Leibby Kletzky was reportedly last seen after leaving the Boyan Day Camp on 44th Street at around 5 p.m. Monday.
He is described by a local paper as having light brown hair, black glasses and was wearing a grey and light blue striped shirt, navy pants, black sneakers, a blue knapsack with the words 'Nechmod Day Camp' at the time of his disappearance.
The NYPD says a search is underway for the boy.
If you have seen the boy or know his whereabouts, contact police.