| Honorific Prefix: | Saint |
| Maccai | |
| Birth Place: | Ireland |
| Death Date: | 460 |
| Canonized Date: | Pre-congregation |
| Feast Day: | 11 April |
Saint Maccai (or Machai, Maccæus, Mahew) was an Irish missionary who founded a monastery on the Isle of Bute, Scotland. His feast day is 11 April.
The Monks of Ramsgate wrote in their Book of Saints (1921),
The hagiographer Alban Butler (1710–1773) wrote in his Lives of the Fathers, Martyrs, and Other Principal Saints under April 11,
John O'Hanlon (1821–1905) wrote of Babolin in his Lives of the Irish Saints under April 11.