Caroline Friederike Wilhelmine Demmer (née Krüger; 12 February 1764 – 14 April 1813) was a German-Austrian actress and singer.
In 1786–87 she was engaged by Joseph Bellomo in Weimar, in 1788–89 by Gustav Friedrich Wilhelm Großmann, then by the Dietrichsche Gesellschaft, where she married the singer and actor from Cologne Carl Demmer.
In spring 1804 both finally accepted an engagement at the Theater an der Wien, and travelled from Frankfurt via Regensburg, where they arrived on 7 March[5] to Vienna.
Demmer made his debut there on 8 August 1804 at the Theater am Kärntnertor as wife of Duval in the comedy Viktorine oder Wohlthun trägt Zinsen by Friedrich Ludwig Schröder.
[6] In 1813 the family lived on Laimgrube [de] No 26, thus in an official residence of the Theater an der Wien, where Demmer died on 14 April 1813 at the age of 49 "from a lung addiction" (tuberculosis).