109 (disambiguation)

109 was a year of the Julian calendar, in the second century AD.

109 may also refer to:

• 109 (number), the integer following 108 and preceding 110
• 109 BC, a year of the pre-Julian Roman calendar
• 109 (department store), a department store in Shibuya, Tokyo, Japan
• 109 (MBTA bus), a bus route in Boston, Massachusetts, USA
• 109 (Messerschmitt Bf 109), a German World War II fighter plane.