In Utah, the legal height requirement to ride in the front seat is four feet nine inches. This means that if you are shorter than this, you will need to sit in the back seat. There are a few exceptions to this rule, however. If all of the following conditions are met, then someone who is shorter than four feet nine inches can ride in the front seat:
-The person has a disability that prevents them from sitting in the back seat
-The vehicle does not have a passenger side airbag
-There is no room left in the back seat