Ronaldo Fonseca de Souza (born 4 April 1959 in Volta Redonda) is a Brazilian lawyer and politician, member of the Podemos (PODE).
He was elected Federal Deputy from Distrito Federal in 2010, and was appointed by president Michel Temer as Secretary-General of the Presidency of Brazil.
Fonseca is also a pastor of the Assembleias de Deus church.