Carlos Frederico Werneck de Lacerda (April 30, 1914–May 21, 1977) was a Brazilian journalist and politician.

Starting his political career in 1947, Lacerda was elected to the legislative chamber (city council) of the city of Rio de Janeiro. In 1950 he was elected a UDN party representative for the state of Rio in the Chamber of Deputies. He became well-known for his opposition of the government of President Getúlio Vargas, even demanding Vargas' overthrow.

He survived an assassination attempt in August 1954 which became known as the crime of Rua Tonelero.

An opinionated and controversial politician, Lacerda was involved in the crisis of the resignation of President Jânio Quadros in 1961 and conspired against the presidency of João Goulart. Hoping to be elected president in the 1965 elections, Lacerda initially supported the military coup d'état of 1964 and was nominated the UDN candidate. Since the military was not willing to give up power, the 1965 elections were cancelled and Lacerda began to oppose the regime. In 1968, due to his efforts to restore democracy in Brazil by allying with his old enemies Kubitschek and Goulart, Lacerda was arrested for a brief period and stripped of his right to run for political office for 10 years. After that, he retired from politics and resumed his journalism and publishing career. In 1977 he died suddenly in Rio de Janeiro.