Philotheos (, "friend of God"), Latinized as Philotheus, may refer to:

People

Philotheus of Samosata (died 297), a companion in martyrdom of Romanus of Samosata Philotheus of Sinai () Philotheus, a Byzantine court official, the author of the Kletorologion treatise, written in 899 Philotheos (Coptic patriarch of Alexandria) (979–1003) Philotheus I of Constantinople ( – 1379), ecumenical patriarch of Constantinople Saint Philotheos (died 1380), Coptic martyr Philotheos (Greek patriarch of Alexandria) (1435–1459) Philotheus of Pskov (1465–1542), Russian abbot Philotheos Skoufos (between 1615 and 1625 – 1685) Philotheos Bryennios (1833–1917), Greek Orthodox metropolitan of Nicomedia Philotheus Boehner (1901–1955) Philotheos Zervakos of Paros (1884–1980), Greek Orthodox elder Philotheos Karamitsos of Meloa (born 1924), retired bishop of the Greek Orthodox Archdiocese of America Philotheus of Pemdje (?), priest killed along with Abadir and Iraja

Other Philotheos: International Journal for Philosophy and Theology, founded in 2001 and based at Belgrade Philotheou Monastery on Mt Athos

See also Filotije, Serbian variant