Hans Kaarsberg (26 January 1854 – 16 March 1929) was a Danish medical doctor, writer and adventurer. In 1890, he went on a one-man expedition to Kalmykia in search of the last remains of the Kalmyk people. His account of the journey was published by Gyldendal in 1892. Among the Kalmyks of the Steppes on Horseback and by Troika: A Journey Made in 1890, an English-language translation of the book, was published by the Mongolian Society in 1996. In 2021. prompted by Kaarsberg Mysteriet, a five-episode DR podcast created by Klaus Rothstein. Kaarsberg attracted renewed attention for having inspired a young Karen Blixen's interest in travels, hunting and writing. Kaarsberg was the brother of surgeon Johannes Kaarsberg and author Ellen Reumert.