Stachys the Apostle (Greek: Στάχυς, "ear-spike"; died 54) was the second bishop of Byzantium, from 38 to 54 AD according to tradition.

Stachys is mentioned just one time in the New Testament as a person loved by Paul the Apostle (Romans 16:9).

Eusebius quotes Origen as saying that Andrew had preached in Asia Minor and in Scythia, along the Black Sea as far as the Volga and Kiev, hence he became a patron saint of Romania and Russia.

According to tradition, Saint Andrew founded the See of Byzantium in 38, installing Stachys as bishop,[4] a position he held for sixteen years.

16:9),[2] but he is always associated in traditions with five other apostles (Ampliatus, Urban of Macedonia, Apelles of Heraklion, Aristobulus of Britannia and Narcissus of Athens) that are the very same names mentioned together with him by Paul in Romans 16:8–11.