The option to use an 'X' sex marker on U.S. passports to indicate a non-binary or unspecified gender was introduced in 2021 under President Joe Biden.
January 01, 2021
high
temporal
Policy change allowing a non-binary/unspecified sex marker on passports.
Male and female sex markers began to be listed on U.S. passports in 1976.
January 01, 1976
high
temporal
Historical practice regarding sex markers on U.S. passports.
Sex markers began appearing on U.S. passports in the mid-1970s.
January 01, 1975
high
temporal
Historical introduction of sex/gender markers on U.S. passports.