- Link Authority: 52/100 (strong, high confidence).
- Web graph rank: #7,889 of 134,979,706 domains, the top 0.0059% of all domains.
- 15,532 linking domains counted in MrKeyword data.
- 59 hostnames under costco.com in the web graph.
- 23rd of 23 shopping, travel and payments on MrKeyword's list.
What is costco.com's domain authority?
costco.com has a MrKeyword Link Authority of 52/100, a strong score. The score comes from where costco.com sits in MrKeyword's web graph (August–October 2026): it is #7,889 of 134,979,706 domains by PageRank, and Link Authority places that position on a 0–100 log curve, so the strongest domain scores 100.
This is MrKeyword's own metric, not Moz DA or Ahrefs DR (how the domain authority scores differ); how Link Authority is calculated gives both formulas.
How many websites link to costco.com?
15,532 different domains link to costco.com in MrKeyword's data, counting each linking website once however many links it has. That is the number SEO tools call referring domains. The web graph also lists 59 hostnames under costco.com (subdomains such as www or blog count separately).
To see individual linking websites and anchor text, open the free backlink checker for costco.com.
Which strong websites link to costco.com?
The strongest linking domain MrKeyword's web graph shows for costco.com is adobe.com, with a Link Authority of 80. The table lists the 10 strongest by their own score.
Strongest domains linking to costco.com
| Linking domain | Link Authority | Web graph rank |
|---|---|---|
| adobe.com | 80 | #41 |
| amazon.com | 79 | #48 |
| bing.com | 71 | #241 |
| businessinsider.com | 68 | #394 |
| cbsnews.com | 66 | #543 |
| crazyegg.com | 62 | #1,270 |
| bain.com | 61 | #1,625 |
| campaignmonitor.com | 59 | #2,083 |
| bazaarvoice.com | 59 | #2,281 |
| builtin.com | 57 | #3,434 |
5 of the 10 strongest linking domains have a profile on MrKeyword's list too (adobe.com, amazon.com, bing.com, businessinsider.com, cbsnews.com). 1 of them is in costco.com's own group, shopping, travel and payments.
How does costco.com compare with similar websites?
costco.com is 23rd of 23 shopping, travel and payments on MrKeyword's list by Link Authority, with 4 neighbours above it in the table below. The median Link Authority of those 23 shopping, travel and payments is 66, so costco.com is 14 points below it.
costco.com and its nearest peers
| Website | Link Authority | Web graph rank | Linking domains |
|---|---|---|---|
| ikea.com | 59 | #2,271 | 61,879 |
| homedepot.com | 59 | #2,291 | 37,141 |
| expedia.com | 55 | #4,784 | 20,649 |
| wayfair.com | 53 | #6,621 | 14,915 |
| costco.com | 52 | #7,889 | 15,532 |
See every profiled site on the domain authority list of popular websites, or compare your own site with any of these in the free domain authority checker.
What does a Link Authority of 52 mean?
A Link Authority of 52 is strong: above the great majority of websites. This is the band where links from well-known publications and institutions make the biggest difference. In plain numbers, costco.com is in the top 0.0059% of the 134,979,706 domains in the web graph.
To raise your own site's score, read how to increase domain authority; for the domains at the very top, see the most-linked websites of 2026. The authority list explains why the 0–100 scale is logarithmic.
Where does costco.com's data come from?
Every number on costco.com's profile is read from MrKeyword's web graph (August–October 2026). This version uses data imported on 31 October 2026. How MrKeyword collects and labels this data.