It comprises 43 members elected in eight multi-member constituencies known as Electoral Sections.

The number of senators 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.

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

The Vice Governor may only cast tie-breaking votes (according to article 93 of the provincial constitution).

[4] The following is a list of vice governors of Buenos Aires since the return of democracy in 1983.