New Zealand enfranchised its female citizens in 1893, making it the first nation or territory to formally allow women to vote in national elections. At least 19 other countries also did so prior to the U.S. passage of the 19th Amendment in 1920, according to Pew Research analysis. These countries are spread across Europe and Asia, and about half first gave women this right while under Russian or Soviet control or shortly after independence from Russia. Russia itself extended the vote to women after demonstrations in 1917. In at least eight additional countries, some women – but not all – gained equal voting rights in or before 1920.
Details at Pew
Source: Pew Research, NZHistory, Infoplease