M
- Macaulay River
- Macfarlane River
- Mackenzie River
- Maclennan River
- Maerewhenua River
- Mahakirau River
- Mahitahi River
- Mahurangi River
- Maitai River
- Makahu River
- Makakahi River
- Makara River (2)
- Makarau River
- Makaretu River
- Makarewa River
- Makarora River
- Makaroro River
- Makatote River
- Makerikeri River
- Makikihi River
- Makino River
- Makotuku River
- Makuri River
- Manaia River
- Manakaiaua River
- Manawapou River
- Manawatu River
- Mandamus River
- Mangaaruhe River
- Mangahao River
- Mangahauini River
- Mangaheia River
- Mangakahia River
- Mangakarengorengo River
- Mangakuri River
- Mangamaire River
- Mangamuka River
- Manganui o te Ao River
- Manganui River (Northland)
- Manganui River (Taranaki)
- Manganui River (Waikato)
- Manganuiohou River
- Mangaone River (2)
- Mangaoparo River
- Mangaorino River
- Mangaotaki River
- Mangapa River
- Mangapai River
- Mangapapa River (2)
- Mangapehi River
- Mangapoike River
- Mangapu River
- Mangaroa River
- Mangatainoka River
- Mangatawhiri River
- Mangatera River
- Mangatete River
- Mangatewai River
- Mangatewainui River
- Mangatokerau River
- Mangatoro River
- Mangatu River
- Mangaturuturu River
- Mangawai River
- Mangawharariki River
- Mangawhero River
- Mangere River
- Mangles River
- Mangonuiowae River
- Mangorewa River
- Manuherikia River
- Maori River
- Maraehara River
- Maraekakaho River
- Maraetaha River
- Maraetotara River
- Marahau River
- Maramarua River
- Maramataha River
- Mararoa River
- Marchburn River
- Marokopa River
- Maropea River
- Martyr River
- Maruia River
- Mason River
- Mata River
- Matahaka River
- Mataikona River
- Matakana River
- Matakitaki River
- Matakohe River
- Mataroa River
- Mataura River
- Mathias River
- Matiri River
- Matukituki River
- Maungakotukutuku Stream
- Little Grey River
- McRae River
- Meola creek
- Medina River
- Medway River
- Mike River
- Mikonui River
- Mimi River
- Miner River
- Mingha River
- Mistake River
- Misty River
- Moawhango River
- Moawhango West River
- Moeangiangi River
- Moeraki River
- Mohaka River
- Mohakatino River
- Mokau River
- Mokihinui River
- Mokomokonui River
- Mokoreta River
- Monowai River
- Montgomerie River
- Morgan River
- Morse River
- Motatapu River
- Motu River
- Motueka River
- Motukaika River
- Motunau River
- Motupiko River
- Motupipi River
- Motuti River
- Moutere River
- Mowbray River
- Mueller River
- Mungo River
- Murchison River
- Murray River
Read more about this topic: List Of Rivers Of New Zealand