Opposition (56) The Chamber of Deputies of Buenos Aires Province (Spanish: Cámara de Diputados de la Provincia de Buenos Aires) is the lower house of the Legislature of Buenos Aires Province, the largest and most populous of Argentina's provinces.

The number of deputies that correspond to each of the electoral sections is proportional to their population, as observed in the results of every nationwide census conducted in Argentina every 10 years.

Its precursor, the Board of Representatives (Junta de Representantes) was established in 1820 as the province's first functioning legislative lower house.

The body meets in the Legislative Palace, designed by Hannover architects Gustav Heine and Georg Hagemann in 1883 and completed in 1888.

[2] The President of the Chamber of Deputies is elected by the absolute majority of its members.