In 1909, there were 3 recorded legal changes made affecting LGBT people. In the previous year, there were 1 change made and 3 in the following year. A total of 22 legal changes were made in the 1900s.
- May 13Homosexual activity becomes male illegal, female legal.In 1909, Connecticut reduced the penalty for sodomy from life imprisonment to up to 30 years in prison. The law also continued to explicitly state that only men could be “victims”, keeping lesbianism legal.
- April 26Homosexual activity becomes illegal (other penalty).California enacted a law in 1909 that provided for the sterilization of persons convicted two or more times of sexual offences if they showed evidence while in prison of being a "moral or sexual pervert". During this period, an estimated 20,000 people were sterilised, many for same-sex sexual intercourse. The law allowing sterilisation was not repealed until 1972 but they were rare after 1950.
- January 29Homosexual activity becomes illegal (imprisonment as punishment).Laws of Washington 1909 c 249 § 204 amended the state's sodomy law to include oral sex, added a clause to specifically criminalize voluntarily submitting to 'carnal knowledge', and lowered the penalty to "imprisonment in the state penitentiary for not more than ten years".