Biology subreddits
We found 58 active biology subreddits: communities with at least one new post a day on average in September 2026, ranked by members. The largest is r/biology with 5.48M members. The busiest is r/Biohackers, with 1,938 posts last month. In 13 of the 44 we could measure, a brand-new account's post usually stays up: they remove 17% or fewer of posts from accounts under a week old.
Data for 58 communitiesDownload CSV
Filter it by your account age and karma, the audience you want and the best time to post.
- r/biology5.48M members
- r/Biohackers1,938 posts in September 2026
- r/BodyHackGuide+323% members in 12 months
- r/Microbiome15% of new-account posts removed
All active biology subreddits, by members
| # | Subreddit | Members | Posts / month | Member growth, 12 mo | Median author age | Women | Posts with a reply | New-account posts removed | Links |
|---|---|---|---|---|---|---|---|---|---|
| 1 | r/biology↗A place to discuss all things biology! We welcome people and content from all related fields. | 5.48M | 494 | +1% | 29 | 35% | 77% | Min. age/karma | Yes |
| 2 | r/Naturewasmetal↗A collection of dinosaurs and other awesome creatures that are now extinct. | 983K | 140 | +3% | 28 | 20% | 79% | 66% | Yes |
| 3 | r/Biohackers↗Welcome to r/Biohackers. This community is designed for individuals interested in DIY biology, sometimes referred to as biohacking. It focuses on DIY biology, Pharmacology, and Grinding techniques. | 919K | 1,938 | +38% | 35 | 34% | 100% | Min. age/karma | Yes |
| 4 | r/Ornithology↗Welcome to Ornithology, a subreddit dedicated to the scientific study of wild birds. This is a place to discuss wild birds in a scientific context — their biology, ecology, evolution, behavior, and mo | 424K | 295 | +11% | 33 | 54% | 99% | Min. age/karma | Yes |
| 5 | r/Paleontology↗A science-based community for discussing fossil findings, prehistoric life, and ancient ecosystems. | 332K | 630 | +21% | 28 | 27% | 98% | 25% | Yes |
| 6 | r/Entomology↗Entomology: the branch of zoology concerned with the study of insects All insect and science related posts are welcome! | 311K | 1,679 | +14% | 29 | 46% | 65% | 36% | Yes |
| 7 | r/biotech↗News about any technological application that uses biological systems, living organisms, or derivatives thereof, to make or modify products or processes for specific use. | Or we can talk about career | 257K | 1,094 | +27% | 30 | 41% | 59% | 100% | Yes |
| 8 | r/longevity↗The geroscience hypothesis proposes it is possible to delay or prevent the onset of age-related ill health and increase healthy lifespan by targeting the biological mechanisms of aging. The main focus | 214K | 86 | +9% | 32 | 19% | 53% | Min. age/karma | Yes |
| 9 | r/botany↗Botany is the scientific study of plants. Topics may include: Evolution, Ecology, Morphology, Systematics, and Physiology. Please use r/whatsthisplant for all plant identification requests. | 211K | 59 | +12% | 29 | 43% | 67% | Min. age/karma | Yes |
| 10 | r/microbiology↗The study of microscopic eukaryotes, fungi, protists, prokaryotes, viruses, and prions. | 203K | 252 | +13% | 28 | 50% | 80% | Min. age/karma | Yes |
| 11 | r/Anthropology↗A storehouse of linguistic, archaeological, cultural and biological anthropology information. | 199K | 110 | +13% | 33 | 31% | 60% | – | Yes |
| 12 | r/Microbiome↗new-account friendlyWelcome to r/Microbiome This is a discussion space for the communities of microorganisms that inhabit us, animals, and the environment. Keep in mind this is not a place for medical advice and post | 190K | 282 | +20% | 34 | 53% | 64% | 15% | Yes |
| 13 | r/neuroscience↗Dedicated to aggregation & discussion of neuroscience research. We use a strict content filter. For less restrictive discourse, see /r/neuro. | 187K | 188 | +10% | 25 | 35% | 95% | Min. age/karma | Yes |
