8 years old
In Illinois, it does not matter what the child's age is nor does it matter about height or weight, all that matters is that the child is in proper seat belt Child Passenger Protection Act (See link below)
A 9 year old child can ride in the front seat of a car. It is important that they are buckled in and can sit still.
the child should be at least 9 to ride in the front seat
Its based on height not age.
Your too young