Henry Shafto Harrison was the first representative. His 7 February
1861 election was declared invalid. He stood again in the and was elected again. He then served the electorate until the end of the term in 1866. Harrison,
John Bryce and John Garner contested the . The nomination meeting was held on Friday, 2 March 1866. Harrison, Bryce and Garner received 51, 102 and 7 votes, respectively, at the election on the following day. Bryce was thus declared elected. Bryce resigned in 1867. The resulting 6 May was won by Harrison, and he served until the dissolution of Parliament on 30 December 1870. Bryce was again elected in the 30 January . This time, he served three parliamentary terms until the dissolution in November 1881. Wanganui became a two-member electorate for the 12 January
1876 election. Apart from Bryce,
Julius Vogel was elected, who was later to become Premier. Vogel resigned on 9 September 1876. The resulting 2 October was won by William Fox, resulting in his second period of representation of a Whanganui-centred electorate. He served until the end of the term on 15 August 1879. Bryce and
John Ballance won the . They both served until the end of the term, with Parliament being dissolved on 8 November 1881. For the , the electorate reverted to being represented by a single member. The election, held on 9 December, was won by
William Hogg Watt. He served until the end of the term, with Parliament being dissolved on 27 June 1884. The was once again won by John Ballance. This time, he would serve in three successive Parliaments. He died in office on 27 April 1893 during the
11th Parliament. Ballance formed the
Liberal Party after the and became its leader, and thus introduced party politics to New Zealand. The
Liberal Government of New Zealand would last for 21 years and is the longest serving government in New Zealand's history. Ballance's death triggered the , which was held on 13 June and won by
Archibald Willis, who was re-elected at the a few months later.
Gilbert Carson was successful in the . He served one term. He was succeeded by Willis in the , who served two more terms for the electorate.
James Thomas Hogan won the . He served two terms and was defeated in the by
Bill Veitch. Veitch had a long career in the electorate, serving until 1935, when he defeated. He was initially an
Independent, but joined the
Liberal Party in 1925, and changed to the
United Party in 1928.
Joe Cotterill won the electorate in the for the
Labour Party. He also had a long career, retiring in 1960 from the Wanganui seat. He was succeeded by his party colleague
George Spooner in the , who served three terms and was defeated in by
Bill Tolhurst from the
National Party. Tolhurst served one term and at the , the electorate returned to Labour.
Russell Marshall served six terms and retired in 1990. In the ,
Cam Campion secured the seat for National. He retired in 1993 and died two years after that. The seat returned to Labour again, with
Jill Pettis winning the . She was the first woman to represent Wanganui. She served four terms, until her defeat in the by
Chester Borrows of the National Party. Pettis served an additional term as a
List MP until 2008. Borrows announced in 2016 that he would not seek reelection at the
2017 general election and the seat was won by Harete Hipango, retaining it for the National Party. She however, was defeated after one term by Labour's
Steph Lewis. Several members (Fox, Vogel and Ballance) became Premier.
Terry Heffernan stood in the electorate five times for four parties, from to .
Members of Parliament Unless otherwise stated, all MPs terms began and ended at a general election.
Key single-member electorate multi-member electorate single-member electorate List MPs Members of Parliament elected from party lists in elections where that person also unsuccessfully contested the electorate. Unless otherwise stated, all MPs terms began and ended at general elections. ==Election results==