Adhemar Pereira de Barros (22 April 1901 – 12 March 1969) was the mayor of São Paulo (1957–1961), and twice elected Governor of São Paulo (1947–1951 & 1963–1966).
Barros was born in Piracicaba, Brazil. He was the federal interventor in the state of São Paulo nominated by Brazilian dictator Getúlio Vargas, serving between 1938 and 1941. Following the re-democratization, he was elected Governor of São Paulo with a large margin in the 1947 elections, relying on a large coalition which included working-class support. Known to be a populist, he built a strong electoral machine, the Social Progressive Party (PSP), which dominated state politics until 1964. He was accused of being corrupt, but he was responsible for advances in social legislation and infrastructure: his candid supporters said "rouba mas faz" (he steals but he gets things done). He did not run for re-election in 1950, and was defeated by Jânio Quadros in 1954, before winning in 1962.
