The electorate of Karori was created for the 1946 elections.

The electorate was first created for the 1902 election.

The first electorate of Ashburton was created for the 1881 elections.

A third electorate named Ashburton was created for the 1978 elections.

The electorate was created in 1896, and abolished in 1928.

The electorate was created in 1853, and existed until 1890.

The electorate of Masterton was created for the 1887 general election.

The electorate of Ashley was created for the 1866 elections.

In 1972, the additional electorate of Hamilton East was created.

The electorate was first created for the 1881 general election, held on 9 December.