Zack

Zack may refer to:

Characters

 * Zack (The Old Man and the Key); a resident at the Springfield Retirement Castle.
 * Zack de la Rocha; American musician.
 * Zack Greinke; major league baseball player.
 * Norbert "Zack" Van Houten; the Danish uncle of Milhouse Van Houten.

Behind the Laughter

 * Andrew Zack; score production coordinator.