Many live along the Main Line, the towns along the old main line of the Pennsylvania Railroad. They extend pretty much along modern day Lancaster Ave from Paoli to the Philly city line.Also, in the area along the Pennsylvania-Delaware state line between Kennett Square and Route 202. This is where most of the Dupont family lives.EDIT: Steve, you need to reread the question it says the Philadelphia area not just Philadelphia.
Seems like most here dont know Philly, she asked where IN PHILLY do the wealthy live..so the burbs dont count ,NJ and NY dont count...So, the answer is Chesnuthill, Queen Village. Soceity Hill, Rittenhouse Square, The Art Museum area Fitler Square and The Graduate hosp area..all are loaded with million dollar mansions and townhouses...
The Main Line and a lot of them have property in the city and neighboring shore lines
The Main Line
It s not just in the philadelphia area. I m from NJ and grew up in a town that was mostly known for it s celebrity residents such as Al Roker, Bon Jovi and various members of the Bon jovi group, Bruce Springstein, Queen Latifah, members of the Sopranos cast, etc.Unfortunately the most famous resident where I live now is Elizabeth Smart and that s only because she was kidnapped by psychos.As for why Philadelphia specifically? Who knows.. maybe because it s close to NY without actually being IN new york city.