Two other key demographics for 2016 are young voters: members of the
Millennial generation—defined in this report as those born in the years 1981
through 2000—and unmarried women. The 18-to-29-year-old age group, all of
which are Millennials, made up 15 percent of voters and voted 61 percent to 35
percent in President Obama’s favor in 2012. Moreover, that 15 percent figure
actually understated the level of Millennial influence in the 2012 election because
the 18-to-29-year-old group did not include the oldest Millennials—the 30- and
31-year-olds who were born in 1981 and 1982. Once they are figured in, a reason
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able estimate is that Millennials made up around 18 percent of the vote in 2012.
That figure should be significantly larger in 2016 as more Millennials enter the
voting pool. About 52 million Millennials were citizen-eligible voters in 2012,
and that number has been increasing at a rate of about 4 million a year. In 2016,
when Millennials make up the entire 18 to 35 age group, there will be 68 million
Millennial eligible voters, accounting for 31 percent of all eligible voters—the
same size as the Baby Boomer percentage of eligible voters.
Of course, relatively low youth turnout means that the weight of Millennials
among actual voters in 2016 will be significantly less than the generation’s share
of eligible voters. If turnout patterns remain roughly the same in 2016 as they
were 2012, a reasonable guess is that Millennials will make up approximately 25
percent of voters in the upcoming presidential election.