M23

M23, M.23 or M-23 may refer to:

Roads

 * M23 motorway, a motorway in England
 * M-23 (Michigan highway), a highway designation formerly used in Michigan
 * Highway M23 (Ukraine)
 * M23 (Cape Town), a Metropolitan Route in Cape Town, South Africa
 * M23 (Pretoria), a Metropolitan Route in Pretoria, South Africa
 * Federal Highway (Australia), part of which is given the designation "M23"

Other uses

 * M23 (New York City bus), a New York City Bus route in Manhattan
 * BFW M.23, two-seater sports plane
 * HMS M23, a Royal Navy M15-class monitor
 * The Mathieu group M23 in the mathematical field of group theory
 * M23 chemical mine, a US landmine
 * m23 software distribution system, a Linux software distribution and management system
 * McLaren M23, a race car
 * Messier 23 (M23), an open star cluster in the constellation Sagittarius
 * March 23 Movement (M23), a rebel group operating in the Democratic Republic of the Congo
 * M23 rebellion (2012–2013)
 * M23 offensive (2022–2023)
 * M23 derby, a football association match between Brighton and Hove Albion and Crystal Palace
 * Sako M23, a Finnish family of assault and battle rifles