Flávio Dino de Castro e Costa (born April 30, 1968) is a Brazilian attorney, politician and teacher.
A former federal judge, Dino was elected to the Chamber of Deputies in 2006, serving a four-year term until 2011, representing the state of Maranhão.
He ran for governor of Maranhão in the 2014 election, and was elected.
He became the governor of Maranhão on January 1, 2015.Dino also served 3 years as president of Embratur, a federal agency promoting Brazilian tourism, between his legislative ter and gubernatorial term.