26. Greenville, New York (Average Household Income: $297,128)

An inner suburb of New York City, Greenville is commonly known by the locals as Edgemont. Most of its residents refer to the area as Edgemont, which is also the name of its accompanying school district.

It was originally a development of summer homes for wealthy families, designed by a variety of different architects. Greenville is now known for its stunning antique colonial homes and outstanding schools.