Loritz was born in St. Gallen, Switzerland. After her primary studies in her home town, she moved to Munich, where she studied dramatic arts.
Loritz moved to Spain in the mid-1950s and soon after started her Spanish movie career with the movie Las manos sucias (1957), by José Antonio de la Loma.
With her next movie Las chicas de la Cruz Roja (1958) by Rafael J. Salvia, which was successful at the box-office, she became very popular.
This allowed her to act in some of the most important productions of that time.
Spanish actress Katia Loritz died August 16, 2015 at the age of 82.