[New York Assessors]

Onondaga County, New York - Assessor's Office

The Onondaga County Assessor is responsible for appraising real estate and assessing a property tax on properties located in Onondaga County, New York. You can contact the Onondaga County Assessor for:

  • Information on your property's tax assessment
  • Reporting upgrades or improvements
  • Paying your property tax
  • Your property tax bill
  • Checking the Onondaga County property tax due date
  • Appealing your property tax appraisal

421 Montgomery StThe Onondaga County Assessor's Office is located in Syracuse, New York. Syracuse is the county seat of Onondaga County, where most local government offices are located. The assessor's office is located in the same building as the John H Mulroy Civic Center, at 421 Montgomery Street.

Onondaga County Assessor Contact Information

Additional Onondaga County Information

Onondaga County Assessor's Office Services

There are three major roles involved in administering property taxes - Tax Assessor, Property Appraiser, and Tax Collector. Note that in some counties, one or more of these roles may be held by the same individual or office. For example, the Onondaga County Tax Assessor may also serve as the Onondaga County Tax Appraiser.

  1. The Onondaga County Tax Assessor is responsible for setting property tax rates and collecting owed property tax on real estate located in Onondaga County.
  2. The Onondaga County Property Appraiser is responsible for determining the taxable value of each piece of real estate, which the Tax Assessor will use to determine the owed property tax.
  3. The Onondaga County Tax Collector is responsible for collecting property tax from property owners. They issue yearly tax bills to all property owners in Onondaga County, and work with the sheriff's office to foreclose on properties with delinquent taxes.

When contacting Onondaga County about your property taxes, make sure that you are contacting the correct office. You can call the Onondaga County Tax Assessor's Office for assistance at 315-435-2426. Remember to have your property's Tax ID Number or Parcel Number available when you call!

If you have documents to send, you can fax them to the Onondaga County assessor's office at 315-435-2421. Please call the assessor's office in Syracuse before you send documents or if you need to schedule a meeting. If you have general questions, you can call the John H Mulroy Civic Center at 315-435-2070.


Learn More

Find the tax assessor for a different New York county

Find property records for Onondaga County

The median property tax in Onondaga County, New York is $3,237.00


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