Every Costco email format we found
Share of 10 verified Costco work emails by pattern. Examples use a placeholder name, Jane Doe.
| Format | Share |
|---|---|
{f}{last}@costco.com | 60% |
{first}{last}@costco.com | 30% |
{f}{m}{last}@costco.com | 10% |
How to write a Costco email address
- Start with the person's first and last name as they write it on LinkedIn.
- Apply
{f}{last}@costco.com: Jane Doe becomesjdoe@costco.com. - If that bounces, try
{first}{last}@costco.com, which 30% of the sample uses. - Verify the address before you send, so a wrong guess doesn't bounce and hurt your sender reputation.
Teams
Departments across 200 Costco profiles with work emails.
Seniority
From the same 200 profiles, by job title.
Costco at a glance
- Industry
- Retail
- Headquarters
- Seattle, WA, US
- Employees
- 10,000+
- Revenue
- Over $1 billion
- Website
- costco.com
- Email domain
- @costco.com
Where they work
Most common employee locations in the sample.
Common Costco job titles
- Inventory Control Specialist
- Supervisor
- Software Developer
- Assistant General Manager
- Software Engineer
- Information Security Analyst
- Assistant Buyer
- Product Owner
Skip the guessing: get verified Costco emails
Search 6,769 Costco contacts by title, team and location, then export their verified emails.
Find Costco contactsCostco email FAQ
What is the email format for Costco?
Costco mostly uses {f}{last}@costco.com, so Jane Doe would be jdoe@costco.com. That pattern covers 60% of the 10 verified Costco emails we checked. The next most common is {first}{last}@costco.com (30%).
What email domain does Costco use?
Costco employees use @costco.com (100% of our sample).
How accurate is this Costco email format?
It is measured, not guessed: we matched 10 Costco work emails, verified between September 2026 and Invalid Date, against each person's name. Every address in the sample followed a name rule. A pattern tells you the likely address; verifying it tells you whether the mailbox exists.
How many Costco contacts are in Sendsets?
Sendsets has 6,769 Costco contacts with a work email, searchable by title, department and location.
Similar company email formats
How we measure: 10 Costco work emails last verified by Invalid Date were matched against each person's first and last name. Team, seniority and location figures come from 200 Costco profiles. No real employee names or addresses are shown on this page.