Costco Headquarters

Costco Wholesale Corporation runs its worldwide warehouse empire from a surprisingly low-key campus at 999 Lake Drive, Issaquah, WA 98027 — a suburb about 17 miles east of Seattle. Below you will find everything you need to reach the company: the corporate office address, the verified customer service phone numbers with their hours, the fastest support channels, and the escalation steps that actually work when a problem gets stuck — including Costco’s famous any-time membership refund.

Costco Headquarters Location and Contact Information

Costco Wholesale Corporation is headquartered at 999 Lake Drive, Issaquah, WA 98027. The company lists this address as its principal executive offices in its SEC filings, and it has called Issaquah home since 1996, when the home office moved from nearby Kirkland as the chain outgrew its old space. Roughly a dozen unassuming brick buildings around a pond house the buyers, accountants, and executives who run a quarter-trillion-dollar retail operation — famously frugal, right down to the modest offices.

A piece of trivia hides in that history: Costco’s private label, Kirkland Signature, is named after Kirkland, Washington — the company’s home before the 1996 move. The brand launched in 1995, the address changed a year later, and the name stuck.

Keep in mind that the corporate campus is an office location, not a warehouse — there is no membership desk, returns counter, or walk-in customer service at 999 Lake Drive. For anything involving your membership card, a return, or an order, your local warehouse or the phone numbers below will get you much further, much faster.

Phone Contacts

Costco runs separate phone lines for memberships, online orders, and its ancillary businesses, and calling the right one saves a transfer or two. These numbers and hours come from Costco’s official Give Us a Call page (all times Pacific):

• Member services (membership and warehouse questions): 1-800-774-2678 — Mon–Fri 6 AM–6 PM, Sat–Sun 8 AM–5 PM
• Costco.com online orders and Costco Logistics deliveries: 1-800-955-2292 — Mon–Fri 5 AM–8 PM, Sat–Sun 5 AM–7 PM
• Costco Business Center orders: 1-800-788-9968 — Mon–Fri 6 AM–5 PM
• Technical & warranty services (electronics support): 1-866-861-0450 — Mon–Sun 5 AM–8 PM
• Mail order pharmacy: 1-800-607-6861 — Mon–Fri 5 AM–7 PM, Sat 9:30 AM–2 PM

Customer Service and Support Channels

Phone is not the only way in. Costco’s online help center at customerservice.costco.com offers live chat during roughly the same hours as the order line, plus self-service tools for order tracking, returns, and membership changes. For anything tied to a physical purchase, the membership desk at any warehouse is often the fastest route of all — returns, card replacements, and membership upgrades or cancellations are all handled on the spot, with no receipt required for most returns because purchases are tied to your membership number.

On social media, Costco maintains verified accounts on Facebook and Instagram, but these are marketing channels first — never post your membership number publicly. One practical tip: the member services line answers fastest right at 6 AM Pacific on weekdays, the moment the lines open; mid-day Monday and weekend afternoons are the busiest windows.

Membership Options and Fees

Because nearly every Costco question eventually comes back to the membership card, it helps to know the current tiers. These are the U.S. annual fees Costco reports in its latest annual filing:

The Executive tier does most of the heavy lifting for the company — Executive members accounted for roughly 73.6 percent of worldwide net sales in fiscal 2025. Any membership question, upgrade, or downgrade can be handled at a warehouse membership desk or by calling 1-800-774-2678.

Company Background

Costco opened its first warehouse in Seattle in 1983, founded by James Sinegal and Jeffrey Brotman on a radical idea: charge a membership fee, mark almost nothing up, and sell a limited selection of quality goods in bulk. The concept itself traces back further — to Price Club, the San Diego pioneer that invented the membership warehouse in 1976. The two companies merged in 1993 as PriceCostco and took the Costco Wholesale name a few years later, moving into the Issaquah headquarters in 1996.

