Jonas Marcus von Königswarter (10 August 1807 – 23 December 1871) was an Austrian Jewish banker and railway entrepreneur.

He was also a member of the advisory committee of the Wiener Börse, and president of the Jewish congregation of the city.

Königswarter, however, rated far more highly than these distinctions the warm personal esteem with which Emperor Francis Joseph I regarded him.

Königswarter was president of the Jewish community of Vienna in the years 1868 and 1871 as a traditional conservative; he was an early supporter of the Alliance Israélite Universelle.

[1] He and another Ringstrasse patron, Gustav von Epstein were buried in the Wahring Jewish Cemetery.