In 1919, there were 4 recorded legal changes made affecting LGBT people. In the previous year, there were 1 change made and 1 in the following year. A total of 24 legal changes were made in the 1910s.
- August 19LGBT housing discrimination becomes no protections.
- LGBT discrimination becomes no protections.
- July 6Gender-Affirming Care becomes legal.In 1919 the non-profit foundation Institute for Sexual Science was founded in Berlin by Magnus Hirschfeld, becoming the first sexology research center in the world. The institute provided a range of endocrinologic and surgical services, including an early form of modern sex reassignment surgery in 1931. Ludwig Levy-Lenz, the institute's primary surgeon for transgender patients, pioneered early facial feminization and masculinization procedures, alongside developing hair removal treatments utilizing the institute's X-ray facility.