Kosh may refer to:
- John Kosh, an album cover designer and art director
- Kosh, Armenia, a town in Armenia
- Kosh Naranek, a fictional character in the Babylon 5 television series
- KOSH, the ICAO code for Wittman Regional Airport
- Kosh otaman, the highest military rank of the Ukrainian Zaporizhian Cossacks in the 16-18th centuries
- A slang term for a joint (cannabis), or a variation of one