NIER or Nier can refer to:
- Nier (video game), a 2010 video game
- Nier: Automata, its 2017 sequel video game
- National Institute Economic Review, a British economics journal
- National Institute for Educational Policy Research (NIER), a Japanese national research institute for education sitting within MEXT.
- National Institute of Environmental Research, a national research center in Korea.
- Alfred O. C. Nier (1911-1994), American physicist
- The Nier Prize in meteoritics, named after him
- A god in the Arcanis Dungeons & Dragons setting
|This disambiguation page lists articles associated with the title Nier.
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