2026 Property Tax Due Dates
Varies (Cook Co.: March 1)
First installment (varies by county)
Varies (Cook Co.: August 1)
Second installment
Payment Methods
Online, Mail, In-Person
Lake County Treasurer
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Lake County Treasurer
In Person
Visit the Treasurer's office — 18 N County St, Waukegan IL 60085, Mon-Fri 8am - 5pm
Other Counties in Illinois
About Lake County
Lake County is a county located in the northeastern corner of the U.S. state of Illinois, along the shores of Lake Michigan. As of the 2020 census, it has a population of 714,342, making it the third-most populous county in Illinois. Its county seat is Waukegan, the tenth-largest city in Illinois.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
Get Deadline Reminders
We'll email you a fortnight before your property taxes are due.
Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.