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 ().
LGBT adoption in the United States
According to the Williams Institute, as of 2009 "an estimated 20,000 same-sex couples are raising nearly 30,000 adopted children." As of 2011, approximately two million children in the United States were being raised by LGBT parents and unable to establish a legal relationship with both their LGBT parents. The 2010 U.S. Census reported that same gender couples are raising approximately 115,000 children, 18 years and younger and are living in essentially all counties of the United States.