Illinois State Fair 2025 Dates. Illinois state fair 2025 is held in springfield il, united states, from 8/7/2025 to 8/7/2025 in illinois state fairgrounds. Just inside the main gate you will find the iconic giant slide.
Illinois state fair 2025 is held in springfield il, united states, from 8/7/2025 to 8/7/2025 in illinois state fairgrounds. To midnight for the duration of the fair.