Cook County Property Taxes Increased in 2025: What the Numbers Mean for Homeowners Cook County’s total property-tax burden increased 3.9% for tax year 2025, exceeding both Chicago-area and national inflation. The largest regional increase was concentrated in the north and northwest suburbs, but individual tax bills vary considerably. Homeowners concerned about an increase should check their exemptions, property record, assessed value and applicable appeal deadlines. The countywide numbers Cook County property owners will pay approximately $19.9 billion in property taxes for tax year 2025, payable in 2026. That represents an increase of approximately $743.8 million, or 3.9%, over the previous year. For comparison, Chicago-area inflation was approximately 3.1% during 2025.…