Jupiter,Florida, population 55-60,000....located in Palm Beach County.....higher than national average individual and family incomes....famous people who have lived or are currently living in Jupiter include Michael Jordan, Bill Parcells, Bryant Gumbel, Mike Schmidt (baseball Hall of Fame), Burt Reynolds and many more of sports and entertainment elites.
Leni
I've lived in Jupiter for nearly 30 years now. Abacoa (where the little one died) is a development/downtown where the Marlins and Cardinals both train in the spring.
Most of Jupiter Island - where the really rich live - is technically Hobe Sound (Martin, not Palm Beach County).
As far as famous people - yeah there are a lot. I think it's easier to name PGA Tour members that live in Jupiter than ones who don't live in Jupiter.
Jupiter is also about the best beach on the east coast: