FNS
FNS stands for
- Finnish Navy Ship , name prefix for ships of the Finnish Navy
- Free Network South , an umbrella organization for right-wing extremist comradeships in Bavaria
- Fridtjof Nansen School Flensburg
- Fridtjof-Nansen-Schule (Hanover) , school in the listed school building in Hanover, Vahrenheide district
- Forza Navale Speciale , an association of the Italian Navy during World War II
- Ferrovia Norte-Sul , a Brazilian rail company
- Fonds national suisse de la recherche scientifique or Fondo nazionale svizzero per la ricerca scientifica , the Swiss National Fund for the promotion of scientific research
- food neophobia scale , a scale for classifying food neophobia
- Food and Nutrition Service , part of the United States Department of Agriculture
- Niederselters station (DS100 code), station on the Main-Lahn-Bahn
