From the Nielsen Newswire:
Millennials are one of the largest population segments in the U.S., totaling about 77 million, on par with Baby Boomers. And these young consumers are the largest segment of smartphone owners. In the second-quarter 2014, 85% of Millennials aged 18-24 own devices and 86% aged 25-34 own them, an increase from 77% and 80%, respectively, in second-quarter 2013.
While age plays a role in smartphone ownership, this technology doesn’t have a gender divide.
Men and women in the U.S. own smartphones almost equally, with 70% of men owning these devices and 72% of women as of the second-quarter 2014.