The Plurinational Legislative Assembly () is the national legislature of Bolivia, placed in La Paz, the country's seat of government.
The assembly is bicameral, consisting of a lower house (the Chamber of Deputies or ) and an upper house (the Chamber of Senators, or Cámara de Senadores). The Vice President of Bolivia also serves as the ex officio President of the Plurinational Legislative Assembly. Each house elects its own directorate: a President, first and second Vice Presidents, and three or four Secretaries (for the Senate and the Chamber of Deputies, respectively). Each party is said to have a seat () consisting of its legislators. The representatives of each department comprise a brigade (brigada). Each house considers legislation in standing committees.
The Chamber of Senators has 36 seats. Each of the country's nine departments returns four senators elected by proportional representation (using the D'Hondt method). (From 1985 to 2009, the Senate had 27 seats: three seats per department: two from the party or formula that receives the most votes, with the third senator representing the second-placed party.) Senators are elected from party lists to serve five-year terms, and the minimum age to hold a Senate seat is 35 years.
The Chamber of Deputies comprises 130 seats, elected using a seat linkage based mixed compensatory system (for mixed-member proportional representation): 70 deputies are elected to represent single-member electoral districts, 7 of which are Indigenous or Campesino seats elected by the usos y costumbres of minority groups, 60 are elected from party lists on a departmental basis.