Flávio Dino de Castro e Costa (born 30 April 1968) is a Brazilian attorney, Supreme Court Justice, politician and professor.

A former federal judge, Dino was elected to the Chamber of Deputies in 2006 under the Communist Party banner, serving a four-year term until 2011, representing the state of Maranhão.

[6] While performing his duty as Minister of Justice, Flávio Dino was nominated by President Lula to the Supreme Court of Brazil, being sworn in office on 22 February 2024 after his confirmation by the Brazilian Senate.

[1] In 2008, he ran for election as the mayor of São Luís, but was defeated by João Castelo of the Brazilian Social Democracy Party (PSDB).

[1] He campaigned on promises of anti-corruption, expanding clean water access, launching a housing construction and renovation program, and improving public security.