INIS may refer to:

• Ennis, a town in County Clare, Ireland (Irish name: Inis)

• International Nuclear Information System, a collection of nuclear science information

• Iraqi National Intelligence Service

• iNiS Corporation, a Japanese video game developer

• Institut national de l'image et du son, a training institute in Montreal, Canada

• Irish Naturalisation and Immigration Service, an agency of the Irish government

• INIS character set, a subset of ASCII

See also

• Innis (disambiguation)

• INI (disambiguation)