TZ or tz may refer to:
Media The Twilight Zone, an American television anthology series Terezi Pyrope, a character from the webcomic Homestuck, frequently called "TZ" by her friend Sollux. Tz (newspaper), a German tabloid newspaper from Munich
Places Tappan Zee Bridge, New York, US Tappan Zee High School, a public high school in Orangeburg, New York, US Tanzania (ISO 3166-1 alpha-2 country code TZ)
Science and technology .tz, the country code top level domain (ccTLD) for Tanzania Time zone, a geographic region which uses a common clock time Tz database, also called zoneinfo or IANA Time Zone Database, a compilation of information about the world's time zones Saxitoxin, a chemical weapon with designation TZ in the US military Sony Vaio TZ, a model of personal computer Transformation Zone, a term used in cervical cancer therapy, the area of the cervix where dysplasia and abnormal cell growth occur TrustZone, a security extension to the Arm architecture of CPUs, implementing a type of Trusted Execution Environment Lexus TZ, a battery electric full-size luxury crossover SUV
Other uses tz, a digraph in linguistics, pronounced ATA Airlines (1973–2008, IATA airline code TZ) Scoot (2012–present, IATA airline code TZ until 2017)