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 ().
Transgender disenfranchisement in the United States
The Williams Institute on Sexual Orientation and Gender Identity Law and Public Policy estimated that by requiring voters to present a government-issued photo ID at the polls, nine states may have disenfranchised over 25,000 transgender people in the November 2012 presidential election, because poll workers are unlikely to have training on how to handle transgender people, and may erroneously suspect voter fraud.