Ephraim Katzir, Israeli biophysicist and politician, 4th President of Israel (d. 2009)

Ephraim Katzir (Hebrew: אפרים קציר Efrayim Katsir; 16 May 1916 – 30 May 2009) was an Israeli biophysicist and Labor Party politician. He was the fourth President of Israel from 1973 until 1978.