Best Science Subreddits
Science communities from general news to specialist fields like astronomy, physics, biology and mathematics. Several are moderated strictly and ask you to cite your sources.
We list 39 science subreddits with about 133.3M subscriptions between them. The median one has 706K members, and the biggest, r/science, has 34.2M.
Tip: On the strict science subreddits, link to a primary source or peer-reviewed study. Posts that only link to news articles may be removed.
| # | Subreddit | Members | What it’s about |
|---|---|---|---|
| 1 | r/science | 34.2M | This community is a place to share and discuss new scientific research. Read about the latest advances in astronomy, biology, medicine, physics, social science, and more. |
| 2 | r/space | 27.8M | Share & discuss informative content on: Astrophysics Cosmology Space Exploration Planetary Science Astrobiology |
| 3 | r/askscience | 26.2M | Ask a science question, get a science answer. |
| 4 | r/biology | 5.4M | A place to discuss all things biology! We welcome people and content from all related fields. |
| 5 | r/math | 3.9M | This subreddit is for discussion of mathematics. All posts and comments should be directly related to mathematics, including topics related to the practice, profession… |
| 6 | r/chemistry | 3.8M | A community for chemists and those who love chemistry |
| 7 | r/sciencememes | 3.8M | r/sciencememes A home for all scientists to submit their lab or science based memes and comics from any discipline! |
| 8 | r/Physics | 3.2M | For physicists and physics students. See the rules before posting, and the subreddit wiki for common questions. Basic homework questions are not allowed. |
| 9 | r/Astronomy | 3M | The amateur hobby of humanity since the dawn of time and scientific study of celestial objects. |
| 10 | r/datascience | 2.7M | A space for data science professionals to engage in discussions and debates on the subject of data science. |
| 11 | r/AskEngineers | 2.7M | Engineers apply the knowledge of math & science to design and manufacture maintainable systems used to solve specific problems. |
| 12 | r/theydidthemath | 2.2M | And they said math has no real world applications |
| 13 | r/Paranormal | 2M | r/Paranormal is a space dedicated to true, first-hand, paranormal experiences. |
| 14 | r/AskPhysics | 1.5M | /r/AskPhysics exists to answer questions about physics. Questions should be relevant, and answers should be on-topic and correct. |
| 15 | r/KerbalSpaceProgram | 1.5M | The Kerbal Space Program subreddit. For all your gaming related, space exploration needs. |
| 16 | r/OffMyChestPH | 1M | A Filipino community where we work to make it a safe space in which you can unload your burdens, as well as celebrate your wins and milestones. |
| 17 | r/HaircareScience | 996K | This subreddit aims to provide resources for achieving better hair quality through scientific research in trichology, physiology, chemistry, and biology |
| 18 | r/EngineeringStudents | 940K | This is a place for engineering students of any discipline to discuss study methods, get homework help, get job search advice, and find a compassionate ear when you get… |
| 19 | r/AskScienceFiction | 869K | It's like Ask Science, but all questions and answers are written with answers gleaned from the universe itself. Use in-universe knowledge, rules, and common sense to… |
| 20 | r/engineering | 706K | r/engineering is a forum for engineering professionals to share information, knowledge, experience related to the principles & practices of the numerous engineering… |
| 21 | r/labrats | 675K | Welcome to r/LabRats! A space for scientists, researchers, and lab workers to share experiment fails, lab wins, and PI woes. Do you need advice, a place to vent, or just… |
| 22 | r/statistics | 601K | /r/Statistics is going dark from June 12-14th as an act of protest against Reddit's treatment of 3rd party app developers. _This community will not grant access requests… |
| 23 | r/EDC | 531K | A Reddit space where people can come together to show and discuss their various EDC items, ask questions and receive advice from fellow carriers, and generally promote… |
| 24 | r/SpaceXLounge | 380K | Welcome to r/SpaceXLounge, the sister subreddit to r/SpaceX, and a place for relaxed and laid-back discussion. We recommend Old Reddit with r/SpaceXLounge. |
| 25 | r/sffpc | 314K | All about small form factor PCs – decreasing size and maximizing space efficiency! |
| 26 | r/ElectricalEngineering | 298K | A place to ask questions, discuss topics and share projects related to Electrical Engineering. |
| 27 | r/sciencefiction | 274K | This reddit is for fans and creators of Science Fiction and related media in any form. SF topics should involve plausible ideas reached through the rational application… |
| 28 | r/IndianSkincareAddicts | 266K | A space for Indians to discuss their varied experiences with beauty, with a strong emphasis on science. |
| 29 | r/Kenya | 232K | Welcome to the official Kenyan community on Reddit. This is a dynamic space for everything Kenyan. Karibu. |
| 30 | r/gratefuldead | 211K | A great place to space your face. |
| 31 | r/PhD | 210K | The goal of this community is to support PhD seekers and holders globally, fostering a thoughtful space for shared experiences, challenges, and growth. |
| 32 | r/MechanicalEngineering | 207K | The gathering place for mechanical engineers to discuss current technology, methods, jobs, and anything else related to mechanical engineering. |
| 33 | r/spaceengineers | 196K | This subreddit is an unofficial community about the video game "Space Engineers" (and the upcoming sequel, Space Engineers 2), a sandbox game on PC, Xbox and… |
| 34 | r/retailhell | 152K | Retail Hell is a place for workers in the retail space to come together and support each other. Vent about your bad experience. Bitch about your boss. |
| 35 | r/blackladies | 147K | The face of Black Women on Reddit. This subreddit is designed to be a safe space. While allies are appreciated, r/blackladies is for Black women. |
| 36 | r/AsianMasculinity | 79K | The online community for Asian men. The only space on the web dedicated to critically examining the Asian male experience. |
| 37 | r/Berghain_Community | 56K | Live real-time Klubnacht queue status updates & community meeting place for Berghain LOVERS ❤️ This space is moderated by active, passionate ravers who attend Berghain… |
| 38 | r/DeathBattleMatchups | 43K | This subreddit is dedicated to providing a space for people who would like to post their own potential DEATH BATTLE! matchups for people to see and debate over. |
| 39 | r/Stormgate | 23K | Stormgate is a free-to-play, next-gen RTS under development. Command mechs to defend the Earth or invade it as the demonic Infernal Host or the angelic Celestial Armada… |
Member counts were recorded in July 2025 and are shown as a size guide; current numbers may differ.
Frequently asked questions
What is the biggest science subreddit?
Of the subreddits on this list, r/science is the largest with about 34,247,595 members, followed by r/space with 27,810,026.
Are there smaller science subreddits?
Yes. If the big subreddits feel too busy, try r/Stormgate (23K), r/DeathBattleMatchups (43K), r/Berghain_Community (56K). They are the smallest communities on this page.
How is this list ordered?
The 39 science subreddits are sorted by subscriber count (July 2025). A subreddit is included when its name or sidebar description is about science, so some also appear under Advice & Discussion, Education & Learning.