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

Alexy Shcherbakov (1858-1944) – a famous doctor, professor, curator of the Riga study region in 1913-1917.
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Lydia Shcherbakova (1918-2016) – a surgeon, chief physician of the Republican Clinical Hospital named after P. Stradins from 1960 to 1979, Honored Doctor of the Latvian SSR (1966). >>

Alexander Shvangeradze (1905-1941) – a surgeon, shot by Nazis. >>

Polina Sjakste (1929–2019) – a Docent of the Riga Medical Institute, from 1990 – Latvian Medical Academy. >>

Leonid Sluytsky (1927-2013) – a biochemist, professor, Habilitated Doctor of Medicine. >>

Mikhail  Solts (1919–2010) – a military surgeon, radiologist, head of the X-ray diagnostic department of the Daugavpils Republican Oncological Dispensary (1965–1996), chief radiologist of Daugavpils, one of the most qualified and oldest radiologists in Latvia. >>

Alexander Sotin (1852–1904) – a famous doctor, the first director of the sulfur water resort in Kemeri (Jūrmala). >>

Arseny Starkov (1874–1927)  – professor of Medical faculty of the University of Latvia from 1925 to 1927. >>

Nikolay Stolygvo (1900-1976) – a physician, professor. >>