Can you drop out of high school at 17 in Missouri without parental permission?

Sure, a lot of people do it. All you need to do is take extra classes and graduate early then you can go straight to college. In fact I know someone who started college in Missouri at 17. No problem. * No. Regardless of the required age for compulsory education the student needs permission from their parents or legal guardian to leave school before the age of 18.