Chrismie Aurilus, 17, of Ronkonkoma, was last seen on Friday, Feb. 21, according to the New York State Missing Persons Clearinghouse.
Aurilus was last seen wearing a black vest, a coat with gray sleeves, a white shirt, gray sweatpants, and sneakers.
She may be in New York City, officials said.
Anyone with information is asked to contact the Missing Persons Clearinghouse at 1-800-346-3543.
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