M68

M68 or M-68 may refer to:

Roads
 * M-68 (Michigan highway), a state highway in Michigan
 * M68 (Johannesburg), a short metropolitan route in Johannesburg, South Africa
 * Proposed road numbering for a section of the road built as the M66 motorway in the United Kingdom, now part of the M60

Other uses .
 * M68 (Motorola 68000), a CISC microprocessor
 * Miles M.68, a 4 engined development of Miles Aerovan
 * Soltam M-68, a 1968 155 mm 33 calibre towed howitzer manufactured in Israel
 * Messier 68, a globular cluster in the constellation Hydra
 * M68 Close Combat Optic, referring to the Aimpoint CompM2 or its later version the Aimpoint CompM4
 * M68 (tank gun)
 * iPhone (1st generation), Apple's first mobile device, which was originally codenamed as "M68"