Regions of Papua New Guinea
- Matupit Island (historical)
- Matupit Harbour
- Matupe River
- Matukar Plantation
- Matukar
- Mattim River
- Mattaserawado River
- Matsunkei
- Matsungan Island
- Matsika
- Matsialavava
- Mat River
- Matoro Creek
- Matop Plantation
- Maton River
- Matong
- Matoko
- Matoff River
- Matoff Bay
- Mato
- Matlik Bay
- Matlik
- Matkumlagir
- Matkomrae
- Matiu Point
- Matiu Number 2
- Matiu Number 1
- Matirogo
- Mati Creek
- Mati
- Mater
- Matepi
- Matenai Island
- Matebinagutu Island
- Matchin Bay
- Matawan
- Matavulu Plantation
- Matausa Number 1
- Matausa
- Matauret Head
- Mataupa
- Matatukuen
- Matatoga River
- Matatai
- Matar Creek
- Matapupu
- Matapau
- Matao-Oruro
- Matanuru
- Matankuk Plantation
- Mataniu
- Matanfadum
- Matandiduk Plantation
- Matandiduk
- Matanatawal Point
- Matanatar Plantation
- Cape Matanatamberan
- Matanatakanamboroi Island
- Cape Matanalem
- Matanalaua River
- Matanalaua Plantation
- Matanakunai Plantation
- Matanakunai Bay
- Matanakunai
- Matamata Mission
- Matamalau Island
- Mataloi
- Matalilu
- Matalik Island
- Mount Matalelok
- Matalau
- Matala Plantation
- Matalaili River
- Matakues
- Matakoka Creek
- Matakaput
- Matakan River
- Matakan Plantation
- Matakan Mission
- Matakan Mission
- Matairuka
- Matailanga
- Matahei
- Matahausa
- Matagu Island
- Matagenta River
- Matafum School
- Matafuma Point
- Matafum
- Matadaragum River
- Mataburu
- Cape Mataba
- Mata
- Masusu
- Masumadobu
- Masumabe
- Masul
- Masubuna Bay
- Masuam
- Massua
- Masso
- Massmass Island
- Massis
- Massey Bakers Junction
- Mas River
- Masokonakanei Rock
- Maso
- Maskikilir
- Masipo
- Masingara
- Masineri
- Masina Range
- Masike
- Masikanapuka Island
- Masigi
- Masianum Hufi
- Masiagana
- Masi
- Masi
- Masele
- Masehi
- Mascot Channel
- Masaweng River
- Masawara
- Masawara
- Masava Island
- Masava Bay
- Masas Island
- Cape Masas
- Masangko
- Masandenai
- Masan
- Masamo
- Masame
- Masalaga
- Cape Masala
- Masahet Island
- Masa
- Marz Hill
- Marwiu Island
- Marwiu Bank
- Marva
- Mount Marutana
- Maruro Reef
- Marupa Mission
- Marunomu
- Marunga
- Marum River
- Marume
- Marum
- Marui
- Maruba River
- Marua Point
- Marua Creek
- Marua
- Maru
- Maru
- Martyrs School
- Martin Luther Seminary
- Ok Mart
- Marshall Bennett Islands
- Marsaula River
- Marrain River
- Maro Reef
- Maropo Creek
- Maron Plantation
- Maron Island
- Mount Marolorna
- Marok
- Marok
- Marob Island
- Mount Marnabe
- Marmar
- Marmar
- Marli
- Markham River
- Markham Point
- Markham Canyon
- Markham Bay
- Marjie Bay
- Mari 3
- Maritsoan Plantation
- Maritambu
- Marisere
- Mariropa River
- Maripepea
- Marinyam
- Maringei
- Marim River
- Marimegu
- Marime
- Marime
- Marimbi
- Marimarita River
- Maril River
- Marilinan
- Mari Lake
- Marila Hill
- Marikimiro Point
- Mariki