According to the Pew Research Center, millennials now make up roughly the same chuck of the eligible electorate as Baby Boomers.
Some of those millennials voted in Waukesha Tuesday.
Garrett DeMeyer, 26, said he thinks people in their late 20's and early 30's will have a significant impact on this election.
"It's getting more popular for young people to be interested in politics," DeMeyer said. "I think young people are getting more and more involved."
Rebecca Noe, 32, said many millennials are choosing not to vote because they're displeased with both major party Presidential candidates.
"I think my generation is more likely to not vote out of idealism," Noe said. "Based on my friend group, it seems if some people can't find the perfect candidate, I don't see a lot of compromise with them."
She added she felt it was important to do her civic duty.
"You may not like your dinner options, but you have to eat something," Noe joked.
It remains to be seen how many of the more than 69 million millennials old enough to vote, like DeMeyer and Noe, turn out to the polls Tuesday.
According to the Pew Research Center, only 46% of eligible, millennial voters cast ballots in the 2012 Presidential election. In 2008, the number was 50%.