M55 or M-55 may refer to:

Military M55 (rocket), a nerve agent-filled American Cold War-era rocket Myasishchev M-55, a Soviet reconnaissance aircraft M55 self propelled howitzer, an American self-propelled artillery piece M55 machine gun trailer mount, an American quadruple .50 caliber machine gun system based on the M45 Quadmount Zastava M55, a Yugoslav/Serbian anti-aircraft gun Tikka M55, a Finnish rifle M55, a folding stock version of the M50 Reising submachine gun M-55S, a Slovenian tank, a modernization of the T-55 M55 helmet, a Finnish variant of the Stahlhelm

Science and technology Messier 55 (M55), a globular cluster in the constellation Sagittarius M55, a Samsung Sens laptop computer model Samsung Galaxy M55 5G, a mid-range Android-based smartphone Siemens M55, a mobile phone Cortex-M55, an ARM Cortex-M processor core ThinkCentre M55, a ThinkCentre M series PC

Transportation M55 (New York City bus), a New York City Bus route in Manhattan

Roads M55 motorway, a road in Lancashire, United Kingdom, connecting Blackpool and the M6 at Preston M55 highway (Russia), a 1113 km road connecting Irkutsk and Chita M-55 (Michigan highway), a road in Michigan connecting Lake Huron and Lake Michigan M55 (Cape Town), a Metropolitan Route in Cape Town, South Africa

Other uses M 55, an age group for Masters athletics

See also

MLV (disambiguation) Model 55 (disambiguation)