Hywel is a Welsh masculine given name. It may refer to:
- Hoel, king of Brittany in Arthurian legend
- Saint Hywel, a sixth-century disciple of Saint Teilo
- Hywel ap Rhodri Molwynog, 9th century king of Gwynedd
- Hywel Dda (died 950), or Hywel the Good, king of much of Wales, from Deheubarth
- Huwal of the West Welsh, 10th century Welsh king, possibly identical to Hywel Dda
- Hywel ab Owain Gwynedd (died 1170), Welsh poet and military leader
- Hywel Bennett (born 1944), Welsh actor
- Hywel Harris (1714-1773), a Welsh Methodist preacher.