Trentham, New Zealand

Trentham
View looking northeast from Silverstream, with Trentham Racecourse in the centre and Trentham Army Camp at right
Coordinates: 41°08′S 175°02′E / 41.13°S 175.04°E / -41.13; 175.04
CountryNew Zealand
RegionWellington Region
Territorial authorityUpper Hutt
Electorates
Government
  Territorial AuthorityUpper Hutt City Council
  Regional councilGreater Wellington Regional Council
  Mayor of Upper HuttWayne Guppy
  Remutaka MPChris Hipkins
  Ikaroa-Rāwhiti MPCushla Tangaere-Manuel
Area
  Total
11.37 km2 (4.39 sq mi)
Population
 (June 2024)
  Total
11,960
  Density1,100/km2 (2,700/sq mi)

Trentham (/ˈtrɛnθəm/) is the most populous suburb of Upper Hutt, a city in the Wellington region of New Zealand. The suburb is located in a widening of the Hutt Valley, five kilometres to the southwest of the Upper Hutt city centre.

The suburb includes the Trentham Racecourse, the base of the Wellington Racing Club, the site of Hutt International Boys' School, and the Trentham Railway Station.

The Trentham Military Camp was used extensively for training soldiers in preparation for World War I and World War II. It is still a base for the New Zealand Defence Force.

A General Motors-Holden assembly plant operated in Trentham between 1967 and 1990.