Electoral system family

Ministry of Education (Ministerio de Educación), Political Constitution of the State (Constitución Política del Estado), last amended 2009, accessed 25 August 2025

Article 146.

I. The Chamber of Deputies shall be composed of 130 members.

II. In each department, half of the deputies are elected in single-member constituencies. The other half are elected in departmental multi-member constituencies from lists headed by the candidates for President, Vice President, and Senator of the Republic.

III. Deputies are elected by universal, direct, and secret ballot. In single-member constituencies, they are elected by simple majority vote. In multi-member constituencies, they are elected by the system of representation established by law.

IV. The number of deputies must reflect the proportional vote obtained by each party, citizen group, or indigenous community.

V. The distribution of the total number of seats among the departments will be determined by the Electoral Body based on the number of inhabitants of each department, according to the latest National Census, in accordance with the Law. For equity, the law will assign a minimum number of seats to departments with the lowest population and lowest level of economic development. If the distribution of seats for any department is uneven, preference will be given to the allocation of single-member seats.

VI. Single-member constituencies must have geographic continuity, affinity, and territorial continuity, not transcend the boundaries of each department, and be based on population and territorial extension criteria. The Electoral Body will delimit the single-member constituencies.

VII. Special Indigenous and Native Peasant Constituencies will be governed by the principle of population density in each department. They must not transcend departmental boundaries. They will be established only in rural areas and in those departments where these Indigenous and Native Peasant Peoples and Nations constitute a minority population. The Electoral Body will determine the special constituencies. These constituencies are part of the total number of deputies.

Law 026 Electoral Regime Law (Ley n026, Ley del Régimen Electoral), last amended March 2025, accessed 25 August 2025

ARTICLE 50. (ELECTORAL CIRCUMSCRIPTIONS). For the purpose of electing authorities and representatives at the national, departmental, regional, municipal, and rural native indigenous autonomies, the following electoral districts are established: 

I. For the election of national authorities and representatives: 

a) A national constituency, which includes the electoral seats located abroad, for President or President and Vice President or Vice President of the Plurinational State. 

b) Nine (9) departmental constituencies for Senators and Senators. 

c) Nine (9) departmental constituencies for multi-member Deputies and Deputies. 

d) Uninominal constituencies for deputies and uninominal deputies, defined by Law. 

e) Special constituencies for peasant native indigenous deputies, defined by law. […] 

[Paragraph I, subparagraphs d) and e) of Article 50 was modified by Article 1 of Law No. 421 “Law on the Distribution of Seats among Departments” of October 7, 2013.]

For the details of the electoral system refer to the articles 56-61.