Voter turnout in the United States presidential elections
Recent decades have seen increasing concern over the fact that youth voting turnout is consistently lower than turnout among older generations. Several programs to increase the rates of voting among young people—such as MTV's "Rock the Vote" (founded in 1990) and the "Vote or Die" initiative (starting in 2012)—may have marginally increased turnouts of those between the ages of 18 and 25 to vote. However, the "Stanford Social Innovation Review" found no evidence of a decline in youth voter turnout. In fact, they argue that "Millennials are turning out at similar rates to the previous two generations when they face their first elections."
Youth vote in the United States
The voting process has two steps. An eligible voter - a U.S. citizen over the age of 18 - must first register to vote and then commit the act of voting. The voting process is regulated by each state individually and therefore varies from state to state.
The process of registering to vote is different depending on the state. Pre-registration is available to youth under the age of 18 in 20 states and Washington D.C. Potential voters may also register on Election Day - or on the day on which they vote early - in 10 states and Washington D.C. This may be done at the polling place or at an election official's office. Residents of the 40 states which do not allow same day registration require potential voters to register by a deadline, typically from eight to 30 days out from the election. Over half of the states in the U.S. offer some sort or online voter registration. This consists of the same process as a paper registration form, only it is digital on the internet and send to election officials to review over the web. This process was first introduced in Arizona in 2002. 
There are different regulations on the time and avenue through which a citizen can vote. Early voting is available in 33 states and Washington D.C. This must be done in person at a designated polling place. Early voting period lengths vary from state to state. If a potential voter is not able to vote in person on Election Day or during the early voting period, they may request an absentee ballot. In 20 states, an excuse must be filed to receive the absentee ballot. In 27 states and Washington D.C., a voter may acquire an absentee ballot without an excuse. In Washington, Oregon and Colorado all voting is done through the mail. A ballot is mailed to the voters residence and after the voter fills it out, he/she may mail it back. No in person polls are conducted. Otherwise, the typical voting period is twelve hours on a weekday at which time voters must go to the polls in person and cast their votes.