YouGov America released a survey of 20,810 American adults. Highlights below. Note that I didn't run any statistical tests, so any claims of group differences are just "eyeballed."
- 46% say that they are "very concerned" or "somewhat concerned" about the possibility that AI will cause the end of the human race on Earth (with 23% "not very concerned, 17% not concerned at all, and 13% not sure).
- There do not seem to be meaningful differences by region, gender, or political party.
- Younger people seem more concerned than older people.
- Black individuals appear to be somewhat more concerned than people who identified as White, Hispanic, or Other.
Furthermore, 69% of Americans appear to support a six-month pause in "some kinds of AI development". Note that there doesn't seem to be a clear effect of age or race for this question. (Particularly if you lump "strongly support" and "somewhat support" into the same bucket). Note also that the question mentions that 1000 tech leaders signed an open letter calling for a pause and cites their concern over "profound risks to society and humanity", which may have influenced participants' responses.
In my quick skim, I haven't been able to find details about the survey's methodology (see here for info about YouGov's general methodology) or the credibility of YouGov (EDIT: Several people I trust have told me that YouGov is credible, well-respected, and widely quoted for US polls).
See also:
IPSOS conducted a survey recently about concerns in the US population in general. 71% of respondents answered that they were concerned about "The impact of AI (Artificial Intelligence) on jobs and society" but other areas that seem to be less pressing from an EA perspective scored higher. For example:
What is more, respondents seem to be taking the impact of AI rather lightly compared to other concerns: AI "only" gets 28% of respondents very concerned, which is lower than other issues, which get around 40% of people very concerned. The survey also asked a very similar question to the one YouGov asked: "Do you support or oppose the following policies? The government temporarily banning the use of AI systems in the United States until they are better understood". The results are very different, but that might be due to phrasing. Only 44% of respondents support the temporary ban. I think that the YouGov survey might be overestimating the number and degree of concern about AI.

You can find the full survey here.