Myrtle E. Johnson

| birth_date = June 4, 1881 | birth_place = East Troy, Wisconsin, US |death_date = | death_place = San Diego, California, US | residence = | nationality = American | ethnicity = | fields = Marine Biology | work_institution = San Diego State University | alma_mater = University of California, Berkeley | known_for = | author_abbrev_bot = | author_abbrev_zoo = | signature = | signature_alt = | footnotes = }}

Myrtle Elizabeth Johnson (1881 – 1967) was an American marine biologist, ascidiologist, and educator in California in the early 20th century. She was the first woman PhD faculty member at the San Diego State College (now San Diego State University), where she taught from 1921 to 1946, and was chair of the Biology department from 1928 to 1940. Her major work, ''Seashore Animals of the Pacific Coast'', published in 1927, was the standard descriptive text of intertidal species until Ed Ricketts's ''Between Pacific Tides'' was published in 1939. Ricketts considered Johnson's book "the ''vade mecum'' of marine biologists of the Pacific. Indispensable." Provided by Wikipedia