United States
males age 16-49: 60,388,734
females age 16-49: 59,217,809 (2010 est.)
Uruguay
males age 16-49: 713,223
females age 16-49: 697,197 (2010 est.)
Uzbekistan
males age 16-49: 6,456,675
females age 16-49: 6,658,475 (2010 est.)
Vanuatu
males age 16-49: 42,450
females age 16-49: 43,894 (2010 est.)
Venezuela
males age 16-49: 5,504,152
females age 16-49: 5,976,339 (2010 est.)
Vietnam
males age 16-49: 20,153,269
females age 16-49: 20,980,830 (2010 est.)
Virgin Islands
males age 16-49: 17,675
females age 16-49: 21,070 (2010 est.)
Wallis and Futuna
males age 16-49: 3,326
females age 16-49: 3,305 (2010 est.)
West Bank
males age 16-49: 562,570
females age 16-49: 531,532 (2010 est.)
Western Sahara
males age 16-49: 76,483
females age 16-49: 83,988 (2010 est.)