Yes, Alan Arkin is a Jew. Arkin is an actor, director, musician and singer known for his roles in Wait Until Dark, Catch-22, The In-Laws, Edward Scissorhands, Little Miss Sunshine, for which he won an Academy Award for Best Supporting Actor and Argo.
Arkin was born in Brooklyn, New York City. He is the son of Beatrice, a teacher, and David I. Arkin, a painter and writer who mostly worked as a teacher. Arkin was raised in a Jewish family. His grandparents were immigrants from Odessa, Ukraine, Russia, and Germany. Arkin's family moved from Brooklyn to Los Angeles when Arkin was 11 years old.
Arkin began taking acting lessons at age 10 and has been acting ever since. He is one of only a few actors to receive an Academy Award nomination for Best Actor for his first film appearance, The Russians Are Coming, the Russians Are Coming.