Christian O'Sullivan (born 22 August 1991) is a Norwegian handball player who plays for SC Magdeburg and the Norwegian national team.

[1][2] He is currently the captain of the Norwegian national team.

He participated at the 2019 World Men's Handball Championship.

[3] O'Sullivan began his career in the Norwegian club Bækkelagets SK.

In 2016, O'Sullivan moved to German club SC Magdeburg.