[Illinois Assessors]

DeKalb County, Illinois - Assessor's Office

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

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

200 N Main StreetThe DeKalb County Assessor's Office is located in Sycamore, Illinois. Sycamore is the county seat of DeKalb County, where most local government offices are located.

DeKalb County Assessor Contact Information

Additional DeKalb County Information

DeKalb 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 DeKalb County Tax Assessor may also serve as the DeKalb County Tax Appraiser.

  1. The DeKalb County Tax Assessor is responsible for setting property tax rates and collecting owed property tax on real estate located in DeKalb County.
  2. The DeKalb 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 DeKalb County Tax Collector is responsible for collecting property tax from property owners. They issue yearly tax bills to all property owners in DeKalb County, and work with the sheriff's office to foreclose on properties with delinquent taxes.

When contacting DeKalb County about your property taxes, make sure that you are contacting the correct office. You can call the DeKalb County Tax Assessor's Office for assistance at 815-895-7120. 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 DeKalb County assessor's office at 815-895-1684. Please call the assessor's office in Sycamore before you send documents or if you need to schedule a meeting. If you have general questions, you can call the Legislative Center at 815-895-7189.

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The median property tax in DeKalb County, Illinois is $4,267.00

illinois Property Tax Data All of the DeKalb County information on this page has been verified and checked for accuracy.
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