Anastasios Tagis (Greek: Αναστάσιος Τάγης, 1839–1900) was a Greek scholar and philological teacher of the 19th century.

Tagis was born in Monodendri of Ioannina (then part of the Ottoman Empire) in 1839.^[1][2] He graduated from the Rizarios School of Athens and later from the Philolological School of the University of Athens where he was awarded the teacher of philology degree.^[2][3] He initially taught in the Gymnasium of Samos, after in Crete and then in Halki.^[1] In 1873, he founded, along with others, a Greek high school in Pera of Constantinople (officially Konstaniniyye) and taught in it with his brother, Filippos.^[4] Later, in 1869, he was elected a member of the Greek Philological Society of Constantinople (Ελληνικός Φιλολογικός Σύλλογος εν Κωνσταντινούπολει).^[5] He also taught in the Vasmatzidis School of Pera and in the famous Zografeion Lyceum.^[2]

He wrote interpretations of the Aristotelian definitions of tragedy, elegies, pindar odes and commented on Xenophon and the myths of Aesop.^[6] He spoke the Ancient Greek language fluently and completed a Delphic Hymn in 1894.^[6]

He died in 1900, at the age of 60 or 61.^[2][7]