California, New York: See the wealthiest towns in America

The Silicon Valley town (in California) that billionaires Eric Schmidt of Google and Facebook’s Sheryl Sandberg have called home is America’s richest community for the third year in a row, according to the Bloomberg Richest Places annual index.

Scarsdale, New York, north of Manhattan, moved up to the No. 2 spot on this year’s list as its residents enjoyed a $30,000 increase, on average, in annual household income from the prior year.

More than half the top 100 richest places in America were either in the New York City area or California. A handful of Midwest and Southwest areas made the top 20.

Highland Park, Illinois, the 100th town on the list, boasted $209,000 in average household annual income. Last year, No. 100 had $198,000.

Four places made their top 100 debut, including two in California: Tamalpais-Homestead Valley in Marin County and beach community Del Mar. Jericho, on New York’s Long Island, and Medina, Minnesota, were also first-timers.

According to the report, wealth is concentrated in six counties: Westchester in New York, Bergen in New Jersey and Fairfield in Connecticut, all outside New York City; Cook County of Chicago; Los Angeles County, and Montgomery County, Maryland, bordering Washington D.C.