Voting in New Zealand was introduced after colonisation by Britain. The first New Zealand Constitution Act was passed in 1852, and the first parliamentary elections were held the following year.

Between 1853 and 1876, elections were held five years apart. In the mid-19th century, provincial council elections attracted more press attention, more candidates and more voters than general elections; the provincial councils were abolished in 1876. Since 1879, elections have typically been held every three years. In times of crisis such as wars or earthquakes, elections have been delayed, and governments have occasionally called early ('snap') elections. Because the New Zealand system of government is relatively centralised, today most electoral and political attention is focused on general elections rather than local elections (which are also held at three-year intervals).

Until 1879 only male property owners could vote in general electorates, which meant that a disproportionate number of electors lived in the countryside. However, Māori electorates were created in 1867, in which all Māori men could vote. Women were enfranchised in 1893, establishing universal suffrage. The introduction of the mixed-member proportional (MMP) system in 1996 provides that all votes contribute to the election result, not just a plurality.

While voter turnout is relatively high by international democratic standards, trends in New Zealand show a general decline since the 1960s, although turnout increased every election between 2011 and 2020.

Early local body elections

The first notable election held in the new colony was the election of the first Wellington Town council pursuant to the Municipal Corporations Act in October 1842. It was open to all "Burgessers". These were undoubtedly male only, though it is not clear whether it was only Europeans who were permitted to vote and what age restrictions applied. There was a one-pound poll tax, rather than a property requirement. This led to accusations of vote buying by those wealthy enough to pay for the registration of indigent electors, however the practice was so prevalent all those candidates who were ultimately successful used the tactic. In contrast to later national elections this local election also saw the emergence of a nascent working class party under the auspices of the Working Men's Association and the Mechanic's Institute.

Voting following the New Zealand Constitution Act 1852 The first national elections in New Zealand took place in 1853, the year after the British government passed the New Zealand Constitution Act 1852. This measure granted limited self-rule to the settlers in New Zealand, who had grown increasingly frustrated with the colonial authorities (and particularly with the nearly unlimited power of the Governor). The Constitution Act established a bicameral parliament, with the lower house (the House of Representatives) to be elected every five years. The upper House (the appointed Legislative Council) was later abolished in 1950.

Initially, the standards for suffrage were relatively high. To vote, a person needed to be:

male, a British subject, aged at least 21 years old, an owner of land worth at least £50, or payer of a certain amount in yearly rental (£10 for farmland or a city house, or £5 for a rural house); and, not be serving a criminal sentence for treason, for a felony, or for another serious offence.

In theory, this would have allowed Māori men to vote, but electoral regulations excluded communally-held land from counting towards the property qualification (quite a common restriction in electoral systems of the time). In these circumstances, many Māori (most of whom lived in accordance with traditional customs of land-ownership) could not vote. Historians debate whether or not the system deliberately excluded Māori in this way. There was concern amongst many settlers that the "uncivilized" Māori would be, if enfranchised, a voting bloc with the numerical strength to outvote Europeans. However, most Māori had little interest in a "settler parliament" that they saw as having little relevance to them.

Despite the exclusion of Māori and of women, New Zealand's voting franchise appeared highly liberal when compared to that of many other countries at the time. At the time of the passing of the Constitution Act, an estimated three-quarters of the adult male European population in New Zealand had the right to vote. This contrasts with the situation in Britain, where the equivalent figure approximated to a fifth of the adult male population.

Supplementary elections

Due to the rapidly expanding settler population, several changes were made to electoral boundaries and supplementary elections were held during the terms of the second, third and fourth parliaments, including those elections that extended the franchise to gold miners and Māori.

Key developments for voting in New Zealand Gold miners and the vote In 1860, 15 additional electorates were created. An electoral redistribution in 1862 took account of the influx of people to Otago because of the Otago gold rush, which began in 1861. In 1862 the franchise was extended to males aged 21 years and over who had held a miner's right continuously for at least three (or six) months. This aimed to enfranchise miners even if they did not own or lease land, as they were nevertheless ranked as "important" economically and socially.

A special multi-member electorate was created in Otago, the Goldfields electorate 1863–70, and then the single-member Goldfields Towns electorate 1866–70. To vote, a miner just presented his miner's licence to the election official, as there were no electoral rolls for these electorates. Outside Otago, where no special goldfields electorate(s) existed, miners could register as electors in the ordinary electoral district where they lived. There were an estimated 6000 holders of miner's licences.

