Alexander Ernst Fesca (22 May 1820 in Karlsruhe – 22 February 1849 in Braunschweig) was a German composer and pianist.
Fesca received his first lessons from his father and made his debut at the age of 11 as a pianist in his hometown.
Fesca was known during his short life mostly through his songs and piano pieces in which his talent is coupled with a certain musical lightness.
In the local court theater on 25 July 1847 was premiered Fescas major work, five-act heroic-romantic opera "Il Trovatore" with a libretto by Frederick Schmetzer.
On 22 February 1849, Alexander Ernst Fesca, aged 28, died of lung disease in Braunschweig.