Chief County Assessment Office

Wendy Ryerson

Chief County Assessment Officer

Joy Pitman, Office Manager
Carmen Bollman
Jennifer J. Boyd
Jennifer Diehl

The Chief County Assessment Office

The Chief County Assessment Office is responsible for providing instructions to township assessors that promote uniformity of assessments throughout the different districts. This office also administers property tax exemptions, property transfers, parcel map maintenance and serves as the clerk for the Board of Review. 

General Information

The Assessment Office is located on the first floor of the Old Lee County Courthouse.  Office hours are 8:00am to 4:30pm, Monday through Friday (except for holidays). 

Contact Information

Chief County Assessment Office
112 E. Second Street, Dixon, IL  61021
Phone:  815-288-4483
Email address:  This email address is being protected from spambots. You need JavaScript enabled to view it.

Wendy J. Ryerson

Wendy J. Ryerson, CIAO-I, has worked in the assessment office since 1986, serving first as a deputy assessor and then appointed as the Chief County Assessment Officer in 2000. She was awarded the Certified Illinois Assessing Officer designation in 1987, and the Certified Illinois Assessing Officer – Intermediate in 1996. Since 1996 Wendy has served as an instructor for the IL Property Assessment Institute, an organization dedicated to providing educational opportunities to assessment professionals throughout the state. She has served in numerous leadership positions, including President of the IL County Assessment Officers Association (2004-2005), President of the North Central Regional Association of Assessing Officials (2004-2005), and President of the IL Association of County Officials (2011). In March of 2006, Wendy was presented the Marshall Theroux Memorial Award in recognition of leadership and distinguished achievement in the Illinois assessment profession.