|Legislatures by country|
A legislature is a deliberative assembly with the authority to make laws for a political entity such as a country or city. Legislatures form important parts of most governments; in the separation of powers model, they are often contrasted with the executive and judicial branches of government.
Legislatures are made up of individual members, known as legislators, who vote on proposed laws. A legislature usually contains a fixed number of legislators; because legislatures usually meet in a specific room filled with seats for the legislators, this is often described as the number of "seats" it contains. For example, a legislature that has 100 "seats" has 100 members. By extension, an electoral district that elects a single legislature can also be described as a "seat", as, for, example, in the phrases "safe seat" and "marginal seat".
In parliamentary systems of government, the executive is responsible to the legislature which may remove it with a vote of no confidence. According to the separation of powers doctrine, the legislature in a presidential system is considered an independent and coequal branch of government along with both the judiciary and the executive.
A legislature may debate and vote upon bills as a single unit, or it may be composed of multiple separate assemblies, called by various names including legislative chambers, debate chambers, and houses, which debate and vote separately and have distinct powers. A legislature which operates as a single unit is unicameral, one divided into two chambers is bicameral, and one divided into three chambers is tricameral.
In bicameral legislatures, one chamber is usually considered the upper house, which the other is considered the lower house. The two types are not rigidly different, but members of upper houses tend to be indirectly elected or appointed rather than directly elected, tend to be allocated by administrative divisions rather than by population, and tend to to have longer terms than members of the lower house. In some systems, particularly parliamentary systems, the upper house has less power and tends to have a more advisory role, but in others, particularly presidential systems, the upper house has equal or even greater power.
In federations, the upper house typically represents the federation's component states. This is a case with the supranational legislature of the European Union. The upper house may either contain the delegates of state governments – as in the European Union and in Germany and, before 1913, in the United States – or be elected according to a formula that grants equal representation to states with smaller populations, as is the case in Australia and the United States since 1913.
Tricameral legislatures are rare; the Massachusetts Governor's Council still exists, but the most recent national example existed in the waning years of Caucasian-minority rule in South Africa. Tetracameral legislatures no longer exist, but they were previously used in Scandinavia.
Legislatures vary widely in their size. Among national legislatures, China's National People's Congress is the largest with 2 987 members, while Vatican City's Pontifical Commission is the smallest with 7. Neither legislature is democratically elected, and the National People's Congress has little independent power.
Legislative size is a tradeoff between efficiency and representation; the smaller the legislature, the more efficiently it can operate, but the larger the legislature, the better it can represent the political diversity of its constituents. Comparative analysis of national legislatures has found that size of a country's lower house tends to correspond to the cube root of its population; that is, the size of the lower house tends to increase along with population, but much more slowly.
Some legislatures are known simply as the Legislature, including:
|Liberia||Legislature of Liberia||Bicameral|
|Marshall Islands||Legislature of the Marshall Islands||Unicameral|
|South Sudan||National Legislature||Bicameral|
|India||Jammu and Kashmir||Jammu and Kashmir Legislature||Bicameral|
|India||Tamil Nadu||Tamil Nadu Legislature||Unicameral|
|India||Uttar Pradesh||Uttar Pradesh Legislature||Bicameral|
|South Africa||Eastern Cape||Eastern Cape Provincial Legislature||Unicameral|
|South Africa||Free State||Free State Legislature||Unicameral|
|South Africa||Gauteng||Gauteng Provincial Legislature||Unicameral|
|South Africa||KwaZulu-Natal||KwaZulu-Natal Legislature||Unicameral|
|South Africa||Limpopo||Limpopo Legislature||Unicameral|
|South Africa||Mpumalanga||Mpumalanga Provincial Legislature||Unicameral|
|South Africa||North West||North West Provincial Legislature||Unicameral|
|South Africa||Northern Cape||Northern Cape Provincial Legislature||Unicameral|
|United States||Alabama||Alabama Legislature||Bicameral|
|United States||Alaska||Alaska Legislature||Bicameral|
|United States||Arizona||Arizona State Legislature||Bicameral|
|United States||California||California State Legislature||Bicameral|
|United States||Florida||Florida Legislature||Bicameral|
|United States||Hawaii||Hawaii State Legislature||Bicameral|
|United States||Idaho||Idaho Legislature||Bicameral|
|United States||Kansas||Kansas Legislature||Bicameral|
|United States||Louisiana||Louisiana State Legislature||Bicameral|
|United States||Maine||Maine Legislature||Bicameral|
|United States||Michigan||Michigan Legislature||Bicameral|
|United States||Minnesota||Minnesota Legislature||Bicameral|
|United States||Mississippi||Mississippi Legislature||Bicameral|
|United States||Montana||Montana Legislature||Bicameral|
|United States||Nebraska||Nebraska Legislature||Unicameral|
|United States||Nevada||Nevada Legislature||Bicameral|
|United States||New Jersey||New Jersey Legislature||Bicameral|
|United States||New Mexico||New Mexico Legislature||Bicameral|
|United States||New York||New York State Legislature||Bicameral|
|United States||Oklahoma||Oklahoma Legislature||Bicameral|
|United States||South Dakota||South Dakota Legislature||Bicameral|
|United States||Texas||Texas Legislature||Bicameral|
|United States||Utah||Utah State Legislature||Bicameral|
|United States||Washington||Washington State Legislature||Bicameral|
|United States||West Virginia||West Virginia Legislature||Bicameral|
|United States||Wisconsin||Wisconsin Legislature||Bicameral|
|United States||Wyoming||Wyoming Legislature||Bicameral|
|United States||Guam||Legislature of Guam||Unicameral|
|United States||Northern Mariana Islands||Northern Mariana Islands Commonwealth Legislature||Bicameral|
|United States||U.S. Virgin Islands||Legislature of the Virgin Islands||Unicameral|
|Kingdom of Hawaii||Legislature of the Kingdom of Hawaii||Bicameral/unicameral|
|Nepal||Interim legislature of Nepal||Unicameral|