FNX may refer to:
- WFNX, an alternative rock radio station from Boston, Massachusetts
- Quadra FNX Mining, a mining company based out of Toronto
- FN Herstal FNX, a model of autoloading semi-automatic pistol available in various calibers
- FNX Network, an Australian based general interest collaborative blog started in 2010.
- First Nations Experience (FNX), the first U.S. Native American broadcast television network (founded 2011).