Esther Streit-Wurzel (Hebrew: אֶסְתֵּר שְטְרייט-ווֹרְצֶל; July 25, 1932, − December 7, 2013) was an Israeli children's author and educator.
Streit-Wurzel was born in Petach Tikva, Central District, in Mandatory Palestine. Her father, Shalom Streit, was an educator who founded Ahad Ha'am Gymnasium in Petach Tikvah. She wrote her first book at age 12, in 1994, under the pen name Zvi Hadas, as she was too shy to credit herself with her work. She graduated from the Hebrew University of Jerusalem in 1952, with a degree in literature and psychology. Apart from writing, she was also an educator.
Esther Streit-Wurzel died following a serious illness on 7 December 2013, aged 81, in Petach Tikva, Central District, Israel. Her funeral took place the next day on 8 December and was attended by thousands. She was survived by her husband and three children.