Nier or NIER may refer to:

Nier

Video game series Drakengard and Nier, a connected franchise of action role-playing games Nier (video game), 2010 action role-playing video game The protagonist of Nier, sometimes eponymously referred to as "Nier" by fans and series director Yoko Taro Nier: Automata, the 2017 sequel to Nier Nier Reincarnation, a 2021 Nier mainline game for mobile devices

Other uses Alfred O. C. Nier (1911–1994), American physicist The Nier Prize in meteoritics, named after him A god in the Arcanis, Dungeons & Dragons setting Nier (Martian crater), a crater on Mars Nier, Alberta, a community in Rocky View

Acronyms 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 South Korea

See also Niers