When I typed in the words voting + college age people on google.com, one of the first sites that come up was a sociology website that spoke on the issue that most college aged adults from 18-24 do not vote. It was a question and answer section of the website. The girl was saying that many of the young people that she had interviewed said that politics was boring or that they weren't brought up in what you would consider a political household, or that they just didn't care.
She also said that as a politically-minded student, all of those excuses were difficult for her to understand. Finally, she asked if there were other, more subtle, sociological forces that may contribute to this lack of participation.
The person answering said that his best guess was that a lot of college age kids don't think that their vote matters. One of so many, how could it make a difference?
I agree with what both of these people had to say. Too many of our ancestors died so that we could the privilege to vote. If we don't vote it's like they died in vain. Remember, voting is a privilege, not a right.