Iceland is often described as one of the world’s established parliamentary democracies, but its voting system has several features that make it different from the electoral systems used in countries such as the United States or the United Kingdom. Icelanders vote in parliamentary elections, presidential elections and, when a referendum is held, directly on specific national questions.

The country’s Parliament, the Alþingi, has 63 seats. Members of Parliament are elected for four-year terms through a proportional representation system, while the president is elected separately by voters. The distinction is important because Icelanders do not directly elect a prime minister. Instead, the prime minister emerges from the parliamentary system after an election.

How Iceland’s parliamentary elections work

The Alþingi is Iceland’s unicameral parliament, meaning that unlike countries with two legislative chambers, Iceland has only one national parliamentary chamber.

All 63 parliamentary seats are filled through elections based on proportional representation. Iceland is divided into six multi-member constituencies, and voters cast ballots for political parties and their candidate lists. The system is designed to ensure that the composition of Parliament broadly reflects the distribution of votes among political parties.

This is fundamentally different from a winner-takes-all electoral system. In a first-past-the-post system, a candidate or party can win a constituency with more votes than its competitors and take the seat even without receiving a majority of all votes. Iceland’s proportional system instead allows parties that receive substantial support across the country to gain parliamentary representation.

The six constituencies are important because some parliamentary seats are allocated directly within the constituencies, while additional equalisation or compensatory seats are used to make the overall distribution of parliamentary seats more proportional to parties’ national support. Nine of the 63 seats are compensatory seats.

What are equalisation seats?

Equalisation seats are one of the most interesting features of Iceland’s electoral system.

Imagine that a political party receives a significant percentage of the national vote but performs unevenly across the country’s constituencies. It might win fewer constituency seats than its overall vote share would suggest.

The equalisation seats are intended to correct some of that imbalance.

Iceland has 54 constituency seats and nine compensatory seats. The compensatory seats are distributed in a way intended to bring each party’s overall parliamentary representation closer to its share of the national vote. A party generally needs at least 5 percent of the national vote to qualify for these compensatory seats.

This mechanism is particularly important because it combines local representation with national proportionality. Voters therefore have representation from their own geographical constituency while the system also attempts to prevent substantial distortions between votes received and seats won.

The Alþingi explains that constituency seat allocations can also be adjusted when major differences emerge in the number of registered voters represented by each seat. The law requires the electoral authorities to reduce such disparities while maintaining a minimum of six seats for each constituency.

Do Icelanders vote directly for the prime minister?

No.

This is one of the most important things to understand about Icelandic politics.

When Icelanders vote in parliamentary elections, they are electing members of the Alþingi rather than directly choosing a prime minister.

After the election, political parties negotiate to establish a government capable of securing parliamentary support. The president formally appoints the prime minister, who then leads the government.

Because proportional representation frequently produces parliaments containing several parties, coalition governments are common. A party can win the largest number of seats without having enough seats to govern alone.

This means that negotiations between political parties after an election can be just as important as the election results themselves.

The system encourages parties to find areas of common ground and negotiate governing agreements rather than assuming that the largest party automatically controls the government.

How is the president elected?

Iceland’s president is chosen separately from Parliament.

The president is directly elected by Icelandic voters for a four-year term. The election uses a plurality system, meaning that the candidate who receives the most votes wins. There is no requirement for a candidate to obtain more than 50 percent of the vote.

This makes the presidential election considerably different from the parliamentary election.

For example, in the 2024 presidential election, Halla Tómasdóttir won 33.94 percent of the vote, finishing ahead of Katrín Jakobsdóttir, who received 25.03 percent. Because Halla received more votes than any other candidate, she was elected president even though she did not receive an absolute majority.

The Icelandic presidency is generally less politically powerful than the presidency in systems such as the United States. Iceland is fundamentally a parliamentary system, and executive government is centered on the prime minister and cabinet.

Iceland’s president can still have an important constitutional role

Although the president does not normally run the government, the office has constitutional responsibilities.

The president formally appoints the prime minister and has other constitutional powers. One particularly important power concerns legislation passed by Parliament.

Under Iceland’s constitutional arrangements, the president can refuse to sign a bill into law, after which the legislation is put to a national referendum.

This means the presidency is not simply ceremonial, even though day-to-day political leadership rests primarily with the government and Parliament.

The separation between the directly elected president and the parliamentary government is therefore an important feature of Iceland’s political system.

What happens in an Icelandic referendum?

Referendums are different from parliamentary or presidential elections because voters are deciding a specific question rather than choosing candidates or political parties.

In a referendum, voters normally select between clearly defined alternatives presented on the ballot.

A recent example occurred on August 29, 2026, when Iceland held a national referendum asking whether the country should resume accession negotiations with the European Union. The ballot offered voters a straightforward “Yes” or “No” choice.

This illustrates how direct democracy can operate alongside representative democracy.

Most political decisions in Iceland are made through elected representatives in the Alþingi. A referendum, however, gives voters an opportunity to decide directly on a particular national question when such a vote is called.

Who can vote in Iceland?

Voting eligibility depends on the type of election.

For national parliamentary elections, Icelandic citizenship and the applicable legal voting requirements are important. Voter registration is handled through official electoral records rather than requiring citizens to individually register in the manner used in some countries.