| 14 | r/Aging↗Welcome to r/Aging, a community for all generations to discuss the biological, social, and philosophical journey of getting older. From the science of gerontology to the personal experience of moving | 178K | 705 | +73% | 45 | 61% | 69% | 27% | Yes |
| 15 | r/evolution↗A community to discuss evolutionary biology | 175K | 152 | +20% | 33 | 22% | 79% | Min. age/karma | Yes |
| 16 | r/BodyHackGuide↗r/BodyHackGuide – Biohacking & Performance Optimization Welcome to the hub for biohackers optimizing health, hormones, and longevity. ✅ Peptides, nootropics, metabolism ✅ Recovery, performance, & slee | 169K | 1,102 | +323% | 36 | 22% | 100% | 60% | Yes |
| 17 | r/23andme↗The official unofficial 23andMe subreddit! Talk about your genes and their possible implications! Discord: https://discord.gg/3Jjc3GdmtB | 168K | 656 | +11% | 28 | 52% | 81% | 24% | Yes |
| 18 | r/bioinformatics↗## A subreddit to discuss the intersection of computers and biology. ------ A subreddit dedicated to bioinformatics, computational genomics and systems biology. | 167K | 319 | +16% | 26 | 34% | 66% | Min. age/karma | Yes |
| 19 | r/zoology↗Welcome to r/Zoology: A community about the scientific study of the behavior, structure, physiology, classification, and distribution of animals. Please read the rules for submissions. | 153K | 258 | +41% | 32 | 43% | 77% | 64% | Yes |
| 20 | r/marinebiology↗This is a community to share and promote marine biology research and education. | 149K | 171 | +6% | 26 | 41% | 75% | – | Yes |
| 21 | r/neuro↗/r/neuro, involving neuroscience: Discussion and news pertaining to neurobiology, cognitive studies, clinical neuroscience, the laboratory, and anything else related. We're a bit laid back here, you' | 148K | 182 | +13% | 27 | 38% | 38% | 97% | Yes |
| 22 | r/genetics↗For discussion of genetics research, ethical and social issues arising from genetics and its applications, genetics career questions, etc. | 146K | 180 | +10% | 30 | 57% | 70% | 97% | Yes |
| 23 | r/immortalists↗Everything about longevity and related topics like: Health, AI, human enhancements, Anti-Aging, Longevity, Robotics, Faith in Jesus Christ, Genetic Editing, Biotechnology, immortality... Our Goal is: | 139K | 325 | +101% | 38 | 24% | 65% | 63% | Yes |
| 24 | r/ecology↗Ecology (from Greek: οἶκος, "house"; -λογία, "study of") is the scientific study of the relations that living organisms have with respect to each other and their biophysical environment. | 126K | 161 | +13% | 29 | 40% | 62% | 20% | Yes |
| 25 | r/microscopy↗new-account friendlyIn science class, you always wished you could play with the microscope a little bit longer. Now that you are an adult, you actually can. Cooler and with more bang for your buck than r/telescopes, micr | 121K | 393 | +13% | 30 | 32% | 94% | 7% | Yes |
| 26 | r/whatisthisbone↗new-account friendlyFind a bone? Well, our crack team of experts, and really anyone who wants to, can try and identify it for you. | 89K | 306 | +5% | 32 | 45% | 76% | <1% | Yes |
| 27 | r/Parasitology↗A community for anyone interested in the things that live on and in you. | 77K | 138 | +10% | 33 | 52% | 62% | 75% | Yes |
| 28 | r/neurology↗Welcome to r/neurology home of science-based neurology for physicians, neuroscientists, and fans of neurology. Topics include multiple sclerosis, seizures/epilepsy, stroke, peripheral neurology, anato | 65K | 240 | +17% | 28 | 43% | 97% | Min. age/karma | Yes |
| 29 | r/biologymemes↗Just your daily vibe check from r/biologymemes. 🔬 Keep it simple, keep it funny, and remember—only biology memes allowed here! | 63K | 42 | +17% | 22 | 33% | 87% | – | Yes |
| 30 | r/pleistocene↗new-account friendlyA subreddit for any news, information, artwork, and discussion about the Pleistocene epoch. | 57K | 197 | +40% | 28 | 22% | 76% | 8% | Yes |
Show all 58 subreddits
| # | Subreddit | Members | Posts / month | Member growth, 12 mo | Median author age | Women | Posts with a reply | New-account posts removed | Links |
