Neis can refer to:
Neis, a genus of nudan ctenophores Neis, daughter of Zethus or Amphion. The Neitian gate at Thebes, Greece was believed to have derived its name from her. Barbara Neis (born 1952), Canadian social scientist Bernie Neis (1895–1972), American baseball player Fabrício Neis (born 1990), Brazilian tennis player Reagan Dale Neis (born 1976), Canadian actress
See also Nei (disambiguation)