Freiherr Ernst Merck (20 November 1811 – 6 July 1863) was a German businessman and politician.
Merck was also the cavalry chief of the Hamburg Citizen Militia, founder of the Zoological Garden in Hamburg, and initiator of an association to rescue shipwrecked persons. In 1853 Merck was appointed as consul for Austria in Hamburg and later ennobled by the Austrian Emperor.
- "Ernst Merck", Allgemeine Deutsche Biographie (ADB) (in German), 21, Leipzig: Duncker & Humblot, 1885, pp. 398–399