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Many King County facilities are closed to the public, and many services are being offered remotely. Learn more about changes and cancellations.  
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How to register

Registration is a 3-part process that takes about 20 minutes. You'll need your business tax ID number.

TIP:  Watch the video for step-by-step instructions.

Register Here

Already registered? Customize your account

Why register?

As a registered King County vendor, you can...

  • Sign up for email notices of new solicitations

  • Apply to participate in roster programs (unadvertised contracts)

  • Be featured in our online directory of approved vendors

  • Get priority when submitting quotes for purchases between $10,000 - $50,000

Small business certification

Small Contractor & Supplier (SCS) certification is like a gold star next to your name, making you eligible for special consideration.

You can register as a vendor and certify your small business to maximize your opportunities.

Certify Your Small Business

Contact Us

Phone: (206) 263-9400

TTY Relay: 711

Fax: (206) 296-7676