Starting on April 11, U.S. citizens will be able to select an X as their gender marker on their U.S. passport application

Starting on April 11, U.S. citizens will be able to select an X as their gender marker on their U.S. passport application, and the option will become available for other forms of documentation next year.

When the agency announced  in June that they had begun this work, they referred to the addition of a third gender marker for non-binary, intersex, and gender non-conforming individuals. After thoughtful consideration of the research conducted and feedback from community members, the agency concluded that the definition of the X gender marker on State Department public forms will be “Unspecified or another gender identity.” 

Information on how to apply for a passport with this new option can be found here:

You can select the gender marker you would like printed on your U.S. passport. The gender you select does not need to match the gender on your supporting documentation such as a birth certificate, previous passport, or state ID.

Beginning April 11, 2022, you can select male (M), female (F), or unspecified or another gender identity (X) as your gender marker if you are applying for a U.S. passport book and selecting routine service. Beginning in late 2023, you will be able to select X as a marker if you are seeking a passport card or selecting expedited service. By late 2023,  additional technological updates so that the X gender marker will be available on the following documents:

• Passport cards
• Emergency passports printed at embassies and consulates 
• Expedited and emergency passports issued at passport agencies and centers, and
• Consular Reports of Birth Abroad (CRBAs)

Website: https://travel.state.gov/content/travel/en/passports/need-passport/selecting-your-gender-marker.html