How many subreddits are there?

The numbers in search results measure different things at different times, and several name no source. We read Reddit's own wording only for the first three rows.

One Reddit comment in search results puts the total near 3.8 million and credits a "quick google search".

Reddit's annual report states a floor, "over 100,000", and does not define an active community. We read the whole 2025 report and found no total for every subreddit created. Its Q3 2026 shareholder letter says only that Reddit "continued to grow the number of communities", with no count.

A real total would also have to decide what counts: abandoned communities, private ones and banned ones all add to one number and leave another unchanged. Treat any exact total as an estimate unless it names its source and date.

Of the 994 public communities in Reddit's popular listing on Nov 4, 2026, 514 had 1 million or more members. Reddit's 2024 annual report said over 500, an older floor of the same kind. Ours is a minimum too, since a community outside the first 1,000 we read can also pass a million.

The smallest community we read had 47,176 members, and the biggest, r/funny, had 67.6 million. See the full order on the most popular subreddits page. Member counts overlap, because one account can join many communities, and they include accounts that no longer visit.

We tracked 78,023 AI answers from Jan 9, 2026 to Oct 30, 2026. They carried 35,035 links to Reddit threads, from 2,918 different subreddits. Set against Reddit's 100,000 floor, that is under 3%, for the questions we track only. It is not the share of all subreddits AI cites. The 100 most cited on our subreddit list drew 15,990 of those links (45.6%).

A brand that wants to appear in AI answers has a much shorter list than 100,000. The subreddit finder narrows it to your niche. One limit: the questions we track come from our clients' niches, so other topics would surface other communities, and the number across all questions is likely higher.

Reddit's daily active uniques averaged 130.3 million in Q3 2026, the quarter ended September 30. Reddit defines one as a user it can identify with a unique identifier who visited a page on its website or opened a Reddit app at least once in a 24-hour period.

The letter puts the site at over 27 billion posts and comments. Its quarterly report says global daily active uniques were flat against Q2, with gains from marketing and other initiatives offset mainly by third-party search engine changes, and the letter warns they could fall by a low-double-digit percentage in Q4 if current trends hold.

We read Reddit's filings and each page in the first table on Nov 5, 2026. Member bands come from the first 1,000 communities in Reddit's popular-communities listing, read through its official Data API on Nov 4, 2026; the 6 that were not public are left out of the counts. AI figures come from our own tracking of answers to the buyer-style questions we follow for clients, including ChatGPT, Perplexity and Gemini. They count links in the answers; clicks and reads are not measured. The 2,918 counts every distinct r/ name in those links, so it may include some user profiles and communities that are no longer active.

• Reddit, Inc., Form 10-K for 2025, read Nov 5, 2026.
• Reddit, Inc., Form 10-K for 2024, read Nov 5, 2026.
• Reddit Q2 2026 shareholder letter, read Nov 5, 2026.
• Reddit Q3 2026 shareholder letter, Oct 29, 2026, read Nov 5, 2026.
• Reddit, Inc., Form 10-Q for Q3 2026, read Nov 5, 2026.
• Wikipedia, Reddit, read Nov 5, 2026.
• redaccs.com, The Reddit List, read Nov 5, 2026.
• Reddit Data API, popular-communities listing, read Nov 4, 2026.
• CommunityMentions subreddit data: AI citations per subreddit, Jan 9, 2026 to Oct 30, 2026.