Ernst van 't Hoff (13 July 1908 – 17 May 1955) was a Dutch jazz pianist and bandleader.
In 1936 he worked with Jean Omer, then played in the dance orchestra of the Algemene Vereniging Radio Omroep under Hans Mossel.
In 1940, after the Netherlands became Nazi-occupied territory, van 't Hoff was ordered to start a big band to play state-approved dance music, but he played some jazz anyway, recording songs such as "Pennsylvania 6-5000" and "In the Mood".
He was repeatedly taken into custody by the Gestapo and eventually, in April 1944, was dismissed from his post and moved back to Belgium.
Once Allied troops had retaken western Europe, he began playing for American servicemen.