La Paz Department (Spanish: Departamento de La Paz) was a department of Bolivia, a constituent country of the Peru–Bolivian Confederation, which existed from 1836 to 1839.

La Paz sent deputies to the Congress of Tapacarí in June 1836, where the Bolivian government, under the command of General Andrés de Santa Cruz agreed that after the military intervention in Peru, give recognition to the creation of the Peruvian-Bolivian Confederation.

[2] The Fundamental Law of 1837, signed in the city of Tacna, with the approval of the self-proclaimed supreme protector Andrés de Santa Cruz, recognized La Paz as a founding department of the Confederation.

[3] La Paz was subject to the General Government, its governor was appointed by the president of the State, and this in turn was appointed by the supreme protector on duty.

The governor was obliged to elect representatives of his department to participate in congressional meetings, which were ordered by the president of the Bolivian State.