Jan Weiss (10 May 1892 – 7 March 1972) was a Czechoslovak writer, best known for his surrealist novel House of a Thousand Floors (Czech: Dům o Tisíci Patrech).

In 1924 his story "A Dream" (Czech: Sen) was published in Cesta magazine, and then later in the same year in Národní Osvobození (English: national liberation).

In the years 1926-1927 Penza was published in Legionářské besedy, with the help of editor-in-chief Josef Masařík, for which Weiss received the Award of the Czech Academy.

In 1926 he met his future wife Jaroslava Rašková, whom he married in 1928 in the Old Town Hall of Prague, with Ladislav Plechatý and Josef Masařík as witnesses.

That same year he published his most well-known work, House of a Thousand Floors (Czech: Dům o Tisíci Patrech), one of the first science fiction novels in European literature.