DZ, Dz, or dz may refer to:
Businesses and organizations DarkZero Esports, an American esports organization Delftsche Zwervers, a Dutch student society and rover crew Delta Zeta, a college sorority in the USA Discovery Zone, an American children's entertainment business from 1989 to 2001 and currently since 2020. Donghai Airlines, the IATA code for this airline.
In language Dz (digraph), used in Polish, Kashubian, Macedonian, Slovak, Esperanto, Hungarian, Dene Suline (Chipewyan) and the ILE romanization of Cantonese Dzongkha (ISO 639 alpha-2 code) Voiced alveolar sibilant affricate or , as in the English word "adze"
People John Drewienkiewicz, British soldier Dolph Ziggler, American professional wrestler
In science and technology dz, in calculus, notation for the differential of a variable z DZ, METAR code for drizzle
Other uses Algeria (ISO 3166-1 country code) .dz, Algeria's internet country code top-level domain (ccTLD) Demilitarized zone, a buffer zone between military powers Drop zone, as in a parachuting drop zone contraction for dozen Daşoguz (vehicle registration suffix DZ)