The Take That star, whose actress wife Ayda Field is pregnant with their first child, said they will leave for England as soon as the kid is old enough for school, reported Sun online.
"I don't want to educate our baby in LA because I would much prefer her to have English sensibilities.
"They are idiots in LA schools. They are a breed of idiots that only exist in Los Angeles and she would be surrounded by them. It's not like one or two either. It's not like the Big Brother house, where you pick the worst ones," said Williams.
The 38-year-old English singer is ready to give up the US for good to ensure his child gets the right upbringing.
"I think kids there have a massive sense of entitlement, are dull and dumb. It means me coming back to the UK for good but I can live with that. It's worth being pestered for her to have a good school," he said.