Unicameralism is the practice of having only one legislative or parliamentary chamber. Many countries with unicameral legislatures are often small and homogeneous unitary states and consider an upper house or second chamber unnecessary.


Supporters of unicameralism note the need to control government spending and the elimination of redundant work done by both chambers. Critics of unicameralism point out the double checks and balances that a bicameral system affords, forcing a greater level of consensus on legislative issues. A feature of unicameralism is that urban areas with large populations have more influence than sparsely populated rural ones. In many cases the only way to get sparsely populated regions on board a unified government is to implement a unicameral system (such as the early United States). Supporters say this is an advantage, as they see it provides better apportionment while opponents see giving more power to rural regions as a goal in itself.

Unicameral legislatures were and are also common in Communist (like People's Republic of Poland, People's Republic of China and Cuba) and former Communist states (like Ukraine, Moldova and Serbia), since under Socialist point of view the institution of Senate was seen as conservative, oligarchial, elitist and pro-bourgeoise by nature.

Some of the subnational entities with unicameral legislatures include Nebraska, Guam and the Virgin Islands in the United States, Hong Kong, the Australian states and territories of Queensland, Northern Territory and the Australian Capital Territory, all of the provinces and territories in Canada, all of the German Bundesländer, all of the Italian Regioni.

In the United Kingdom, the devolved Scottish Parliament, National Assembly for Wales and Northern Ireland Assembly are also unicameral.

Virtually all city legislatures are also unicameral in the sense that the city councils are not divided into two chambers. Until the turn of the 20th century, bicameral city councils were common in the United StatesFact|date=February 2007.

In a non-binding referendum held on July 10, 2004, voters in the U.S. territory of Puerto Rico approved changing its Legislative Assembly to a unicameral body by 456,267 votes in favor (83.7%) versus 88,720 against (16.3%). If both the territory's House of Representatives and Senate approve by a 2/3 vote the specific amendments to the Puerto Rico Constitution that are required for the change to a unicameral legislature, another referendum will be held in the territory to approve such amendments. If those constitutional changes are approved, Puerto Rico will switch to a unicameral legislature as early as 2009.



*The Azgayin Zhoghov of Armenia
*The Jatiyo Sangshad of Bangladesh
*The Narodno Sabranie of Bulgaria
*The National People's Congress of the People's Republic of China
*The Legislative Yuan of the Republic of China (Taiwan)
*The Sabor of Croatia
*The National Assembly of People’s Power of Cuba
*The House of Representatives of Cyprus
*The Folketing of Denmark
*The Parlamento Nacional of East Timor
*The Riigikogu of Estonia
*The Eduskunta of Finland
*The Parliament of Gibraltar
*The Vouli ton Ellinon of Greece
*The National Congress of Honduras
*The Althing of Iceland
*The Council of Representatives of Iraq
*The Knesset of Israel
*The Landtag of Liechtenstein
*The Seimas of Lithuania
*The National Assembly of Mauritius
*The Parliament of New Zealand
*The Storting of Norway (may divide into two chambers for some purposes)
*The Congreso de la República of Peru
*The Assembleia da República of Portugal
*The Parliament of Scotland (historic) until 1707
*The Narodna skupština of Serbia
*The National Assembly of Seychelles
*The Parliament of Singapore
*The Gukhoe of South Korea
*The Parliament of Sri Lanka
*The Riksdag of Sweden (since 1971)
*The Büyük Millet Meclisi of Turkey
*The Verhovna Rada of Ukraine
*The Pontifical Commission of Vatican City State
*The Asamblea Nacional of Venezuela


*The Legislative Assembly of the Australian Capital Territory
*All legislatures and legislative councils of the regions and communities of Belgium
*All legislatures of the provinces of Canada
*The Council of Washington, D.C.
*The colonial period of the General Assembly of Georgia
*All Landtage of the states of Germany
*The Legislature of Guam
*The Legislative Council of Hong Kong (divide into two chambers for private members' bills)
*The Legislature of Nebraska
*The Assembly of Northern Ireland
*The Legislative Assembly of the Northern Territory
*The colonial period of the General Assembly of Pennsylvania
*The Parliament of Queensland
*The Parliament of Scotland (present day)
*The Narodna skupština of Republika Srpska
*The Parliaments of the autonomous communities of Spain
*The Legislature of the U.S. Virgin Islands
*The General Assembly of Vermont until 1836
*The National Assembly of Wales

Unicameralist trends within the States of the United States

Within the individual United States, bicameralism was usually modeled upon that of the United States Federal Government, with the upper house, in analogy to the states, consisting of State Senators who represented geographic areas independent of their population, typically counties.

Nebraska is currently the only state with a unicameral legislature. Nebraska's state legislature is also unique in the sense that it is the only state legislature that is entirely nonpartisan.

In 1999, Governor Jesse Ventura [http://news.minnesota.publicradio.org/features/199904/29_kastem_uni/ said] that the Minnesota Legislature should adopt a single unicameral chamber. Though debated, the idea was never adopted.

Local government legislatures of counties, cities, or other political subdivisions within states are usually unicameral and have limited lawmaking powers compared to their state and federal counterparts.

Unicameralist trend in the Philippines

In the Philippines, the process of amending or revising the current constitution and form of government is popularly known as Charter Change. A shift to a unicameral parliament is included in the proposals of the constitutional commission created by President Gloria Macapagal Arroyo. [http://www.concom.ph/proposals/] Unlike in the United States, senators in the Philippine Senate are elected not per district and state but nationally; the Philippines is a unitary state. [http://www.gov.ph/aboutphil/a6.asp] The Philippine government's decision making process, relative to the United States, is more rigid, highly centralized, much slower and susceptible to political "gridlocks." As a result, the trend for unicameralism as well as other political system reforms are more contentious in the Philippines. [http://www.concom.ph/news/oct192005whychange.php]

ee also

* Multicameralism
* Bicameralism
* Tricameralism
* Tetracameralism
* List of national legislatures

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