Kaylynn Martinez was a 13-year-old middle school student who disappeared from Pleasantville, New York. She was last seen on April 19, 2012, at the Mount Pleasant-Union Free School and did not return home or make contact with her family.

Kaylynn is described as White/Caucasian or Hispanic, with brown hair and brown eyes, standing between 58 and 59 inches tall and weighing between 140 and 165 pounds at the time she vanished. The community distributed flyers and made public appeals, yet the case eventually grew cold and remains open.