Thea Miesl was a female Nazi guard in several concentration camps during World War II.

Thea (Therese) Miesl (or Miesel) was born in Munich-Feldmoching, a Munich suburb on October 15, 1922. She worked various jobs, until her conscriptment into the SS Women's Auxiliary (SS Gefolge) in early October 1944. On October 15, 1944, her twenty-second birthday, she entered the Ravensbruck concentration camp to begin her new career, a female guard in Nazi camps. For four weeks Thea trained under SS Stellvertretende Oberaufseherin (Replacement Chief Wardress) Dorothea Binz in the finer points of "Schadenfreude" (malicious pleasure). In mid-November 1944, Thea was one of several guards to guard a transport of women prisoners to the Dachau concentration camp near her home town of Munich. Somewhere between December 1944 and March 1945 Thea Miesl once again oversaw a transport of women prisoners to the Kaufering subcamp near Landsberg, Germany. Only a handful of women guards served in the chain of camps, nineteen subcamps in all, nine for women. In the camps, Thea was a cruel and cold hearted guard. She used abuse and brute force to terrorize female prisoners. In early April 1945, while the Kaufering camps were being evacuated, Thea left and went back to her home in Munich-Feldmoching. She has never been prosecuted for her war crimes.