Sergo Kldiashvili was a Georgian and Soviet prose-writer who set out to be Symbolist but then was drawn to conformist Realist prose under Soviet rule.

Serhii Mykolaiovych Babkin is a Ukrainian singer and actor who became the lead singer of the 5'nizza music band, the coach of the Holos Krainy, and the participant in the Tantsi z zirkamy.

Serhii Plokhy, or Plokhii is the Mykhailo Hrushevsky professor of Ukrainian history at Harvard University, where he also serves as the director of the Harvard Ukrainian Research Institute.

Serhii Shevchenko, born August 4, 1960 in Kramatorsk, Ukrainian SSR, Soviet Union, is a Ukrainian writer, journalist and editor. Merited Journalist of Ukraine.

Serhiy Dmytrovych Osachuk is a Ukrainian historian and politician. He served as Governor of Chernivtsi Oblast from 2019 to 2022.

Serhiy Podolynsky was a Ukrainian socialist, physician, and an early pioneer of ecological economics. He set out to reconcile socialist thought with the second law of thermodynamics by synthesising the approaches of Karl Marx, Charles Darwin and Sadi Carnot. In his essay "Socialism and the Unity of Physical Forces" (1880), Podolinsky theorized a labor theory of value based on embodied energy.

Serhiy Ivanovych Rakhmanin is a Ukrainian journalist and politician currently serving as a People's Deputy of Ukraine on the proportional list of the Holos party since 2019. Prior to his election, he was the deputy chief editor at Dzerkalo Tyzhnia and a reporter for other Ukrainian news programmes.

Serhiy Viktorovych Zhadan is a Ukrainian poet, novelist, essayist, musician, translator, and social activist.

Sero Nikolayi Khanzadyan was a Soviet and Armenian writer and novelist.

Sesson Yūbai was a Japanese Zen Buddhist monk of the Rinzai sect. This priest and poet who is considered "the first important poet of the Five Mountains.