Brookville, N.Y.

Brookville, N.Y.

Overall rank: 1
Households: 848
Average income: $328,404
Average net worth: $1,670,075
Change in income since 2000: +7%
Income rank: 7
Net worth rank: 4

Brookville is a highly affluent village in Nassau County on Long Island's North Shore, the area where F. Scott Fitzgerald set his novel The Great Gatsby. The village, about 25 miles from midtown Manhattan, is home to Jennifer Lopez and husband Marc Anthony, and other millionaires who enjoy their privacy. You're unlikely to see anybody outside their mansion or country club. The village has no commercial development, no public parking, and few sidewalks.