Joseph, also Josef Kyselak (9 March 1798[1] – 17 September 1831) was an Austrian civil servant, mountaineer and travel writer.

The son of a family of civil servants, Kyselak was born in Vienna, where he attended the Piarist Gymnasium in the Josefstadt district.

In 1829 he published a comprehensive account of an 1825 travel through Austria, Styria, Carinthia, Berchtesgaden, Tyrol, and Bavaria to Vienna, describing the engraving on Oberkapfenberg Castle.

According to legend, he became so well known that Emperor Francis I of Austria ordered him to stop tagging public buildings and Kyselak promised to comply.

His habit earned him an entry in Constantin von Wurzbach's Biographisches Lexikon des Kaiserthums Oesterreich (Biographical dictionary of the Austrian Empire, 1856–91).