ZR, Zr, or zr may refer to:

Places by code

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  • Zaire, a central African country, 1971–1997 (reserved in ISO 3166)
  • Zrenjanin, a city in Serbia (on car license plates)

Science and technology

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  • Zirconium, symbol Zr, a chemical element
  • Zona reticularis, an anatomical feature of the adrenal cortex
  • .zr, an abolished Internet top-level domain

Transport

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Aviation

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Land transport

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Other uses

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