Niy or niy can refer to:

  • Ngiti language, a language spoken in the Democratic Republic of the Congo, by ISO 639-3 code
  • Niya Kingdom (also spelled "Niy"), an ancient kingdom in Syria mentioned around the 14th century BCE
  • NiY, one of the nickel compounds in chemistry
  • Niy, a place where ancient Egyptian pharaoh Thutmose I was said to have gone elephant hunting

See also edit