M87 or M-87 may refer to:

Military

  • M87 machine gun, a Yugoslav copy of the NSVT machine gun
  • M-87 Orkan, a Yugoslav rocket-artillery vehicle

Transportation

  • Tumansky M-87, a Soviet aircraft engine
  • M-87 (Michigan highway), a former state highway in Michigan, US
  • McDonnell Douglas MD-87, a passenger airplane

Other uses

  • Messier 87, a giant elliptical galaxy in the Virgo Cluster
  • M87*, a supermassive black hole at Messier 87's core
  • M87 Ray (α and β), the signature move of the character Zoffy from the Ultra Series of television shows; See List of Ultraman Ginga characters
  • "M87", the theme song for the 2022 film Shin Ultraman by Kenshi Yonezu.