Whanganui

Whanganui
Nickname: 
The River City
Motto: 
Sans Dieu Rien,
English: Without God Nothing
Whanganui
Coordinates: 39°55′57″S 175°03′07″E / 39.93250°S 175.05194°E / -39.93250; 175.05194
CountryNew Zealand
RegionManawatū-Whanganui
Territorial authorityWhanganui District Council
Government
 • MayorAndrew Tripe
 • Deputy MayorMichael Law
Area
 • Territorial
2,373.26 km2 (916.32 sq mi)
 • Urban
41.05 km2 (15.85 sq mi)
Population
 (June 2025)
 • Territorial
49,200
 • Density20.7/km2 (53.7/sq mi)
 • Urban
42,800
 • Urban density1,040/km2 (2,700/sq mi)
Postcode(s)
4500, 4501
Area code06
WebsiteWhanganui.govt.nz

Whanganui, also spelt Wanganui, is a city in the Manawatū-Whanganui region of New Zealand. The city is located on the west coast of the North Island at the mouth of the Whanganui River, New Zealand's longest navigable waterway. Whanganui is the 19th most-populous urban area in New Zealand and the second-most-populous in Manawatū-Whanganui, with a population of 42,800 as of June 2025.

Whanganui is the ancestral home of Te Āti Haunui-a-Pāpārangi and other Whanganui Māori tribes. The New Zealand Company began to settle the area in 1840, establishing its second settlement after Wellington. In the early years, most European settlers came via Wellington. Whanganui greatly expanded in the 1870s, and freezing works, woollen mills, phosphate works and wool stores were established in the town. Today, much of Whanganui's economy relates directly to the fertile and prosperous farming hinterland.

Like several New Zealand urban areas, it was officially designated a city until an administrative reorganisation in 1989, and is now run by Whanganui District Council. In 2021 it was added to the Design Cities (UNESCO), becoming the only city of design to be located in New Zealand.