|---|---|---|---|---|---|---|---|---|---|
| 31 | r/HumanMicrobiome↗This sub is a haven from the flood of misinformation that is widespread on Reddit and over much of the internet. We have an evidence-based focus on the complex ecosystem in our guts that regulates the | 47K | 42 | +8% | 31 | 41% | 100% | 100% | Yes |
| 32 | r/AskBiology↗If you have questions or if you want to clarify on something that confuses you about any topic of biology, we are here to help. This sub is a friendly space for biology-related discussions. Please f | 41K | 324 | +80% | 34 | 29% | 84% | 85% | No |
| 33 | r/molecularbiology↗new-account friendlyThe study of life at the molecular level. | 41K | 118 | +35% | 27 | 39% | 48% | 16% | Yes |
| 34 | r/wildlifebiology↗new-account friendlyWelcome to r/wildlifebiology! This is a community for wildlife biologists, ecologists, students, and enthusiasts. Share peer-reviewed research, discuss conservation strategies, post field photos, and | 40K | 92 | +32% | 30 | 48% | 75% | 11% | Yes |
| 35 | r/NIH↗National Institutes of Health in Bethesda, Maryland. | 39K | 144 | +17% | 40 | 47% | 79% | Min. age/karma | Yes |
| 36 | r/Nutraceuticalscience↗Here you will find the latest scientific research in the world on naturopathic medicine, supplements, nootropics and medicinal mushrooms. NEW SCIENTIFIC STUDIES ON REQUEST. Make a post on the fr | 31K | 866 | +523% | 39 | 28% | 56% | – | Yes |
| 37 | r/HerpesCureResearch↗This is a space for promoting cure and vaccine research for herpes simplex virus (HSV 1&2). This group focuses on fundraising and activism to promote better treatments, vaccines and a cure for HSV. We | 31K | 60 | +9% | 29 | 50% | 42% | 95% | Yes |
| 38 | r/biostatistics↗This biostatistics community is dedicated to sharing information and discussing topics in or related to biostatistics. | 30K | 73 | +29% | 28 | 43% | 59% | 17% | Yes |
| 39 | r/biotechnology↗Biotechnology | 29K | 73 | +15% | 25 | 36% | 23% | Min. age/karma | Yes |
| 40 | r/GroundZeroMycoLab↗A community of mycologists and mycology enthusiasts here to educate, teach, and learn as well as discuss recent discoveries and advancements in the field. | 29K | 1,093 | +630% | 35 | 15% | 67% | 36% | Yes |
| 41 | r/DNA↗new-account friendlythe science of DNA. Not for paternity topics. Not interested in seeing your ethnicity %s. | 29K | 77 | +16% | 38 | 65% | 35% | 10% | Yes |
| 42 | r/QuantifiedSelf↗Quantified Self | 28K | 148 | +52% | 32 | 24% | 77% | Min. age/karma | Yes |
| 43 | r/Agarporn↗new-account friendlyA place to ask questions, show off, and learn from each other about agar. | 27K | 185 | +36% | 33 | 18% | 74% | 8% | Yes |
| 44 | r/Immunology↗Discussion of immunology related topics. Peer review, pop science or news articles allowed. Please do not post questions asking for medical advice or espousing pseudo-science. | 26K | 71 | +31% | 30 | 48% | 53% | 98% | Yes |
| 45 | r/Virology↗The Subreddit about viruses; the kind that make you sick! | 23K | 42 | +27% | 32 | 39% | 51% | – | Yes |
| 46 | r/Restoration_Ecology↗Talk about restoration ecology topics here. | 22K | 36 | +47% | 33 | 36% | – | – | Yes |
| 47 | r/DebateEvolution↗Reddit's premier debate venue for the evolution versus creationism controversy. Home to experienced apologists of both sides, biology professionals and casual observers, there is no sub with more comp | 21K | 111 | +22% | 37 | 15% | 90% | Min. age/karma | No |
| 48 | r/genomics↗genomics | 20K | 63 | +12% | 31 | 30% | 35% | – | Yes |
| 49 | r/Physiology↗Questions and discussions related to physiology. Human physiology, zoophysiology, and function of any biological system are all welcome. Recently published? Post your paper and answer questions! | 20K | 39 | +16% | 26 | 34% | 48% | – | Yes |
