No. 15: Brookville, N.Y.

New York MSA: Nassau County
Median home sale price: $1,786,224
Price change YOY: -3.9%
Population: 2,689
Median household income: $200,000+

Brookville is the site of a famous estate that was sold to Long Island University in 1951. It once belonged to Marjorie Merriweather Post, daughter of the General Foods founder and during her lifetime one of the wealthiest women in the world.

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