Thelogothetēs tōn oikeiakōn (Greek:λογοθέτης τῶν οἰκειακῶν), originally theepi tōn oikeiakōn (ὁ ἐπὶ τῶν οἰκειακῶν) was aByzantine official with varying duties.

Theoikeiakoi (fromοἰκειακός, "belonging to the household") were a class of senior imperial household officials attested in the 9th and 10th centuries. The position of a head of this class (epi tōn oikeiakōn means "in charge of theoikeiakoi") appeared possibly in the 10th century, based on sigillographic evidence, or at any rate before circa 1030.^[1] His exact functions are unclear:Rodolphe Guilland considered him the successor of theepi tou eidikou as the head of the imperial private treasury,^[2] whileNicolas Oikonomides thought that he administered the Byzantine emperor's private domains. The post was often combined with other positions, and fulfilled a range of judicial and fiscal duties. In thePalaiologan period, it became thelogothetēs tōn oikeiakōn, who exercised mainly diplomatic and judicial duties.^[1] According to theBook of Offices ofpseudo-Kodinos, compiled around the middle of the 14th century, thelogothetēs tōn oikeiakōn occupied the 39th place in the imperial hierarchy, between thepraitōr tou dēmou and themegas logariastēs,^[3] but held no official function.^[4] His court uniform consisted of aturban (phakeōlis) and an overcoat calledepilourikon.^[5]

• Protovestiarios

• Guilland, Rodolphe (1971)."Les Logothètes: Etudes sur l'histoire administrative de l'Empire byzantin" [The Logothetes: Studies on the Administrative History of the Byzantine Empire].Revue des études byzantines (in French).29:5–115.doi:10.3406/rebyz.1971.1441.
• Kazhdan, Alexander, ed. (1991).The Oxford Dictionary of Byzantium. Oxford and New York: Oxford University Press.ISBN 0-19-504652-8.
• Verpeaux, Jean, ed. (1966).Pseudo-Kodinos, Traité des Offices (in French). Centre National de la Recherche Scientifique.