Police say 7-year-old Lola Bella Cassidy was crossing the street in the 4100-block of Veteran Parkway when she was hit by a car.
She was taken to the hospital in stable condition with non-life-threatening injuries.
The suspect was driving a dark green-colored sedan.
They're asking anyone with information about the accident to contact the McHenry Police Department.
Cassidy was released from the hospital by Sunday.
