Country of origin: England
Elizabeth Blackwell (3 February 1821 – 31 May 1910) was the first female doctor in the United States and the first on the UK Medical Register. She was the first openly identified woman to graduate from medical school, a pioneer in educating women in medicine in the United States, and was prominent in the emerging women's rights movement.
To find out more about this pioneering woman, visit her page on Wikipedia.
Also I'd like to wish everyone a happy International Women's Day!