On June 16, 2026, the Illinois Department of Revenue (DOR) announced that the final 2025 Cook County Equalization Factor is 3.0300. This final 2025 Cook County Equalization Factor is almost identical (-.18%) to the 2024 Cook County Equalization Factor of 3.0355. The final 2025 Cook County Equalization Factor is 5.64% higher than the tentative 2025 […]
