This Gallup survey looks like is getting about double the estimates from the Australian Bureau of Statistics (based on combining the samples of a number of large population surveys to get a big enough sample of queer respondents).based on (and linked to in the article)![]()
Nearly 1 in 10 U.S. adults identify as LGBTQ, Gallup survey finds
The percentage of U.S. adults who identify as LGBTQ or something other than heterosexual increased to 9.3%, from 7.6% in 2023.www.nbcnews.com
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LGBTQ+ Identification in U.S. Rises to 9.3%
LGBTQ+ identification among U.S. adults has increased to 9.3%.news.gallup.com
Notably (from the NBC story, as it doesn't show in the Gallup blurb and I presume it's in the pay-for actual Gallup survey results):
So presumably the overall percentage will eventually level out above 4%.

Estimates and characteristics of LGBTI+ populations in Australia, 2022
Data on gender, trans and gender diverse, sexual orientation, and people born with variations of sex characteristics

A big part of the difference seems to be a lot more people reporting bisexuality in Gallup in the US than on ABS social surveys. Gallup has about 2x as many bi respondents vs the ABS getting roughly the same number bi as gay.
Age profiles are pretty similar. For trans and gender diverse people, the youngest age group is coming in at about 2% and tailing off from there to be about 1% of the total population.