County Seal
Nassau County Home Contact Us

"The one-stop guide for business owners and employees"
City, Town & Village Governments
New York State Government
U.S. Government
Breadcrumb Start you are here >Home/Doing Business

Nassau County provides a new and comprehensive registration system for our suppliers. In doing so, we require certain pieces of key information. Please obtain the information listed below before starting the registration process:

  • Company Address Information
  • Organization Contact Information
  • Federal Employer Identification Number or Social Security Number
  • Service level option for automated and easy notifications What is service level?
  • Username and password

For assistance with registration, please contact us at  or 1-516-571-4200.

The registration is a multi-step process as follows:
1. View and Accept County Terms and Conditions
2. Enter Organization Information
3. Enter Remittance Contact Information
4. Enter Demographic Information
5. Assign Username and Select Level of Access
6. Review Confirmation
7. Login, Select Commodity Categories and Set Agency Requested Information
Important Notice: If you are an employee of Nassau County, please DO NOT register as a supplier with this system. If you have any further questions, please refer to the support contact information given above.