Mraz or Mráz is a Slavic surname (meaning "frost"), it may refer to:
- Franjo Mraz, Croatian artist
- George Mraz, jazz bassist
- Gustáv Mráz, Slovak footballer
- Jason Mraz, American singer-songwriter
- Ladislav Mráz, Czech opera singer
- Patrik Mráz, Slovak footballer
- Pavel Mráz, Czech canoer
- Peter Mráz, Slovak footballer
- Rani Mraz, Yugoslav rock band
- Aircraft
- Beneš-Mráz, airplane manufacturer
- Mráz Sokol, manufactured by Benes
- Mráz Skaut, manufactured by Benes
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