For more information, please contact:

Lake County Assessor (Property Valuations, Exemptions):    
18 N County Street - 7th Floor
Waukegan, IL 60085

(847) 377-2050  
assessor@lakecountyil.gov  
   
Lake County Clerk (Property Tax Rates, Sold Taxes):  
18 N County Street - Room 101
Waukegan, IL 60085
 
(847) 377-2404  
taxextension@lakecountyil.gov  
   
Lake County Treasurer (Tax Bills and Payments):  
18 N County Street - Room 102
Waukegan, IL 60085
 
847-377-2323  
treasurer@lakecountyil.gov  
   
Hours of Operations:           Monday - Friday : 8:30 am - 5:00 pm