FY

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>)