LaSalle County, IllinoisProperty records & tax offices
A direct property, payment, or map portal is not listed yet. Use the office contact below to find the right local service.
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Assessment appeal
- Within 30 days from publication of the assessment for the township where the property lies; the reviewed official page did not publish one countywide 2026 date.
Exemptions & appeals
View exemption application (opens in a new tab)Senior relief
LaSalle County publishes the 2026 PTAX-340 Senior Assessment Freeze form. The county page states that first-time exemption applications must be notarized and accompanied by photo ID, while PTAX-340 no longer needs notarization.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.
More exemption & appeal guidance →