A
- Aan River
- Acheron River (Marlborough)
- Acheron River (Canterbury)
- Ada River
- Adams River
- Ahaura River
- Ahuriri River
- Ahuroa River
- Akatarawa River
- Akitio River
- Alexander River
- Alfred River
- Allen River
- Alma River
- Alph River (Ross Dependency)
- Anatoki River
- Anatori River
- Anaweka River
- Anne River
- Anti Crow River
- Aongatete River
- Aorangiwai River
- Aorere River
- Aparima River
- Arahura River
- Arapaoa River
- Araparera River
- Arawhata River
- Arnold River
- Arnst River
- Aropaoanui River
- Arrow River
- Arthur River
- Ashburton River / Hakatere
- Ashley River / Rakahuri
- Avoca River (Canterbury)
- Avoca River (Hawke's Bay)
- Avon River (Canterbury)
- Avon River (Marlborough)
- Awakari River
- Awakino River
- Awanui River
- Awarau River
- Awaroa River
- Awarua River (Northland)
- Awarua River (Southland)
- Awatere River
- Awatere River (Gisborne)
- Awhea River
Read more about this topic: List Of Rivers Of New Zealand