Flesch is a German surname and may refer to:
- Carl Flesch - Hungarian violinist and pedagogue
- Colette Flesch - Luxembourgian former politician and fencer
- Rudolf Flesch - Creator of Flesch Reading Ease test and co-creator of the Flesch-Kincaid Readability Test
- Siegfried Flesch - Austrian saber fencer
- Steve Flesch - American golfer