315 (disambiguation)

315 may refer to:

• 315 (year)
• 315 BC, a calendar year
• 315 (number), the natural number following 314 and preceding 316
• Project 315, a nonprofit in Israel
• NGC 315, an elliptical galaxy
• 315th Operations Group, a military unit
• 315th Air Division, a military unit
• 315th Airlift Wing, a military unit
• 315th Cyberspace Operations Squadron, a military unit
• 315th Rifle Division (Soviet Union), a former military unit
• 315th Fighter Squadron, a military unit
• 315 Constantia, a main-belt asteroid
• 315 series, a Japanese train type
• NCR 315, a 1962 second-generation computer