NISS
# NISS

NISS may refer to:

* National Intelligence and Security Service, an Ethiopian Government agency which gathers information and is tasked with preserving national interest.
* National Institute of Statistical Sciences, an American institute that researches statistical science and quantitative analysis
* the National Intelligence and Security Service, the former intelligence service of Sudan, renamed/reorganised in 2019 as the General Intelligence Service (Sudan)
* Nexus International School Singapore
* Nordic Institute of Stage and Studio
* Charles Niss (1861–1938), American politician and businessman
* Thorvald Niss (1842–1905), Danish painter
