Constantin Eustathiades

{{Short description|Greek jurist (1912–1979)}}

Constantin Eustathiades ({{langx|el|Κωνσταντίνος Ευσταθιάδης}}; Athens, 1912 – Athens, 29 June 1979) was a Greek jurist.{{Cite web|url=https://dodis.ch/P43734|title = Eustathiades, Constantin (1912–1979)|date = 29 June 1979}} He served on the European Commission of Human Rights from 1954 to 1970[https://www.echr.coe.int/Documents/Anni_Book_appendix_ENG.pdf Full list of members] (pp. 211–213) and the International Law Commission from 1967 to 1971.