FPN may mean:
- Family Nurse Practitioner
- Fountain Pen Network, a massive forum regarding fountain pens, and other pen-related topics.
- Fine Print Note, as used in engineering standards.
- Federated Portal Network, allows organizations with multiple portals, SAP and non-SAP, to share content between the portals.
- Feldpost number, an identification number for a German military unit during World War II used for military mail service.
- Filtered-popping network
- Fixed-pattern noise, a type of visual artifact
- Fixed Penalty Notice
- Frank Paul Nuuausala, a football player for the Sydney Roosters
- Family Pizza Night