115 may refer to:

• 115 (number), the number
• AD 115, a year in the 2nd century AD
• 115 BC, a year in the 2nd century BC
• 115 (Hampshire Fortress) Corps Engineer Regiment, Royal Engineers, a unit in the UK Territorial Army
• 115 (Leicestershire) Field Park Squadron, Royal Engineers, a unit in the UK Territorial Army
• 115 (New Jersey bus)
• 115 (barge), a whaleback barge
• 115 km, rural locality in Russia
• The homeless emergency telephone number in France
• 115 Thyra, a main-belt asteroid

11/5 may refer to:

• 11/5, an American hip hop group from San Francisco, California
• November 5 (month–day date notation)
• May 11 (day–month date notation)
• {11/5}, a type of regular hendecagram

1/15 may refer to:

• January 15 (month–day date notation)