The electoral roll is therefore an important part of the election process. For the 2024 parliamentary election, Iceland had approximately 266,741 registered voters, according to the IFES Election Guide. Turnout was about 80.68 percent, demonstrating the traditionally high level of participation in Icelandic national elections.

High participation is one of the characteristics frequently associated with Icelandic democracy, although turnout can vary significantly depending on the type of election.

Why proportional representation matters in Iceland

Proportional representation has a major influence on Icelandic political life.

Because parliamentary seats broadly correspond to parties’ levels of electoral support, smaller parties have a greater opportunity to gain representation than they would under a strict winner-takes-all system.

This has helped Iceland develop a multiparty political environment.

However, proportional representation also means that one party does not necessarily obtain enough seats to govern independently. Coalition building is therefore an important part of Icelandic politics.

After an election, political parties may spend considerable time negotiating over economic policy, taxation, healthcare, education, energy, fisheries, foreign affairs and other issues before forming a government.

In this respect, the election does not necessarily produce a government immediately. It produces a Parliament, and the parliamentary balance then determines which political combination can form a government.

What does a ballot look like?

An Icelandic parliamentary ballot allows voters to choose among political parties and their candidate lists.

The system also provides mechanisms through which voters can influence the order of candidates on a party list under the applicable electoral rules. This gives the system a greater degree of voter influence than a simple vote for a party with no candidate preference.

The precise ballot arrangements and candidate-list rules are established under Icelandic electoral law and can vary according to the election.

For voters, however, the basic principle is relatively straightforward: they participate in choosing representatives who will take seats in the Alþingi.

Parliamentary elections versus presidential elections

The difference between Iceland’s two principal national elections can be summarized simply.

Parliamentary election: voters elect 63 members of the Alþingi through proportional representation. The parliamentary balance determines which party or coalition can form the government.

Presidential election: voters directly choose the president. The candidate receiving the most votes wins the four-year term.

Referendum: voters directly answer a specific national question when a referendum is held.

These three mechanisms mean Iceland combines representative democracy with direct election of its head of state and occasional direct decision-making through referendums.

Why Iceland’s voting system encourages coalition politics

One consequence of proportional representation is that Iceland’s political parties have strong incentives to cooperate.

A party can perform well at an election but still need another party, or several parties, to reach a parliamentary majority.

Coalition negotiations can therefore become a crucial part of the political process.

This can have advantages. Parties are often required to compromise, and governments may need to accommodate different political perspectives.

There can also be disadvantages. Coalition negotiations can be complicated, and disagreements between coalition partners can lead to political instability or early elections.

Nevertheless, coalition government has become a familiar feature of Icelandic parliamentary politics.

The role of political parties

Political parties are central to Iceland’s electoral system.

Rather than being dominated by a simple two-party contest, Iceland has historically had several parties capable of winning parliamentary seats.

The proportional system allows political movements with significant but geographically dispersed support to compete for representation.

This means Icelandic voters can choose among parties with different approaches to economic policy, social welfare, environmental issues, taxation, European integration, fisheries, immigration and other national questions.

The result is a political landscape in which coalition-building and negotiation are often essential.

Is Iceland’s voting system democratic?

Iceland’s electoral system is generally regarded as a democratic proportional-representation system, and the country has a long-established tradition of competitive elections and peaceful transfers of political power.

The system is designed around several principles: direct voting, proportional parliamentary representation, geographical constituencies, compensation for disproportional results and direct election of the president.

No electoral system is perfect, however.

One continuing challenge is balancing geographical representation with the principle of equal voting power. Iceland’s constitution and electoral arrangements contain mechanisms intended to reduce major differences in the number of voters represented by individual parliamentary seats.

Another issue is the role of the 5 percent threshold for compensatory seats. The threshold can help prevent excessive fragmentation while also making it more difficult for very small parties to benefit from the equalisation mechanism.

Why Iceland’s system is important

Iceland’s voting system reflects the country’s broader political tradition: a relatively small population, strong parliamentary institutions, a multiparty environment and a political culture in which negotiation plays a major role.

The system does not simply ask which candidate received the most votes in a district. Instead, it attempts to translate votes into parliamentary representation while maintaining a geographical connection between voters and their elected representatives.

The result is a system in which voters choose Parliament, Parliament determines the balance of political power, parties negotiate to form governments, and the president is elected separately by the public.

That structure helps explain why Icelandic elections can produce outcomes that look very different from elections in countries using first-past-the-post systems.

Conclusion

Understanding Iceland’s voting system requires looking beyond the simple act of casting a ballot.

Iceland uses proportional representation for its 63-member Alþingi, with six constituencies and nine compensatory seats designed to improve proportionality between votes and parliamentary representation. The president is separately elected directly by voters, while the prime minister emerges from the parliamentary system rather than being directly elected.

Referendums provide another mechanism through which Icelanders can participate directly in important national decisions.

Together, these arrangements create a distinctive democratic system in which representation, proportionality, coalition-building and direct public participation all play important roles.

For anyone trying to understand Icelandic politics, the most important point is simple: an Icelandic parliamentary election is not primarily about choosing a prime minister. It is about choosing the composition of the Alþingi — and that composition ultimately determines who can form and lead the government.