| 50 | r/DNAAncestry↗new-account friendlyTo be used for genetics questions and discussion on tools, methods, genealogy, and research regarding using DNA to determine your ancestry. All questions on 23andMe, AncestryDNA, Genera, IllustrativeD | 18K | 527 | +191% | 30 | 47% | 57% | 15% | Yes |
| 51 | r/Histology↗new-account friendlyTissue Subreddit | 17K | 86 | +37% | 28 | 62% | 80% | 13% | Yes |
| 52 | r/ALevelBiology↗A subreddit where AS and A2 biology content can be discussed and advice and resources can be shared. | 15K | 205 | +59% | 18 | 57% | 34% | 34% | Yes |
| 53 | r/ClinicalGenetics↗new-account friendlyThis community is made for those interested in clinical genetics and its implications for human health and well-being. It is aimed at genetic counselors, medical geneticists, laboratory geneticists, a | 14K | 64 | +30% | 31 | 74% | 69% | 12% | Yes |
| 54 | r/Vaccine↗Vaccines save lives by preparing your immune system to fight harmful pathogens. This subreddit is dedicated to factual, science-based information and news on vaccines. We are not doctors, and nothing | 12K | 138 | +51% | 40 | 71% | 60% | – | Yes |
| 55 | r/bioinformaticscareers↗new-account friendlyBioinformatics careers. How to get started in bioinformatics. School advice. Job postings. | 12K | 158 | +84% | 25 | 45% | 74% | 15% | Yes |
| 56 | r/learnbioinformatics↗Educational materials for those who wish to learn bioinformatics. | 9K | 62 | +29% | 25 | – | 35% | – | Yes |
| 57 | r/MLS_CLS↗new-account friendlyThis community is for Medical Laboratory Scientists (MLSs)/Clinical Laboratory Scientists (CLSs)/Medical Technologists, MLS students, and anyone that wants to become an MLS. Our discussions include ca | 7.1K | 133 | +57% | 31 | 63% | 73% | 3% | Yes |
| 58 | r/FTDNA↗Share your FTDNA results! www.familytreedna.com (NOT OFFICIALLY AFFILIATED WITH FTDNA) | 2.7K | 117 | – | 29 | 25% | 50% | – | Yes |
Looking for a ranking by size and growth? Top biology subreddits by tier.
How this list is built
Subreddits are grouped into topics by what their posts are about; this list holds the biology group. We include subreddits that are safe for work and had at least 30 new posts in September 2026, about one a day.
Members is Reddit's subscriber count; growth compares it with a year earlier. Posts with a reply is the share of posts that got at least one comment over the last three months. Median author age and women are estimated from what authors say about themselves, and shown only when enough of them did. New-account posts removed is the share of posts from accounts younger than 7 days that were removed; communities at or below 17% are marked new-account friendly. Min. age/karma means the subreddit asks for a minimum account age or karma before you can post.
The list is rebuilt every month from public Reddit posts and comments. Data and CSV are free to reuse under CC BY 4.0 with a link to this page.
Biology subreddits: common questions
What is the biggest biology subreddit?
r/biology, with 5.48M members in September 2026. Next are r/Naturewasmetal (983K) and r/Biohackers (919K).
Which biology subreddits are the most active?
By posts in September 2026: r/Biohackers (1,938 posts), r/Entomology (1,679 posts) and r/BodyHackGuide (1,102 posts).
Which biology subreddits can a new account post in?
r/Microbiome (15% of new-account posts removed), r/microscopy (7% of new-account posts removed) and r/whatisthisbone (<1% of new-account posts removed). They ask for no minimum karma or account age, and most posts from accounts under a week old stay up.
How often is this list updated?
Every month, when we rebuild our subreddit data. This version uses data for September 2026. Member counts come from Reddit; activity, removals and who writes come from public Reddit posts and comments.
Find the subreddits that fit your post
This list is the same for everyone. Find Subs narrows it to communities your account can post in, where your audience writes, and tells you when to post.