Stefan Kisielewski (7 March 1911 in Warsaw – 27 September 1991 in Warsaw, Poland), nicknames Kisiel, Julia Hołyńska, Teodor Klon, Tomasz Staliński, was a Polish writer, publicist, composer and politician, and one of the members of Znak, one of the founders of the Unia Polityki Realnej, the Polish libertarian and conservative political party.

As a composer, Kisielewski remained firmly rooted in French neo-classicism, although his writings supported contemporary musical trends in Poland more broadly (Thomas 2001).

His writing and political thought were generally marked by pragmatism and support for liberalism.

In 1964 he was one of the signatories of the so-called Letter of 34 to Prime Minister Józef Cyrankiewicz regarding freedom of culture.

In 1968, for criticizing censorship in communist Poland (at the meeting of the Polish Writers' Union he used the designation 'dyktatura ciemniaków' – 'a dictatorship of dunces' – which became famous in Poland), he was forbidden to publish for three years.