Transgender
One effort to quantify the population gave a "rough estimate" that 0.3 percent of adults in the US are transgender, overlapping to an unknown degree with the estimated 3.5 percent of US adults (1-in-30) who identify as LGBT. More recent studies released in 2016 estimate the proportion of Americans who identify as transgender at 0.5 to 0.6%. This would put the total number of transgender Americans at approximately 1.4 million adults ().
Discrimination against non-binary gender people
According to the Transgender Law Center, 70% of transgender people are not able to update their identity documents and one-third of have been harassed, assaulted or turned away when seeking basic services,
and one third are not able to update their documents post-transition.
In 2016, the U.S. State Department was sued for denying a passport to Dana Zzyym, who is a veteran and an intersex and non-binary person. Zzyym wrote "intersex" on their passport form instead of male or female, which were the only two available gender fields on the form. Zzyym was denied the passport, which led to LGBTQ advocacy organizations filing a lawsuit against the U.S. State Department on Zzyym's behalf. The advocacy group Lambda Legal argued for gender-neutral terms and a third option on U.S. passports, arguing that the existing passport fields violated the Due Process Clause and Equal Protection Clause of the U.S. Constitution. The State Department argued that adding additional gender fields to the passport form would prevent the agency's efforts to combat identity theft and passport fraud. The Tenth Circuit Court ruled in favor of Zzyym, the first time in U.S. history that the federal government recognized non-binary people.