Online Vendor Registration
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.
Already registered? Customize your account
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