Freiherr Ernst Merck (20 November 1811 – 6 July 1863) was a German businessman and politician.
Merck, born in Hamburg, was a member of the Frankfurt Parliament for a year from 1848 to 1849.
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.