Today Costco is the world’s largest membership warehouse club, trading on the NASDAQ Global Select Market under the ticker COST. At the close of fiscal 2025 the company operated 914 warehouses worldwide — including 629 in the United States across 47 states, Washington, D.C., and Puerto Rico — employed about 341,000 people, and served 81 million paid members holding 145 million cards. Net sales reached $269.9 billion, and the U.S. and Canada membership renewal rate held at 92.3 percent — the single number that best explains the company’s durability.

Leadership

Ron Vachris has served as President and Chief Executive Officer since January 1, 2024 — a true Costco lifer who started as a forklift driver and worked his way through every major operations role. Costco Wholesale Corporation is incorporated in Washington State, the same state where it is headquartered; our Washington business search guide explains how to look up the company’s registration with the Secretary of State.

Key Office Locations

The Issaquah campus is the nerve center, but Costco’s footprint is global. The company operates in 14 countries — its largest markets outside the U.S. are Canada with 110 warehouses, Mexico, Japan, the U.K., and Korea — and runs regional buying and administrative offices to support each of them. In the U.S., a network of depots handles distribution, Costco Business Centers serve business members in select metros, and e-commerce fulfillment supports Costco.com and same-day delivery. None of these locations handle general customer service, which is centralized through the phone and chat channels above.

Dealing with Customer Complaints

Start with the standard channels: call 1-800-774-2678, use live chat, or take the issue to your warehouse membership desk, and keep a record of dates and names. Costco resolves most disputes at this level because its Risk-Free 100% Satisfaction Guarantee is unusually broad: the company will refund your purchase price on almost any product, and will cancel and refund your membership fee in full at any time if you are dissatisfied — no proration, no questions about timing. Any warehouse membership desk can process the refund, or member services can handle it by phone.

If the front line cannot resolve the problem, put the complaint in writing to the corporate office: Costco Wholesale Corporation, 999 Lake Drive, Issaquah, WA 98027. Written complaints to headquarters are logged and routed to an escalation team. Beyond that, you can file a report with the Federal Trade Commission at ReportFraud.ftc.gov and with your state attorney general — in Costco’s home state that is the Washington State Attorney General, whose consumer protection division forwards complaints to the company for a response. For unresolved money disputes, small-claims court remains an option of last resort.

Summary

Costco’s headquarters sits at 999 Lake Drive, Issaquah, WA 98027, though almost everything a member needs happens through other channels: 1-800-774-2678 for member services, 1-800-955-2292 for Costco.com orders, the warehouse membership desk for returns and refunds, and the FTC or your state attorney general if escalation ever becomes necessary. Looking for another company’s corporate contacts? Browse our other headquarters guides.

Frequently Asked Questions

Where is Costco’s headquarters located?

Costco Wholesale Corporation is headquartered at 999 Lake Drive, Issaquah, WA 98027, United States — about 17 miles east of Seattle.

What is Costco’s customer service phone number?

Call 1-800-774-2678 for member services (Mon–Fri 6 AM–6 PM PT, Sat–Sun 8 AM–5 PM PT) or 1-800-955-2292 for Costco.com online orders.

How do I contact the Costco corporate office?

Write to Costco Wholesale Corporation, 999 Lake Drive, Issaquah, WA 98027. The corporate office is not a warehouse — membership and order issues are handled by phone, chat, or at your local warehouse.

Who is the CEO of Costco?

Ron Vachris is President and Chief Executive Officer. He took over on January 1, 2024, after a career that began as a Costco forklift driver.

Who owns Costco?

Costco is a publicly traded company owned by its shareholders. Its stock trades on the NASDAQ Global Select Market under the ticker COST.

Can I really get my Costco membership fee refunded?

Yes. Under Costco’s Risk-Free 100% Satisfaction Guarantee, the company will cancel and refund your full membership fee at any time if you are dissatisfied. Visit any warehouse membership desk or call 1-800-774-2678.