In a poll last year from YouGov, 27% of American adults believed in astrology, including 37% of adults under 30.
Atheists (10%) are the least likely to believe in it, Catholics (31%) most likely https://today.yougov.com/topics/entertainment/articles-reports/2022/04/26/one-four-americans-say-they-believe-astrology
One in four Americans say they believe in astrology | YouGov
YouGov’s latest poll finds that a little more than one-quarter of Americans (27%) – including 37% of adults under 30 – say that they believe in astrology, or that the position of the stars and planets influences people’s lives. About half of Americans (51%) say they don't believe in astrology and 22% are unsure.