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. >>

Alexander Schwartz (1848-1915) – a Curator of the Riga School District, Minister of Education of the Russian Empire, classic philologist. >>

Anna Segediy (nee Lishina; 1896-1944) –  a teacher of Russian and German. >>

Yakov Serafimov (1884-1949) – a teacher  of Math at the Riga city Russian gymnasium (former Lomonosov). >>

Lydia Seraya (1936-2020) –  a teacher of Latvian and Russian. >>

Fyodor Serkov (1883–1962) –  a teacher,  from 191 to 1915 co-owner of the Private School in Riga. In 1924–1925 – Head of the Russian Division of the Department of National Minorities of the Ministry of Education of the Republic of Latvia. >>

Semyon Shafranov (1820–1888) – a philologist, teacher, director of gymnasiums, public figure, initiator and founder of Russian societies: "Bayan", "Lado", "Uley", "Russian Club", etc. >>

Elizaveta Shenkolovich (née Danilova; 1882 -?) – a teacher, principal of the Riga 8th Russian primary school from 1921 to 1937. >>

Alexey Shershunov (1889-1970) – a teacher, Principal of the Riga 4th Russian Elementary school from 1932 to 1941. In July 1940 was elected to the People`s  Saeima of Latvia. >>