r/ISS↗
International Space Station
A subreddit dedicated to the International Space Station.
27k subscribers66 posts / mo in Sep 202637 authors / mosince 2012
r/ISS has 27k members (+98% over the last 12 months). It gets about 66 posts a month from 37 people. Top topics: Spacewalks, Soyuz Launches & Crews and ISS Observations.
When to post on r/ISS
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How r/ISS has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/ISS
Top topics
Share of the subreddit's posts
- Spacewalks8.6%
- Soyuz Launches & Crews3.9%
- ISS Observations3.9%
- SpaceX & Crew Dragon3.1%
- Russia Space Relations1.6%
Brands people mention
Most-mentioned brands and sites, last 12 months
- NASA
- European Space Agency
- Space
- Archive
- RussianSpaceWeb
Everything else about r/ISS
Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.
Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research