ZL

ZL may refer to:

Aviation

 * Hazelton Airlines (1953–2001; IATA: ZL)
 * Rex Airlines (founded 2002; IATA: ZL)
 * ZL, an unused aircraft registration prefix for New Zealand

Science, technology and mathematics

 * ZL, ITU prefix for New Zealand, in radio and television
 * Zorn's lemma, a proposition in set theory
 * ZL, a Mazda Z5 engine variant

Other uses

 * Polish zloty (sign: zł), the currency of Poland
 * z"l, a Jewish honorific for the dead
 * ZL, a fictional assistant to superhero Masked Marvel (Centaur Publications)