Aron Grünhut (31 March 1895 – 6 May 1974) was a Bratislava-based Jewish activist who helped 1,365 Slovak, Czech, Hungarian, and Austrian Jews illegally emigrate to Palestine before and during World War II.

In October 1938, Grünhut rescued Juda Goldberger, a Bratislava clothing merchant, who was kidnapped and arrested in Austria on the orders of the Gestapo.

After Grünhut learned of the Kindertransports to England, which Sir Nicholas Winton had organized in Prague, he managed to ensure that a group of Jewish children could leave Bratislava.

To do this, he hired two luxury Danube steamers (Queen Elizabeth and Zar Dusan), which left the Port of Bratislava with 1,365 refugees from Slovakia, Austria, Bohemia and Moravia.

The boat trip, which was initially planned for six days, was significantly extended due to reprisals by the Bulgarian and British authorities, so that the refugees ultimately had to spend more than four weeks in international waters on the Danube.

Only after Grünhut's difficult and intensive negotiations were they able to board the cargo ship Noemi Julia in the Romanian port of Sulina in the Danube Delta on the Black Sea and, after another exhausting 83 days, arrive at their destination in Haifa.

Even after the outbreak of the World War II, Grünhut did not want to leave his hometown of Bratislava and remained active in the Jewish resistance.

Grünhut never forgot this: towards the end of the 1960s, he ensured that Zima received Israel's highest civil award for foreigners, "Righteous Among the Nations".

In later years he summarized his memories of Jewish Orthodox Bratislava and the persecution of Slovak Jews in the book Katastrophenzeit des Slovakischen Judentums – Aufstieg und Niedergang der Juden von Pressburg, which was published in German in Tel Aviv in 1972.