121,290 interviews were conducted between June 1 and Sept. 30, 2012 by Gallup. The question people had to answer was: "Do you, personally, identify as lesbian, gay, bisexual, or transgender?"
What are the results?
First of all, the survey shows "4.6% of African-Americans identify as LGBT, along with 4.0% of Hispanics and 4.3% of Asians. The disproportionately higher representation of LGBT status among nonwhite population segments corresponds to the slightly below-average 3.2% of white Americans who identified as LGBT."
Then, women are more likely to identify as LGBT than men with 3.6% vs. 3.3%.
Younger Americans are also more likely to identify as LGBT.
You can read all the results of this survey here: Special Report: 3.4% of U.S. Adults Identify as LGBT
As concluded the report, this initial analysis reveals new insights into the composition of the LGBT community in the U.S. In particular, the findings challenge both media and cultural stereotypes to reveal that the LGBT population is in a number of ways not that different from the broader U.S. population.