Wanda Klaff was a Nazi camp overseer.

She was born on March 6, 1922, in Danzig to German parents as Wanda Kalacinski. She finished school in 1938 and began working in a jam factory . This lasted until 1942 when she married Willy Gapes and became a housewife. In 1944 Wanda joined the camp staff at the Stutthof subcamp at Praust (Pruszcz). There, according to the common opinion, she abused many women. On October 5, 1944, Wanda Gapes arrived at the Russoschin subcamp of Stutthof (today northern Poland). There she continued her activities, which described as abuse and sadistic acts by Third Reich opponents. She fled the camp in early 1945. On June 11, 1945, Wanda was arrested by Polish officials and after laid in prison with typhoid fever. She stood trial with the other former SS women. She stated at the trial, "I am very intelligent and very devoted to my work in the camps. I struck at least two prisoners every day". She was found guilty and received a sentence of death for her abuse. She was publicly hanged on July 4, 1946, on Biskupia Gorka Hill near Gdańsk.