	+17%	477,077	3,231
4	M r/mathematics	+59,155	+30%	255,895	4,011
5	M r/MathJokes	+51,049	+66%	128,973	7,878
6	r/mathmemes	+40,147	+7.0%	610,791	5,647
7	r/calculus	+36,599	+21%	208,192	1,067
8	r/askmath	+36,454	+17%	248,682	3,311
9	r/3Blue1Brown	+22,398	+27%	105,528	198
10	P r/probabilitytheory	+13,301	+59%	35,659	185
11	r/desmos	+12,572	+29%	55,318	648
12	r/maths	+10,421	+17%	73,120	239
13	r/okbuddyphd	+10,068	+9.7%	114,122	497
14	r/mathsmemes	+6,749	+36%	25,512	79
15	G r/GAMETHEORY	+6,366	+18%	41,890	76
16	M r/MathHelp	+5,813	+11%	58,106	257
17	B r/badmathematics	+5,388	+7.5%	77,632	153
18	r/mathriddles	+2,380	+8.3%	31,138	116
19	T r/theydidthemonstermath	+2,306	+1.6%	144,297	113
20	M r/mathpics	+2,217	+7.6%	31,230	28
21	r/puremathematics	+1,730	+8.8%	21,421	27
22	V r/visualizedmath	+1,345	+3.6%	38,380	5
23	I r/itwasagraveyardgraph	+592	+1.9%	31,965	9

Most active Mathematics subreddits

People who comment in a month, the average of the three months ending September 2026.

Most active Mathematics subreddits

#	Subreddit	Commenters / mo	Posts / mo	Members
1	r/theydidthemath	27,254	1,529	2.45M
2	M r/MathJokes	7,878	546	128,973
3	r/mathmemes	5,647	439	610,791
4	M r/mathematics	4,011	943	255,895
5	r/askmath	3,311	752	248,682
6	r/learnmath	3,231	1,181	477,077
7	r/math	2,384	1,100	3.98M
8	r/calculus	1,067	314	208,192
9	r/desmos	648	377	55,318
10	r/okbuddyphd	497	41	114,122
11	C r/CasualMath	335	190	18,337
12	r/infinitenines	311	164	5,022
13	M r/MathOlympiad	309	142	10,487
14	M r/MathHelp	257	125	58,106
15	r/maths	239	105	73,120
16	P r/PhilosophyofMath	232	81	20,579
17	r/3Blue1Brown	198	147	105,528
18	M r/mathpuzzles	192	135	7,203
19	L r/LinearAlgebra	188	69	31,034
20	P r/probabilitytheory	185	53	35,659
21	B r/badmathematics	153	16	77,632
22	r/fucksparx	119	36	6,881
23	r/mathriddles	116	61	31,138
24	T r/theydidthemonstermath	113	7	144,297
25	A r/AppliedMath	101	59	7,475

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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).