The longest rivers in New Zealand are:
- Waikato River (North Island) – 425 km
- Clutha River or Matau River (South Island) – 322 km
- Whanganui River (North Island) – 290 km
- Taieri River (South Island) – 288 km
- Rangitikei River (North Island) – 241 km
- Mataura River (South Island) – 240 km
- Waiau River, Southland (South Island) – 217 km
- Clarence River (South Island) – 209 km
- Waitaki River (South Island) – 209 km
- Oreti River (South Island) – 203 km