Enoch Malachi "Nucky" Thompson is a fictional character and the protagonist of the HBO TV series Boardwalk Empire, portrayed by Steve Buscemi. Nucky is loosely based on former Atlantic City, New Jersey political figure Enoch Lewis "Nucky" Johnson.

Boardwalk Empire is an American period crime drama television series created by Terence Winter and broadcast on the premium cable channel HBO. The series is set chiefly in Atlantic City, New Jersey, during the Prohibition era of the 1920s and stars Steve Buscemi as Nucky Thompson. Winter, a Primetime Emmy Award-winning screenwriter and producer, created the show, inspired by Nelson Johnson's 2002 non-fiction book Boardwalk Empire: The Birth, High Times, and Corruption of Atlantic City, about the historical criminal kingpin Enoch L. Johnson.