John Hyrcanus was a Hasmonean (Maccabean) leader and Jewish high priest of the 2nd century BCE. In rabbinic literature he is often referred to as Yoḥanan Cohen Gadol, "John the High Priest".

The Hasmonean dynasty was a ruling dynasty of Judea and surrounding regions during the Hellenistic times of the Second Temple period, from c. 140 BCE to 37 BCE. Between c. 140 and c. 116 BCE the dynasty ruled Judea semi-autonomously in the Seleucid Empire, and from roughly 110 BCE, with the empire disintegrating, Judea gained further autonomy and expanded into the neighboring regions of Perea, Samaria, Idumea, Galilee, and Iturea. The Hasmonean rulers took the Greek title basileus ("king") as the kingdom became a regional power for several decades. Forces of the Roman Republic intervened in the Hasmonean Civil War in 63 BCE and made it into a client state, marking the decline of Hasmonean dynasty; Herod the Great displaced the last reigning Hasmonean client-ruler in 37 BCE.