DZ or dz may refer to:
- Delftsche Zwervers, a Dutch student society and rover crew
- Delta Zeta, a college sorority in the USA
- Dimension Zero (Swedish band), a melodic death metal band
- Discovery Zone, a playland and birthday party place for kids similar to Chuck E. Cheese's that went out of business in the late-1990s
- Dread Zeppelin, a reggae influenced Led Zeppelin cover band fronted by an Elvis impersonator
- Drop zone, as in a parachuting drop zone
- Dragonball Z, a TV series
- The differential of z
- Nick Nemeth, American professional wrestler also known as Dolph Ziggler
In languages dz may represent:
- Dzongkha language ISO 639 alpha-2 code
- Dz (digraph), a digraph in the Polish, Macedonian, Slovak and Hungarian alphabets
- the voiced alveolar affricate or, as in the English word "adze"
- Dz or dz, is a digraph in the Esperanto alphabet, representing the uncommon voiced affricate as in edzo "husband", it does not have a distinct letter in the orthography, unlike its voiceless counterpart which is spelled with the single letter "c" )
As a code DZ or dz may represent:
- Algeria 2-letter ISO 3166-1 country code
- the METAR code for Drizzle