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- Estácio de Sá, soldier (1965)
- Salvador Correia de Sá e Benevides, Portuguese soldier and politician (1940)
- Albert Sabin, US immunologist (1994)
- Augustin de Saint-Hilaire, French botanist (1953)
- Luís Filipe de Saldanha da Gama, admiral (1946) article in Portuguese
- Vicente do Salvador, priest and historian (1967) article in Portuguese
- Antônio de Sampaio, general (1967) article in Portuguese
- José Francisco de San Martín, Argentine general and hero of independence (1909)
- José de Santa Rita Durão, poet (1981)
- Cármen Santos, film actress, producer and director (1990) article in Portuguese
- Edgard Santos, physician and educator (1994) article in Portuguese
- Alberto Santos-Dumont, aviator (1929, 1951, 1969, 1973, 1981, 1998, 1999, 2002, 2008)
- Bernardo Saião, politician (2001) article in Portuguese
- Giuseppe Saragat, Italian president (1965)
- José Antônio Saraiva, politician (1952)
- José Sarney, president (1990)
- Bidú Sayão, opera singer (2006)
- Alfredo Vicente Scherer, cardinal (2004)
- Guilherme Schüch, barão de Capanema, engineer and naturalist (1952) article in Portuguese
- Raul Seixas, rock star (1991)
- Léopold Sédar Senghor, Senegalese president and poet (1964)
- Lasar Segall, Lithuanian-born painter (1991)
- Ayrton Senna, race car driver (1989, 1994, 2000)
- Augusto Severo, aviator (1929)
- Zalman Shazar, Israeli president (1966)
- Luís Alves de Lima e Silva, Duke of Caxias, military leader and politician 1935, 1939, 1944, 1953, 1954, 1956, 1971, 1980, 2003, 2008
- Luiz Inácio Lula da Silva, president (2011)
- Francisco Manuel da Silva, composer (1945)
- José da Silva Lisboa, Viscount of Cairu, economist (1936) article in Portuguese
- José da Silva Paes, general (1937)
- Joaquim José da Silva Xavier, hero of independence (1948, 1965, 1992, 2008)
- Nise da Silveira, psychiatrist (2005)
- Ernesto Simões Filho, journalist (1986) article in Portuguese
- Lauro Sodré, general and politician (1958) article in Portuguese
- Anastasio Somoza, Nicaraguan president (1953)
- Gabriel Soares de Souza, naturalist (1987)
- Irineu Evangelista de Sousa, Baron of Mauá, industrialist and politician (2010)
- Martim Afonso de Sousa, Portuguese explorer and colonizer (1932, 1982)
- Herbert José "Betinho" de Souza, sociologist and human rights activist (1998)e
- Joaquim Silvério de Souza (1859–1933), bishop (1959) article in Portuguese
- Thomé de Souza, governor-general (1949)
- Sukarno, Indonesian president (1959)
- Anne Sullivan, American teacher and companion to Helen Keller (1980)
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