Külli Palmsaar (born 1 October 1966) is an Estonian actress. Palmsaar was born in Tallinn, Estonia, on 1 October 1966 and graduated from the Tallinn State Conservatory (now, the Estonian Academy of Music and Theatre) in 1988.

Among her graduating classmates were actors Dajan Ahmet, Epp Eespäev, Merle Jääger, Piret Kalda, Elmo Nüganen, Anne Reemann, Rain Simmul, Artur Talvik, Hendrik Toompere Jr. and Raivo E. Tamm.