r/Costco on SubMouse

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) — we love you. Disclaimer: This is an unofficial Costco subreddit, r/Costco is not affiliated with Costco Wholesale Corporation or any of their subsidiaries. A recent sample averaged 40 posts a day (~46% image, ~33% text, ~16% gallery). Its public rules 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; rules can change. Search before reposting common clips/questions. Avoid clickbait titles. Common flairs include: [Product], [General Question], [Food Court], [Frozen Food Products].

The community was created on May 26, 2010, which makes it 16 years old. Since Nov 2, 2026, it has gained 2,373 subscribers (+0.14%). 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 22% 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 13.0. It is also one of the faster-growing big communities: its 1.34% gain since Sep 19, 2026 beats 95% 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 9, 2026, r/Costco went up from 1,630,183 to 1,651,980 subscribers (+21.8K, +1.34%). That is about 427 new members per day. The chart shows 10 weekly subscriber counts.

All-time top posts

The highest-ranked posts in the history of r/Costco, from 2023 to 2026, ranked by Reddit.

I can't believe he repliedu/RoseEsquivel · Feb 10, 2025 · image
I just watched someone return a TV — it was purchased in 2002u/estaack · Apr 8, 2024 · image
Sometimes you get lucky at the pumpu/CONative976 · Jan 9, 2026 · image
The one thing our grandpa wanted for his 100th birthdayu/WinterUnfair9435 · Feb 23, 2026 · image
I was a Costco butcher for Halloween, handing out “ground werewolf” rice crispy treats to the kids.u/Marissachan · Nov 2, 2025 · image
Costco manager saved my dad's lifeu/Snoo_53440 · Jul 27, 2025 · text post
Today’s Costco run.. $165.50. All that for a single guyu/jasont111 · Jan 2, 2025 · image
My ode to the unbeatable $1.50 Hot Dog Deal in stained glassu/cheezedragon25 · Oct 5, 2025 · image
Stop bringing fake service dogs inside.Jun 7, 2023 · 34,659 points · 4,438 comments · text post
Put Kirkland Vodka in the freezer and it froze.u/CloudCity_Mayor · May 6, 2024 · image

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.

kirkland 22
food 14
chicken 14
pizza 10
court 8
rotisserie 7
location 7
buy 7
membership 7
item 7
mug 6
halloween 6
good 6
cat 5
signature 5
meat 5
price 5
store 5

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.

Posts per hour of the day, UTC, Oct 29, 2026 – Nov 4, 2026

Images 46%Text posts 33%Galleries 16%Videos 3%Links 2%

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 1,651,980 subscribers (Nov 9, 2026), which makes it the #645 safe-for-work subreddit in the SubMouse ranking. It added 21,797 members between Sep 19, 2026 and Nov 9, 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.

Stats from public data (data updated Nov 9, 2026; activity, rules and archive totals via the Arctic Shift archive, Nov 6, 2026; top posts from Reddit’s public feeds). 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.

r/Costco