* M-Base

* Madchester
* Madrigal
* Mafioso rap
* Maglaal (tuuli)
* Magnificat
* Mahori - type of Thai classical music
* Makossa
* Makossa-soukous
* Malagueñas
* Malawian jazz
* Malhun
* Maloya - traditional music from Réunion
* Maluf - evolved form of al-andalous classical music which developed in Constantine, Algeria
* maluka
* Mambo

* Manaschi - Kyrgyz folk music made by travelling musicians also called manaschi
* Mandarin pop - early Taiwanese pop sung in Mandarin and popular with young listeners
* Manding swing
* Mangue Bit - African style beat music style from Recife, Pernambuco, Brazil
* Mangulina
* Manikay
* Manila sound - Early 1970s development in Pinoy rock which mixed Tagalog and English lyrics
* Manouche
* Manzuma
* Mapouka
* Mapouka-serré

* Marabi
* Maracatu - African and Portuguese music popular around Recife, Brazil
* Marga - Indian classical music
* Mariachi - pop form of son jalisciense
* Marimba
* Marrabenta
* Martial industrial
* Maskanda - popularized Zulu-traditional music
* Mass
* Martinetes
* Matamuerte
* Mathcore
* Math rock
* Maxixe
* Mazurka - Martinican Music

* Mbalax
* Mbaqanga (township jive)
* Mbira (Chimurenga)
* Mbube
* Mbumba
* Medh
* Meditation
* Medieval folk rock
* Medieval metal
* Medieval music
* Mejorana
* Melhoun
* Melhûn
* Melodic black metal
* Melodic death metal
* Melodic hardcore
* Melodic metalcore
* Melodic music
* Melodic trance
* Memphis blues
* Memphis rap
* Memphis soul
* Mento
* Merengue
* Merengue típico moderno
* Merengue-bomba - Puerto Rican fusion of bomba and merengue
* Méringue
* Meringue
* Merseybeat
* Metalcore
* Metallic hardcore
* Mexican son - a broad group of Mexican folk music
* Meyjana
* Mezwed

* Miami bass (booty bass) (Bass music)
* Mini compas
* Mini-jazz
* Minuet
* Milongas

* Min'yo - Japanese folk music
* Mineras
* Mini-jazz - Caribbean jazz
* Minimalist music
* Minimalist trance
* Minimal techno
* Minimal wave
* Minstrel show
* Minneapolis sound
* Mirolóyia

* Modinha
* Modern classical music
* Modern Laika
* Modern Rock
* Modinha
* Mohabelo - neo-traditional music from South Africa and Lesotho
* Mor lam - Laotian and Thai ensemble music for vocals with accompaniment
* Mor lam sing - popular form of Laotian traditional music developed by Laotians in Thailand
* Motown
* Montuno
* Morna
* Mozambique
* MPB (música popular brasileira) - catch-all term for multiple varieties of Brazilian pop music

* Mugam - classical music of Azerbaijan, featuring sung poetry and instrumental passages
* Murga - Uruguayan street carnival dance with heavy percussion, also popular in Argentina.
* Musette
* Mushroom Jazz
* Music drama
* Music Hall
* Music noir
* Música campesina - Cuban rural music
* Música criolla - a coastal Peruvian music from the early 20th century, consisting of a variety of Western fusions
* Música de la interior - indigenous folk music from Colombia
* Música llanera - harp-based form of folk music from Los Llanos, Colombia
* Música nordestina - Northeast Brazilian popular music, centered around Recife
* Música tropical - a form of Colombian salsa music
* Musiqi-e assil - Persian classical music
* Musique concrète (also known as electroacoustic music)
* Mutuashi
* Muwashshah
* Muzak (or elevator music)