This is a list of legislatures by country. A "legislature" is the generic name for the national parliaments and congresses that act as a plenary general assembly of representatives and that have the power to legislate. All entities included in the list of sovereign states are included in this list.
Names of legislatures
The legislatures are listed with their names in English and the name in the (most-used) native language of the country (or the official name in the second-most used native language in cases where English is the majority "native" language).
List of legislatures
Supranational legislatures
{| class="wikitable sortable sticky-header"
|- bgcolor="#cccccc"
!Organisation
!Name of house(s)
!House level
!Term<br />(years)
!Voting system
!Seats
!Population<br />per seat
!GDP per seat<br />(USD millions)
|-
|
|Andean Parliament
|Unicameral
|
|Direct, indirect (varies by country) proportional
|25
|~
|~
|-
|
|Pan-African Parliament
|Unicameral
|5
|Indirect (appointed by 47 of 53 national legislatures)
|265
|3,974,098
|14,180
|-
|
|Arab Parliament
|Unicameral
|
|Indirect
|80
|~
|~
|-
|
|Benelux Parliament
|Unicameral
|
|Indirect
|49
|~
|~
|-
| Central American Integration System
|Central American Parliament
|Unicameral
|Varies by<br />country
|Direct, proportional
|126
|426,274
|2,651
|-
| Community of Latin American and Caribbean States
|Latin American Parliament
|Unicameral
|5
|Direct
|276
|~
|~
|-
|rowspan=2|
|European Parliament
|Lower
|5
|Open and closed list proportional representation<br />Single transferable vote (in the Republic of Ireland and Malta)
|705
|667,761
|20,983
|-
|Council of the European Union (informally known as the Council of Ministers)
|Upper
|N/A
|Indirect (members of national governments)
|27
|~
|~
|-
|
|Mercosur Parliament
|Unicameral
|5
|Direct, indirect (varies by country) proportional
|108
|1,588,889
|16,228
|}
Legislatures of sovereign states (Member and observer states of the United Nations)
{| class="wikitable sortable sticky-header"
|- bgcolor="#cccccc"
!UN member or observer state
!Overall name of legislature
!Name of house(s)
!House level
!Term (years)
!Electoral system
!data-sort-type="number"|Seats
!Population per seat
|-
|
|colspan="2" align="center" |Leadership Council of Afghanistan (, )
|Unicameral
|No fixed term
|Appointment by the supreme leader
|data-sort-value="30"|30
|