Izzy (Isadore) Einstein was an American policeman during the alcohol prohibition era. He worked with fellow police officer Moe Smith in successfully shutting down illegal speakeasies and similar drinking establishments.

Izzy and Moe operated between 1920 and 1925 in New York. They were known for using disguises and made 4,392 arrests, of which 95% ended in convictions.

Their story was made into a film Izzy and Moe in 1985.