Borough of Onslow

The Borough of Onslow was a local government district immediately to the north of Wellington, New Zealand. Incorporated on 13 March 1890 it included the districts of: Wadestown, Crofton, Khandallah and Kaiwarra but not Johnsonville. It replaced the Kaiwarra Town Board, the Wellington District Roads Board and a small part of the very wide jurisdiction of the Hutt County Council. Johnsonville Town Board remained independent.

Most of the population, in Wadestown, amalgamated with Wellington City in 1907, the rest in 1919.

The Kaiwarra toll gate, then within the jurisdiction of Hutt County Council, imposed a tax on all traffic entering Wellington. The gate was on part of the proposed new borough's district and if the proposal was approved there could be no more tolls collected there by Hutt County. This was a major incentive in the formation of the new borough. Hutt County did erect new toll gates in the Ngauranga Gorge and on the Hutt Road but these placements did not affect local Onslow and Wellington traffic to the same extent. The new council rented out the old toll-collector's house.

Onslow Brass Band formed 1905 changed its name to Wellington Brass Band in 1998.

Onslow College opened in 1956 to provide a secondary school for the district.

Onslow Cricket Club

Parish of Onslow

Onslow Road remains the principal access to Khandallah from the harbourside.

The Earl of Onslow was Governor of New Zealand at the time. His name came from a township in the parish of Shrewsbury St. Chad, Shropshire.

The difficulties of building adequate drainage for Wadestown within Onslow's boundaries, the subdivision of the Highland Park estate and the appeal to the residents of this very steep area of joining Wellington's tramway system led to Wadestown's amalgamation with Wellington City in April 1907.

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