Wanganui and Rangitikei is a former parliamentary electorate that existed from 1853 to 1860. It was represented by two Members of Parliament.
The New Zealand Constitution Act 1852, passed by the British government, allowed New Zealand to establish a representative government. The initial 24 New Zealand electorates were defined by Governor George Grey in March 1853. Wanganui and Rangitikei was one of the initial single-member electorates. The electorate comprised two areas fronting onto the South Taranaki Bight: the area around the town of Wanganui, and a larger area further east stretching further inland along the Rangitikei River.
The Constitution Act also allowed the House of Representatives to establish new electorates and make changes to existing electorates, and this was first done through 'The Electoral Districts Act, 1858'. At that time, four new electorates were formed by splitting existing electorates, and the previously unincorporated land in the North Island was assigned to various electorates. The Wanganui and Rangitikei electorate gained a large area and for the first time, had boundaries with other electorates: Omata and Grey and Bell in the west, Southern Division along the 39th latitude in the north, County of Hawke in the east, and Wellington Country in the south.
In the 1860 electoral redistribution, the House of Representatives increased the number of representatives by 12, reflecting the immense population growth since the original electorates were established in 1853. The redistribution created 15 additional electorates with between one and three members, and Wanganui and Rangitikei was split into two separate electorates: the Rangitikei electorate and the Wanganui electorate.