Bartok spent several years in a German concentration camp, eventually marrying a Nazi officer. After the war, the marriage was annulled on the grounds of coercion of a minor. She had three other marriages, all of which ended in divorce. Her final husband was actor Curd Jürgens (1955–56). Her daughter Deana was born in 1957, shortly after her marriage to Jürgens ended. Three decades later, she claimed that Deana's father was actually Frank Sinatra, with whom she had a brief affair in 1956. She also had a publicized affair with David Mountbatten, 3rd Marquess of Milford Haven for several years.

Also during the 1950s, Bartok suffered a bout with ovarian cancer. She experienced an allegedly miraculous recovery after being spiritually "opened" in Subud.

She died on August 1, 1998.

Eva Bartok was married to: