Heidi Bertha Auguste Kabel (German: [ˈhaɪdiː ˈkaːbl̩]; 27 August 1914 – 15 June 2010) was a German actress and musician. Most of her stage roles were performed at the Ohnsorg-Theater in Hamburg, many of them in Low German. She became famous in Germany as many of the productions of the Ohnsorg Theater were transmitted on German television.

Heidi Kabel was born in Hamburg; the city and its landmarks inspired many of her best-known songs (In Hamburg sagt man Tschüss, Jungfernstiegmarsch). She was married to stage director and actor Hans Mahler, who died in 1970. Their daughter, Heidi Mahler, is also an actress.