Assessment

Kristi Poler, Supervisor of Assessments

Mason County Courthouse
125 N. Plum St
Havana, IL 62644-0077
Phone: 309-543-4775, option 4

2025 Board of Review Appeal Deadline 11/24/2025

Useful Links

• GIS Map
• Property Tax Search / Parcel Data
• Mason County Non-Farm Sales
• Illinois Department of Revenue
• Illinois Supervisor of Assessments
• Parcel Shape Files
• Board of Review Rules