Josef Kaizl (10 June 1854, Volyně[1] – 19 August 1901, Myslkovice) was a Czech professor, economist, and politician in the Austro-Hungarian Empire.

Born into the family of Eduard Kaizl, controller of inland revenue, and a German speaking mother.

Josef Kaizl, alongside Albín Bráf, was later appointed as the first Czech economist of Charles University.

Kaizl believed Czech national revival derived its true roots from the French and American Revolutions.

Kaizl played a critical role in becoming a moderating force against radicalism in the Young Czech party.

This resolution called for "constructive opposition" against "false radicalism" found in the Young Czech party.

[6] In 1895 Masaryk and Kaizl had a disagreement due to Masaryk's criticism of liberalism and his support of the idea that common Czech national identity is rooted from the Czech Hussites; Kaizl instead advocated for the standard European liberal ideology and nationalism.

Kaizl defined the concept of phasing politics, and said that the young Czechs are temperamentally connected to the liberalism and democratization of Austria-Hungary.

During this election the Young Czechs splintered but Kaizl led the majority faction and in the following months was successful in elimination the radicals.

Kaizl would remain the de facto head of the Young Czechs, and repeatedly acted as a moderating element.

Kaizl would defend his seat in parliament and the Vienna Imperial Council until his death, where he would then be replaced by the deputy chair Franz Fiedler.