About Us


Dave Ryan

Supervisor of Assessments

The Supervisor of Assessments is the coordinating arm for all tax assessment activity for Peoria County’s 88,816 parcels.

We oversee the work of local township assessors and act as a resource to these local offices, yet the township assessor has the primary responsibility for valuing property for assessment purposes.

This office is also where the Peoria County Board of Review conducts the assessment appeal process, with the Supervisor of Assessment’s staff serving as the support for the Board’s work.

Additionally, the Supervisor of Assessments:

  • Determines the equalization factors for each township.
  • Mails assessment notices
  • Publishes Assessment Information
  • Processes all homestead exemption applications.
  • Maintains mapping and mailing address information

Once the Peoria County Supervisor of Assessment’s Office and the Board of Review have completed their work for a given tax year, the assessment rolls are turned over to the County Clerk's Office for the calculation of the tax rates on each individual parcel. The Peoria County Treasurer’s Office then prints and mails tax bills.

Mission Statement

The mission of the Peoria County Supervisor of Assessment’s Office is to provide the public with top quality services by helping the public access information and understand the property assessment process. The Supervisor of Assessment’s Office applies the property tax law with integrity, efficiency and fairness.

Vision Statement

The Peoria County Supervisor of Assessment’s Office continually strives to be the lead property assessment agency in Illinois by working creatively through utilizing technology and serving the public in a courteous, professional and transparent manner. Customer service is our top priority.