FNV may refer to:
<!-- Until the "Fallout" article has both this abbreviation included, plus reliable sourcing therefor, it isn't included here IAW MOS:DABABBR.
- Fallout: New Vegas, a 2010 action role-playing game -->
- Federation of Dutch Trade Unions (), a national trade union centre in the Netherlands
- Fowler–Noll–Vo hash function, a non-cryptographic hash function
- Franco-Nevada (stock stickers: FNV), a Canadian gold-focused royalty and streaming company
- Furness Vale railway station (station code: FNV), on the Stockport, Disley and Whaley Bridge line in Derbyshire, England