Herta Ehlert (née Liess; 26 March 1905 – 4 April 1997) was a female guard at many Nazi concentration camps during the Holocaust.

Ehlert was later moved to the Auschwitz concentration camp as an Aufseherin, where she oversaw women commanding Kommandos (slave labor groups).

Ehlert later served as a guard at the Auschwitz subcamp in Rajsko, Poland,[5] before she was transferred to the Bergen-Belsen concentration camp, where she became deputy wardress under Oberaufseherinnen Elisabeth Volkenrath and Irma Grese.

[6] Halina Nelken described Ehlert at Plaszow in these words: "immensely obese, sly, vicious in character, and an absolute master in using the whip.

Through a small window, she would spy on the Jewish women while they were at work peeling potatoes or onions, washing dishes, and doing other chores necessary in the kitchen.