According to the New Testament, Jesus was baptized by John the Baptist in the Jordan River.
The baptism is described in the Synoptic Gospels—Matthew, Mark, and Luke—and is also referenced in John’s Gospel. John the Baptist preached and baptized people in the Jordan region as a sign of repentance. When Jesus came to him, John initially expressed hesitation, but Jesus was baptized, and the event became a major scene in Christian tradition.
The Jordan River flows through the historic region east of Jerusalem and forms part of the boundary between modern Jordan and Israel and the Palestinian territories. It is not the same river as the Nile, which is associated with Egypt, or the Euphrates and Tigris, which lie farther east.
Christian traditions differ about the precise baptism location, but the river named by the New Testament is consistently the Jordan.