RTZ
RTZ may refer to:

RTZ (radio station), a radio time signal station in Irkutsk, Russia
 RTZ (band), an American rock band
 Return-to-zero, a signaling protocol that returns to its "zero" state between tokens
 Return to Zork, a 1993 adventure game in the Zork series
 Rio Tinto (corporation) (previously the Rio Tinto – Zinc Corporation), a British-Australian multinational metals and mining corporation
 RTZ, a 2009 compilation album by Six Organs of Admittance

See also
 Arteezy (born 1996), a Canadian professional Dota 2 player