Illinois, Lee County Records, 1830-1954 Description Naturalization and probate records from the Lee County courthouse in Dixon, Illinois. This collection is being published as images become available. How to Use this Collection » View Images in this Collection Browse through 274879 images Citing this Collection "Illinois, Lee County Records, 1830-1954." Images. FamilySearch. http://FamilySearch.org : 14 June 2016. Lee County Courthouse, Dixon.