Best Science Subreddits

Largest communities first, with fastest-growing subreddits highlighted separately.

Best Science Reddit Communities

This guide highlights the largest and fastest-growing science subreddits for science readers, educators, and researchers. FreeSubStats tracks 82 Science communities with 53,866,841 combined members, so the list uses live subreddit analytics instead of a static editorial snapshot.

For the full sortable directory, open the Science subreddit analytics page.

How This List Is Built

Largest science subreddits are ranked by current member count
Fastest-growing communities are highlighted separately by weekly growth rate
Each entry links to a live analytics page with history, related subreddits, and current stats

Science Subreddit Snapshot

Tracked Subreddits
82
Total Members
53,866,841
Daily Growth
↗ +0.25%
Weekly Growth
↗ +1.05%

Largest Science Subreddits

#1
r/Futurology icon

r/Futurology

A subreddit devoted to the field of Future(s) Studies and evidence-based speculation about the development of humanity, technology, and civilization. -------- You can also find us in the fediverse at - https://futurology.today

Members
21,642,434
#2
r/nutrition icon

r/nutrition

A subreddit for the discussion of nutrition science. Macronutrients, micronutrients, vitamins, diets, and nutrition news are among the many topics discussed. Civil discourse is required.

Members
5,885,904
#3
r/oddlyspecific icon

r/oddlyspecific

A subreddit for those things that are just way too specific.

Members
3,758,966
#4
r/whatisthisthing icon

r/whatisthisthing

For the identification of mysterious objects

Members
3,099,605
#5
r/astrophotography icon

r/astrophotography

/r/astrophotography celebrates amateur astrophotography and will primarily focus on sharing and discussing the work of our members. We encourage sharing original content of real astronomical objects as a means of showcasing that work with those who enjoy astrophotography, inspiring those who are new to astrophotography, and requesting and providing constructive feedback on the work.

Members
2,633,909
#6
r/

r/AskAcademia

This subreddit is for discussing academic life, and for asking questions directed towards people involved in academia, (both science and humanities).

Members
2,107,396
#7
r/worldbuilding icon

r/worldbuilding

For artists, writers, gamemasters, musicians, programmers, philosophers and scientists alike! The creation of new worlds and new universes has long been a key element of speculative fiction, from the fantasy works of Tolkien and Le Guin, to the science-fiction universes of Delany and Asimov, to the tabletop realm of Gygax and Barker, and beyond. This subreddit is about sharing your worlds, discovering the creations of others, and discussing the many aspects of creating new universes.

Members
1,880,321
#8
r/

r/AskEconomics

A central repository for questions about economic theory, research, and policy. Please read the rules before posting, as we remove all comments which break the rules. Answers must be in-depth and comprehensive, or they will be removed. Posts should be in the form of a question.

Members
1,424,922
#9
r/whatsthisbug icon

r/whatsthisbug

Bug identification! All insects, spiders, crustaceans, etc. welcome!

Members
1,227,194
#10
r/nursing icon

r/nursing

A large science subreddit tracked by FreeSubStats.

Members
1,117,326

Fastest Growing Science Subreddits

More Best Subreddit Guides