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How do I register?

Registration takes about 20 minutes. You'll need your business tax ID number.

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

Register Here

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Why register?

Registering as a vendor maximizes your opportunities to do business with King County. 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
Contact Us

Phone: (206) 263-9400

TTY Relay: 711

Fax: (206) 296-7676