Ports starting from: M
- Ma-Kung
- Maadiya Port
- Maaloy
- Maanshan
- Maasin
- Maassluis
- Maasvlakte
- Macabi
- Macapa
- Macassar
- Macau
- Macduff
- Maceio
- Machilipatnam
- Macin
- Mackay
- Macquarie Point
- Macun
- Macuro
- Macuse
- Madang
- Madras
- Madre Deus
- Madura
- Magadan
- Magdalla
- Magellan Strait Area
- Mago
- Mahajanga
- Mahakam River
- Mahe
- Mahmudia
- Mahon
- Mailiao
- Main Brook
- Mainz
- Maizuru
- Majene
- Majiahe
- Majunga
- Majuro
- Majuro
- Makar
- Makassar
- Makhachkala
- Malabo
- Malabrigo
- Malacca
- Malaga
- Malagari
- Malahayati
- Malay Cove
- Maldon
- Male
- Malhado
- Mali Losinj
- Malili
- Malindi
- Mallaig
- Malloco Bay
- Malm
- Malmo
- Malongo Terminal
- Malpe
- Mamonal
- Mamonal
- Mamoudzou
- Manado
- Manakara
- Mananjary
- Manati
- Manaus
- Manchester
- Manchester
- Manchester Ship Canal
- Mandal
- Mandraki
- Mandukio
- Mandvi
- Manfredonia
- Mangalia
- Mangalore
- Mangkasa Oil Terminal
- Maniitsoq
- Manila
- Manistee
- Manitowoc
- Mannheim
- Manokwari
- Manta
- Mantes
- Mantyluoto
- Manzanillo
- Manzanillo
- Manzanillo
- Manzanillo International Terminal
- Maocaojie
- Maoertuo
- Maoming
- Map Ta Phut
- Maputo
- Maputo
- Maqal
- Mar del Plata
- Maracaibo
- Marans
- Marathocampos
- Marathon
- Marathoupolis
- March Point
- Marcus Hook
- Mare Island
- Mariager
- Mariehamn
- Mariel
- Mariestad
- Marin
- Marin
- Marina di Carrara
- Mariupol
- Mariveles
- Marmaris
- Marmorilik
- Marquette
- Marrero
- Marsa al Hariga
- Marsa Bashayer Export Terminal
- Marsa El Brega
- Marsala
- Marsaxlokk
- Marsden Point
- Marseilles
- Marstal
- Marstrand
- Martinez
- Marugame
- Maryborough
- Marystown
- Marzamemi
- Masan
- Masao
- Masbate
- Masinloc
- Maslenica
- Masnedovaerkets Havn
- Massawa
- Matadi
- Matane
- Matanzas
- Matanzas
- Matarani
- Matarani
- Mategata
- Mati
- Matola
- Matsunaga
- Matsushima
- Matsuura
- Matsuyama
- Maumere
- Mawan
- Mawlamyine
- Mayaguez
- Maydown
- Mayotte
- Mayumba
- Mazara del Vallo
- Mazarron
- Mazatlan
- Mbaraki
- McDuffie Island
- Mckellar Island
- Medan
- Medgidia
- Medina
- Medway Ports
- Mega
- Megara Oil Terminal
- Meizhou
- Mejillones
- Melbourne
- Melilla
- Melilli Oil Terminal
- Mellos Harbour
- Melville
- Memphis
- Meneng
- Mengjiagou
- Menominee/Marinette
- Menzel Bourguiba
- Merak Petroleum Base
- Merauke
- Meraux
- Merca
- Merikarvia
- Mersa el Hamra
- Mersa Matruh
- Mersin
- Mersrags
- Mesaieed
- Mesolongi
- Messina
- Metas
- Meteghan
- Methil
- Metkovic
- Metkovic
- Metlakatla
- Meulaboh
- Mezen
- Miami
- Michipicoten Harbour
- Microlimano
- Middelburg
- Middelfart
- Middle Point
- Middlesbrough
- Midia Navodari
- Midland
- Midvaag
- Miike
- Milaki
- Milazzo
- Milford Docks
- Milford Haven
- Milner Bay
- Milos Island
- Milwaukee
- Mina Abdulla
- Mina Al Ahmadi
- Mina Al Bakr
- Mina al Fahal
- Mina Al Zour
- Mina Raysut
- Mina Salman
- Mina Saqr
- Mina Saud
- Mina Zayed
- Minamata
- Minatitlan
- Minatitlan
- Mindelo
- Minlagas
- Miquelon
- Miragoane
- Miramar Oil Terminal
- Miri
- Mishidu
- Mishima-Kawanoe
- Mission River
- Mississippi River
- Mistaken Island
- Mistley
- Misumi
- Misurata
- Mitajiri
- Mitsukojima
- Mitylene
- Miyako
- Miyazu
- Mizushima
- Mjanesholmen
- Mjimwema Oil Terminal
- Mkoani
- Mo I Rana
- Moa
- Moanda Oil Terminal
- Mobile
- Mocamedes
- Moengo
- Moerdijk
- Mogadiscio
- Mogpo
- Mohammedia
- Moji
- Mojiaoshang
- Mokha
- Mokpo
- Molde
- Moldova Noua
- Molfetta
- Mollendo
- Mombasa
- Monaco
- Monbetsu
- Moneypoint
- Monfalcone
- Mongla
- Mongstad
- Moni
- Monomeros
- Monopoli
- Monroe
- Monrovia
- Mont Louis
- Montague
- Montego Bay
- Montereau
- Montevideo
- Montgomery
- Montoir
- Montreal
- Montrose
- Morehead City
- Morlaix
- Mormugao
- Moron
- Morondava
- Moroni
- Morphou Bay
- Morrisville
- Morro Redondo
- Morro Redondo
- Morrow
- Mosjoen
- Moss
- Moss Landing
- Mossel Bay
- Mostaganem
- Mostyn
- Motril
- Moudi Terminal
- Moulmein
- Mourilyan
- Mozambique Island
- Mtwara
- Muara
- Mubarek Terminal
- Mubarraz Island
- Mucuripe
- Mudanya
- Muelles El Bosque
- Muhammad Bin Qasim
- Mukaishima
- Mukalla
- Mukho
- Mulgrave
- Mumbai
- Mundra
- Munganno Point
- Munguba
- Muntok
- Murmansk
- Muroran
- Muros
- Muscat
- Mushterak
- Muskegon
- Mustola
- Mutis
- Mutsamudu
- Muuga-Port Of Tallinn
- My Tho
- My Thoi
- Mykonos Island
- Myrtle Grove