State of Illinois Property Tax Lasalle County Assessor

How can I contact Lasalle County?

If you need access to property records, deeds, or other services the Lasalle County Assessor's Office can't provide, you can try contacting the Lasalle County municipal government. The Lasalle County seat can be found in the County Courthouse in Ottawa. You can contact Lasalle County with general inquiries using the contact info listed below.

County Courthouse
707 E Etna Rd
Ottawa, IL 61350-1047
Lasalle County Contact Info:
(815) 434 8200 (Phone)
(815) 434 8250 (Fax)

For more details about taxes in Lasalle County, or to compare property tax rates across Illinois, see the Lasalle County property tax page.