About r/Costco
In its own words:
Welcome to Costco, we love you. Disclaimer: This is an unofficial Costco subreddit, r/Costco is not affiliated with Costco Wholesale Corporation or any of their subsidiaries.
Community guide
r/Costco (#645, about 1.6 million subscribers) is oriented around: Welcome to Costco, we love you. Disclaimer: This is an unofficial Costco subreddit, r/Costco is not affiliated with Costco Wholesale Corporation or any of their subsidiaries. Recent activity samples show 40 posts/day in recent samples (~46% image, ~33% text, ~16% gallery). Public rules we collected include: No Availability Question Posts - Allowed In Monthly Megathread Only; No Personal Attacks, No Trolling, Be Civil; No Reposts of Previously Asked Questions or Discussions - Utilize Search Before Posting.
What belongs here
Stay inside the room’s stated scope rather than adjacent off-topic dumps. Self-promotion and ads are limited—read those rules before linking your own work. Civility rules are enforced; personal attacks get removed.
How it differs from lookalikes
Prefer this room when your post matches its description and rule list—not merely a larger sibling community. The public rule list is long enough that skimming all entries once beats assuming defaults from similar subs.
Practical pointers
Read the live sidebar/rules before posting; collected snapshots can lag. Search before reposting common clips/questions. Avoid clickbait titles. Common flairs in samples include: [Product], [General Question], [Food Court], [Frozen Food Products].
SubMouse Editorial
The community was created on May 26, 2010, which makes it 16 years old. Since Oct 26, 2026, it has gained 4,241 subscribers (+0.26%). It sits just behind r/RedditPregunta (#644) and ahead of r/nostalgia (#646) in our ranking.
What sets r/Costco apart
r/Costco is far more image-driven than most big subreddits: 46% of its recent posts are images, against a median of 21% across the Top 100. It is a discussion-heavy community, with about 28.4 comments per post over its lifetime versus a Top 100 median of 13.1. It is also one of the faster-growing big communities: its 1.19% gain since Sep 19, 2026 beats 96% of the Top 100. Its rhythm is strongly tied to time zones: the busiest hour (20:00 UTC) sees about 26.0× as many posts as the quietest (07:00 UTC).
Subscriber growth
Between Sep 19, 2026 and Nov 2, 2026, r/Costco went up from 1,630,183 to 1,649,607 subscribers (+19.4K, +1.19%). That is about 441 new members per day. The chart uses our weekly snapshots (9 so far), so it gets longer every week.
What r/Costco talks about
We read the titles of 287 recent posts (Oct 29–Nov 5), the words that come up most are “kirkland”, “food”, “chicken”, “pizza” and “court”. Other frequent themes are rotisserie, location, buy, membership, item and mug. Recurring phrases include “food court”, “rotisserie chicken”, “cat food” and “kirkland signature”. By format, 46% are images, 33% are text posts and 16% are galleries.
Popular post flairs: [Product] (14), [General Question] (11), [Food Court] (11), [Frozen Food Products] (9), [Kirkland Signature Products] (8), [Meme / Shitpost] (8).
Activity and best time to post
r/Costco gets about 40 new posts a day. The public archive holds 170,070 posts and 4,830,226 comments in total, about 28.4 comments per post. Last week the busiest day was Sunday (54 posts) and the quietest was Tuesday (30). Posting peaks around 20:00 UTC and is lowest around 07:00 UTC.
Rules of r/Costco
The moderators of r/Costco list 10 rules. In short:
- No Availability Question Posts - Allowed In Monthly Megathread Only
- No Personal Attacks, No Trolling, Be Civil
- No Reposts of Previously Asked Questions or Discussions - Utilize Search Before Posting
- No Suggesting or Advocating for Policy Breaking
- No Vague Post Titles - Specific Question and/or Product Name Must Be Included If Applicable
- No Online Price Checks for Member Only Items
- No Doxxing - No Specific Warehouse Complaints or Named Employee Complaints
- No Political Comments
- No Spam, No Self-Promotion, No Selling
- Moderators May Remove Posts At Their Discretion
How to join
Open reddit.com/r/Costco and press “Join”. Read the community rules in the sidebar before you post: every subreddit is run by its own volunteer moderators.
Frequently asked questions
How many subscribers does r/Costco have?
r/Costco has 1,649,607 subscribers (Nov 2, 2026), which makes it the #645 safe-for-work subreddit in the SubMouse ranking. It added 19,424 members between Sep 19, 2026 and Nov 2, 2026.
When was r/Costco created?
r/Costco was created on May 26, 2010, so it has been around for 16 years. The oldest post in the public archive is from Aug 23, 2010.
Is r/Costco still active?
Yes. r/Costco gets about 40 new posts a day (average of the last four weeks). Over its lifetime the archive counts 170,070 posts and 4,830,226 comments. In a sample of 287 recent posts we counted 263 different authors.
What is the best time to post in r/Costco?
Based on post counts from Oct 29, 2026 to Nov 4, 2026, the busiest day was Sunday and the quietest Tuesday, and most posts arrive around 20:00 UTC, with the fewest around 07:00 UTC. More posts also means more competition, so a quieter hour can help a post get noticed.
What kind of posts are on r/Costco?
The community describes itself as: “Welcome to Costco, we love you. Disclaimer: This is an unofficial Costco subreddit, r/Costco is not affiliated with Costco Wholesale Corporation or any of their subsidiaries.” Recent post titles often mention kirkland, food, chicken, pizza and court. Most posts are images (46%).
Is r/Costco SFW?
Yes. Reddit does not mark r/Costco as an 18+ (NSFW) community. SubMouse lists safe-for-work subreddits only.
What are the rules of r/Costco?
Join the community on Reddit first, then use “Create post”. r/Costco accepts both text and link posts, with images, videos and galleries enabled. It has 10 posted rules, starting with: “No Availability Question Posts - Allowed In Monthly Megathread Only”; “No Personal Attacks, No Trolling, Be Civil”; “No Reposts of Previously Asked Questions or Discussions - Utilize Search Before Posting”. Moderators remove posts that break the rules, so read them in the sidebar before posting.
What subreddits are similar to r/Costco?
Communities with similar topics include r/rap (2.6M), r/KerbalSpaceProgram (1.5M), r/Sims4 (2M), r/memes (36.1M) and r/NoStupidQuestions (7.6M).
Stats from public data (data updated Nov 2, 2026; activity, rules and archive totals via the Arctic Shift archive, Nov 6, 2026). Point and comment counts are archive snapshots and can be lower than on Reddit today. SubMouse is an independent directory and is not affiliated with Reddit or the moderators of r/Costco.