Yehudith Birk (Hebrew: יהודית בירק; 30 September 1926 – 14 January 2013) was a Polish-born Israeli biochemist, awarded the 1998 Israel Prize for agricultural research.
Gershtanski attended the school for workers’ children on Lasalle Street in Tel Aviv.
From 1948–49, she served in the Israel Defense Forces' science corps, achieving the rank of second lieutenant in a scientific research unit which was developing and testing parachute flares which would be dropped from planes to illuminate enemy territory.
Around 1948, at the onset of the 1947–1949 Palestine war, Gershtanski married a physicist with the Weizmann Institute, Meir Birk (born 1924 – died 2000), whom she had first met in 1937, when she was eleven years old, as he was the son of her parents' landlords on Balfour Street, Tel Aviv.
In 1978, Birk received the Rothschild Prize and the Mo'ezet Irgunei Nashim be-Yisrael Medal for her accomplishments in research and teaching.