Korney Ivanovich Chukovsky was one of the most popular children's poets in the Russian language. His catchy rhythms, inventive rhymes and absurd characters have invited comparisons with the American children's author Dr. Seuss. Chukovsky's poems Tarakanische, Krokodil, Telefon and Moydodyr ("Wash-'em-Clean") have been favorites with many generations of Russophone children. Lines from his poems, in particular Telefon, have become universal catch-phrases in the Russian media and everyday conversation. He adapted the Doctor Dolittle stories into a book-length Russian poem as Doctor Aybolit, and translated a substantial portion of the Mother Goose canon into Russian as Angliyskiye Narodnyye Pesenki. He also wrote very popular translations of Walt Whitman, Mark Twain, Oscar Wilde, Rudyard Kipling, O. Henry, and other authors, and was an influential literary critic and essayist.

Korrie Layun Rampan was an Indonesian novelist, short story writer, poet, literary critic, journalist, and politician.

Kōsaku Hamada , also known as Seiryō Hamada, was a Japanese academic, archaeologist, author and President of Kyoto University.

Kosho Uchiyama was a Sōtō priest, origami master, and abbot of Antai-ji near Kyoto, Japan.

Kōshū Tani is a Japanese science fiction writer. He graduated from the Osaka Institute of Technology, and worked as a volunteer in Nepal and the Philippines. He made his professional debut with the story 137th Mobile Brigade in 1979 while still in Nepal.

Kosmas Balanos (1731–1808) was a Greek mathematician, author and school director. He continued the work of his father Balanos Vasilopoulos, and was among Greece's leading scholars of his time.

Gustaf Adolf Lindström, better known under his pen name Kössi Kaatra, was a Finnish working-class poet, journalist and theatre director.

Kosta Abrašević or Kosta Abraš was a Serbian poet, progenitor of proletarian poetry in Serbian literature.

Kosta Georgievich Dzugaev, is a South Ossetian politician, who is a former chairman (speaker) of the Parliament of South Ossetia.

Konstantin (Kosta) Khetagkaty was a national poet of the Ossetian people who is generally regarded as the founder of Ossetian literature. He was also a talented painter and a notable public benefactor. He is often known by the Russian version of his name, Kosta [Levanovich] Khetagurov