TZ

TZ may refer to:

* The Twilight Zone
* time zone
* Sony Vaio TZ
* the tz database
* the IATA code for ATA Airlines
* a ligature of 't' and 'z' was a single letter in the Colonial orthography of the Yucatec Maya language [http://www.famsi.org/reports/96072/beltrangmr.htm Arte de el idioma maya reducido a succintas reglas, y semilexicon yucateco] , Father Pedro Beltrán, Mexico City, 1746]
* TZ, The chemical weapon designation of the United States military for saxitoxin, a bacterial sodium channel blocker
* the ISO 3166-1 alpha-2 country code for Tanzania

References