Mabel Simis Ulrich (1876 – August 12, 1945) was an American medical doctor and health educator, lecturing nationally on sex and hygiene for the YWCA.

[4][5] Ulrich practiced medicine in Minneapolis, where she served on the vice commission,[6] the Board of Public Welfare,[7] and the Health and Hospitals committee.

[13] Her pamphlet "Mothers of America" (1919), aimed at young women, has been described as an unusually direct, detailed, and informative example of the genre from before World War I.

[23][24] She edited a collection of essays by women, titled The More I See Of Men (Harper & Brothers, 1932), with an introduction by Frederick Lewis Allen.

[26] Mabel Simis Ulrich died in 1945, aged 69 years, when she fell off a cliff[27] while staying at her summer home in Marine on St. Croix, Minnesota.