The Waitaki electorate has existed four times: in
1871 to
1946; in
1957 to
1969; in
1978 to
1996 and lastly since . The first election in the electorate was contested by
William Steward and Macassey in , with Steward being successful. The next election was held in early January 1876. Waitaki had become a two-member electorate, and four candidates put their names forward. Steward and Joseph O'Meagher contested the election as abolitionists (i.e. they were in favour of abolishing the
provincial government), while
Thomas William Hislop and
Samuel Shrimski were provincialists (i.e. they favoured the retention of provincial government). The provincialists won the election by quite some margin. Hislop and Shrimski were both confirmed in the , but Hislop resigned on 28 April 1880 "for private reasons". The resulting was won by
George Jones. From 1881 onwards, the electorate became a single-member constituency again.
Thomas Young Duncan won the and the two subsequent elections. In the , Duncan was opposed by John Reid, but defeated him by 705 to 676 votes. In the , Duncan successfully contested the
Oamaru electorate instead, with
John McKenzie taking Waitaki. McKenzie had previously held
Waihemo and went back to that electorate again for the . William Steward, who was the first representative of the electorate, had since 1881 represented
Waimate. He returned to Waitaki for the 1893 election, was successful and also won the five subsequent elections. He held the electorate until 1911. He was appointed to the
Legislative Council in the following year, but died within months of the appointment.
Francis Henry Smith succeeded Steward in the . At the next election in , Smith stood unsuccessfully in the
Timaru electorate. The Waitaki electorate was won by
John Anstey that year. At the , Anstey was defeated by
John Bitchener, who held Waitaki until he was defeated in the by
David Barnes. Barnes, in turn, held the electorate for one parliamentary term and was defeated in the by
David Campbell Kidd. At the final count, Kidd had a majority of 10 votes, and Barnes applied for a magisterial recount; this increased the 1938 result to a majority of 14 votes. Kidd represented Waitaki until 1946, when the electorate was abolished and he successfully stood in
Waimate instead. Waitaki was re-established for the and was won by
Thomas Hayman, who had previously represented
Oamaru. Hayman died in office on 2 January 1962 and was succeeded by
Allan Dick, who won the
1962 by-election. Dick held the electorate until 1969, when it was abolished again. The electorate was re-established for the
1978 general election.
Jonathan Elworthy of the
National Party was the successful candidate. Elworthy was re-elected in the
1981 general election, but defeated in the
1984 general election by
Labour's
Jim Sutton. Sutton was re-elected in the
1987 general election, but lost to National's
Alec Neill in the
1990 general election. Neill was re-elected in the
1993 general election. At the end of the next term, in 1996, the electorate was abolished again. Neill failed to be selected by the National Party as a candidate for any of the electorates for the
1996 general election. With the advent of
Mixed-member proportional representation (MMP) voting system in 1996 and the resulting reduction in the number of constituencies, the electorate was split in half; the town of
Oamaru was pulled into the resized
Otago electorate and the balance was transferred into the new
Aoraki electorate. The Waitaki electorate was re-established for the , and
Jacqui Dean, incumbent since the in the electorate won the election with a large majority against Labour's
David Parker. Dean increased her majority in the against Labour's Barry Monks. Dean was confirmed as the electorate's representative in the . ==Members of Parliament==