Creation of Māori electorates

1867 saw the establishment of four Māori electorates, enabling Māori to vote without needing to meet the property requirements. Supporters of this change intended the measure as a temporary solution, as a general belief existed that Māori would soon abandon traditional customs governing land ownership. Soon, however, the seats became an electoral fixture. While some have seen the establishment of Māori electorates as an example of progressive legislation, the effect did not always prove as satisfactory as expected. While the seats did increase Māori participation in politics, the relative size of the Māori population of the time vis à vis Pākehā would have warranted approximately 15 seats, not four. Because Māori could vote only in Māori electorates, and the number of Māori electorates remained fixed for over a century, Māori stayed effectively locked into under-representation for decades.

With the introduction of MMP in the 1990s, there were calls to abolish the four Māori electorates as Māori and Pākehā alike would vote in the same party vote, and all parties above 5% would be in Parliament (leading some to argue proportional representation of Māori would be inevitable). However these calls were shot down by Māori leaders and instead the number of seats was increased to better represent the population. In 2002, the number of Māori electorates was increased to seven, where it has stayed ever since.

In recent history, a number of people have continued to call for the abolition of the seats, including Winston Peters, the leader of NZ First party.

Municipal suffrage for women ratepayers In 1867, with the passing of the Municipal Corporations Act, parliamentary members admitted in debates that it contained no provision to prevent women from voting at the local level. Woman suffrage was made optional in the Act, but only Nelson and Otago Provinces allowed it in practice. It was made compulsory in all provinces in 1875. An 1867 editorial in the Nelson Evening Mail explained: "... They are ratepayers, and as such are electors for parochial purposes, and may even serve as guardians, they are also taxpayers, but are neither permitted to vote the supplies nor to elect these who do vote them. Moreover the exclusion of women from Parliamentary rights is an infringement of the primary law of constitutional government that there should be no taxation without representation."

Introduction of the secret ballot Initially, voters informed a polling officer orally of their chosen candidate. The secret ballot, whereby each voter marks their choice on a printed ballot and places the ballot in a sealed box, has been used by European New Zealanders since the and for Māori seats since . The change occurred to reduce the chances of voters feeling intimidated, embarrassed, or pressured about their vote, and to reduce the chances of corruption.

Abolition of the property requirement After considerable controversy, Parliament decided in 1879 to remove the requirement of property ownership. This allowed anyone who met the other qualifications to participate in the electoral process. As the restrictions on suffrage in New Zealand excluded fewer voters than in many other countries, this change did not have the same effect as it would have had in (for example) Britain, but it nevertheless proved significant. In particular, it eventually gave rise to "working class" politicians, and eventually (in 1916) to the Labour Party.

Country quota

Established in 1881, the country quota required rural electorates to be around a third smaller than urban electorates, thus making rural votes more powerful in general elections. The quota was later abolished by the first Labour government in 1945.

Women's suffrage

New Zealand women finally gained the right to vote in national elections with the passage of a bill by the Legislative Council in 1893. The House of Representatives (then the elected lower house) had passed such a bill several times previously, but for the first time in 1893 the appointed Legislative Council did not block it.

The growth of women's suffrage in New Zealand largely resulted from the broad political movement led by Kate Sheppard, the country's most famous suffragette. Inside parliament, politicians such as John Hall, Robert Stout, Julius Vogel, William Fox, and John Ballance supported the movement. When Ballance became Premier in 1891 and established/consolidated the Liberal Party, many believed that female suffrage would ensue imminently, but attempts to pass a suffrage bill repeatedly met with blocks in the Legislative Council, which Ballance's outgoing predecessor, Harry Atkinson, had stacked with conservative politicians.

When Ballance suddenly died in office on 27 April 1893, Richard Seddon replaced him as Premier. Seddon, though a member of Ballance's Liberal Party, opposed women's suffrage, and expected it to be again blocked in the upper house. Despite Seddon's opposition, Members of Parliament assembled sufficient strength in the House of Representatives to pass the bill. When it arrived in the Legislative Council, two previously hostile members, moved to anger at Seddon's "underhand" behaviour in getting one member to change his vote, voted in favour of the bill. Hence the bill was passed by 20 to 18, and with the Royal Assent it was signed into law on 19 September 1893. It is often said by this measure New Zealand became the first country in the world to have granted women's suffrage.

In the 1893 general election women voted for the first time, although they were not eligible to stand as candidates until 1919.

An analysis of men and women on the rolls against the votes recorded showed that in the 92.85% of those on the European rolls voted; men 93.43% and women 92.27%. In the the figures were 90.75% with men 92.02% and women 89.46%. As the Māori electorates did not have electoral rolls they could not be included.New Zealand Official Year-book, 1942 p778

Voting rights extended to seamen