Vladimir Sadikov (1874-1942) – a biochemist, scientific collaborator of resort Kemeri (Riga Seaside), later professor of the Leningrad State University. >>

Firs Sadovnikov (1789–1853) – a merchant of the 1st guild, donor. >>

Gennady Sagalovich (1936-2015) – Habilitated Doctor of Engineering (Dr. habil. sc. ing.), Professor of the Riga Technical University. >>

Sergey Sakharov (1880-1954) – teacher, historian of the Russian Orthodox Church, ethnographer, publicist. >>

Alexander Sallak (1885 -?) –  a teacher of History and Russian, Deputy Head of the Russian department of the Ministry of Education of the Republic of Latvia from 1920 to 1934. >>

Yevgeny Sallinen (1954-2009) – Doctor of Maths, Docent of the Chair of Higher mathematics of the Riga Technical University. >>

Margarita Saltupe (born Morozova; 1917-2006) – a physician, popularizer of the artist Eugene Klimoff's (1901-1990) creativity >>

Feodor Samansky (1719–1794) – in 1760 consecrated the first prayer-house for Old Believers in Riga, nowadays known as the Riga Grebenshchikov Temple. >>

Yuri Samarin (1819-1876) –  a public figure, publicist, Slavophile.  >>

Georgy Samsonov (1930) – а sea captain of the Latvian Shipping Company. >>