Snow White - 14 years old 
Cinderella - 16-19; an age is not specified, but getting married at a young age was common during her time and she was still living with her stepmother and two unmarried stepsisters at the time. 
Aurora - 16; the curse on her stated that she would prick her finger at this age. 
Ariel - 16; at the beginning of the film her father is holding a celebration for her 16th birthday. 
Belle - 17-21; her age is also not specified, but she lives at home with her father and the Beast is known to be 21, since his cursed rose only blooms until his 21st birthday. 
Mulan - 16; young Chinese women were sent to matchmakers around this age. 
Jasmine - almost 18; in the movie she is to be married by her 18th birthday. 
Pocahontas - 17ish; in reality, Pocahontas was only 12 when she was said to have met John Smith. The filmmakers made her older to allow for a romantic connection; however, she can’t be too old considering the film’s sequel and the fact that the real Pocahontas only lived until the age of 21. 
Tiana - 19; the film opens in 1912 with Tiana at age five, 14 years later, she is a 19-year-old waitress. 
Rapunzel - 18; her 18th birthday occurs during the film.