Yes. In Illinois, it counts as a hit and run if you damage someone’s parked vehicle and drive off without providing information, even if the vehicle was unoccupied and no one was hurt.
You have a duty to remain at the scene until you can exchange information with the owner. If you must leave before they return, you’re required to place a note on their vehicle with your information.
Otherwise, it could technically be considered a Class A misdemeanor hit-and-run. You could face imprisonment of up to one year and fines of up to $2,500. If the damage you caused to the other vehicle is worth more than $1,000, you could also face a license suspension of one year (625 ILCS 5/6-206).