Halja Klaar (December 17, 1930 – February 20, 2021) was an Estonian production designer.
After she graduated from the Antsla Gymnasium in 1950, Klaar entered the Estonian Academy of Arts, graduating in 1957 with a degree in theatrical decoration. From 1957 to 1986, she worked as a production designer at Tallinnfilm. She worked on 20 feature films.