State Holidays 2025 Illinois Holidays. Illinois, united states of america public holidays in 2025 with dates and information on the origin and meaning of holidays. Full list of 2025 federal and regional public holidays and festivals observed in illinois, usa.

Day, lincoln’s birthday, washington’s birthday, memorial day, independence day,. In the state of illinois, the united states, there are 13 public holidays in 2025, and all of them fall on weekdays.