Constantine Loukites was a Byzantine poet and court official of the Empire of Trebizond in the early 14th century. He served as protonotarios and protovestiarios for Emperor Alexios II, which made him effectively Alexios' prime minister.
The date of Loukites' birth is not known, although a marginal note states he came from Macedonia. He received his education in Constantinople; his teachers included Theodore Hyrtakenos. By 1301 he had arrived in Trebizond, for in November of that year he escorted emperor Alexios II in the campaign against the "Amitiotai", Turkomans from Diyarbakır (Amida), who had penetrated deep into Trebizond's territory to sack Kerasous (modern Giresun), the second most important city of the Empire.
One important relationship Loukites developed while living in Trebizond was with the astronomer Gregory Choniades: of Choniades' 16 surviving letters, four were to Loukites. Two surviving manuscripts, one a copy of the Iliad (Ambros. I 58 sup.) the other a copy of Thucydides (Vatican. Ottob. gr. 211), that had been part of Choniades' library, also bear Loukites' bookplates.
Loukites maintained a high position in the Imperial court into the reign of Emperor Basil; the latest evidence that he was still alive is a letter Nikephoros Gregoras wrote to him, dated between 1335 and 1340. His funerary inscription is reportedly in the Hagia Sophia of Trebizond, on the eastern side of the church in the arch behind the sanctum.
Two of his works have survived: