A junction may variously refer to:

• In road transport, a road junction.
• In rail transport, a railroad/railway junction. See junction (rail).
• In electronics, a semiconductor P-N junction or a thermoelectric junction
• In cell biology, a cell junction.

Junction is also the name of some places in the United States:

• Junction, Illinois
• Junction, Texas
• Junction, Utah

Junction City is also a popular name:

• Junction City, Arkansas
• Junction City, Georgia
• Junction City, Illinois
• Junction City, Kansas
• Junction City, Kentucky
• Junction City, Louisiana
• Junction City, Missouri
• Junction City, Ohio
• Junction City, Oregon
• Junction City, Washington
• Junction City, Wisconsin

Grand Junction is also the name of a few places:

• Grand Junction, Colorado
• Grand Junction, Iowa
• Grand Junction, Michigan