r/sciencefiction is a subreddit with 311k members. The most common kinds of discussions are advice requests, and the community frequently discusses scifi, sci fi, worst, tired, and looking for a short story, and they frequently recommend/review sci-fi books, science fiction books, and science fiction.
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 of science. General speculative fiction posts are fine as long as they primarily focus on Science Fiction.
Popular Themes in r/sciencefiction
#1
Advice Requests
: "Dune/Hyperion/Foundation - Which is the best to start?"
5 posts
Popular Topics in r/sciencefiction
#1
Scifi
23 posts
#2
Sci Fi
: "Alien Raiders (2008) One of the best indie sci-fi films, with one of the WORST titles ever stuck on it."
16 posts
#3
Worst
15 posts
#4
Tired
9 posts
#5
Looking For A Short Story
9 posts
#6
Book
8 posts
#7
Annoying
7 posts
#8
Looking For A Book
7 posts
#9
Series
7 posts
#10
Hate
6 posts
Products Discussed in r/sciencefiction
Sci-fi Books
150 reviews
#1
Robert A. Heinlein
4.6★ from 14 reviews
#2
Isaac Asimov
4.8★ from 9 reviews
#3
Orson Scott Card
5.0★ from 8 reviews
Science Fiction Books
102 reviews
#1
Arthur C. Clarke
5.0★ from 5 reviews
#2
Frank Herbert
5.0★ from 4 reviews
#3
Andy Weir
5.0★ from 4 reviews
Science Fiction
51 reviews
#1
Martha Wells
5.0★ from 4 reviews
#2
Andy Weir
4.7★ from 3 reviews
#3
Adrian Tchaikovsky
5.0★ from 3 reviews
Member Growth in r/sciencefiction
Yearly
+38k members(13.9%)
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About
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Last updated: July 17, 2026