Øistein N. Monsen (born 1973) has worked as an investigative journalist and photographer since 2006. As a journalist for Dagbladet, he has won the IR Award and Data-Skup.

In 2025 he published the reportage book White Lines, Black Sheep – Cocaine, Crime Gangs and the Crown Princess’ Son, co-authored with Torgeir Krokfjord.