Fy or FY may refer to:

Aerospace

  • Convair XFY Pogo, an experimental aircraft
  • Fengyun, a series of Chinese weather satellites
  • Firefly (airline), Malaysia (IATA code: <code>FY</code>)

Places

  • FY postcode area, England
  • North Macedonia (NATO country code:<code>FY</code>)
  • Fengyang, China

Science

  • Yield strength, of a material
  • Duffy antigen system (International Society for Blood Transfusion code: <code>FY</code>), a classification of human blood groups
  • Feynmanium, or untriseptium

Other uses

  • Fushigi Yûgi, a manga (1991–1996)
  • Fiscal year, in business
  • West Frisian language, spoken in the Netherlands (ISO 639-1: <code>fy</code>)