Koruna (CSK) is a historic ISO 4217 currency code withdrawn from use, published by the SIX Group maintenance agency in List Three.
- Currency code: CSK
- Currency name: Koruna
- Record: Koruna; numeric code 200; withdrawn 1993-03; entity: CZECHOSLOVAKIA
- List: ISO 4217 List Three (historic currency codes)
- List published: 2026-01-01