Erna W. Mohr (July 11, 1894 – September 10, 1968) was a German zoologist who made contributions to ichthyology and mammalogy.

She was a member of the Academy of Sciences Leopoldina and held an honorary doctorate from the University of Munich.

Between 1914 and 1934 she taught high school while volunteering at the Zoological Museum Hamburg and also published scholarly and popular scientific articles.

[3] She became a member of the American Society of Mammalogists in 1928,[4][a] and in 1959 she wrote a monograph on the endangered Przewalski's horse, a "pre-emininet compendium... that can never be surpassed for its firsthand accounts of the early history of the species".

She was buried in the Ohlsdorf Cemetery's Garden of Women, with a statue of a hutia (a large rodent) marking her grave.