| Honorific Prefix: | Saint |
| Thalelæus | |
| Honorific Suffix: | Hermit |
| Birth Place: | Cilicia, Asia Minor |
| Death Place: | Syria |
| Feast Day: | 27 February |
Saint Thalelæus (or Thalilaeus Epiklautos, '''Θαλλελαίου'''; died) was a 5th-century Syrian hermit known for continuous weeping. His feast day is 27 February.
Saint Thalelæus was born in Cilicia in Asia Minor.He was ordained as a presbyter in the monastery of Saint Sabbas the Sanctified.He later moved to a graveyard beside a run-down pagan temple in Syria near Gabala, where he lived in a tent.Travellers passing by were afraid of the unclean spirits that haunted the place.The monk lived alone, praying day and night, and eventually drove away the demons.He built himself a tiny cramped hut where he lived for another ten years.Through his example and miracles he made many converts, who built a church in place of the pagan temple.He died about 460.
The sources used by modern scholars are the Ecclesiastical History by Theodoret and the Spiritual Meadow by John Moschus. Here passages from a few 18th- to 20th-century vitae collections, alphabetically by author.
Sabine Baring-Gould (1834–1924) in his The Lives Of The Saints wrote under February 27,
The hagiographer Alban Butler (1710–1773) wrote in his Lives of the Fathers, Martyrs, and Other Principal Saints under February 27,
William Hone in his Every Day Book, Or, A Guide to the Year wrote, under February 27,
The monks of St Augustine's Abbey, Ramsgate wrote in their Book of Saints (1921),