The Secretariat of Institutional Affairs (Portuguese: Secretaria de Relações Institucionais) is an agency linked to the Presidency of the Republic of Brazil.

It acted in the following areas:[2][3] It had its structure and organization defined by Decree no.

On 7 April 2015, the attributions of Institutional Affairs were transferred to the Vice President Office, at the time headed by Michel Temer, and the Secretariat was dissolved.

[5] On 2 October 2015, the Secretariat of Government was created, which merged, among other attributions, the Institutional Affairs and political articulation with the Congress.

On 1 January 2023, it was reinstated by President Luiz Inácio Lula da Silva.