Old Greenwich ranked No. 6 with an average household income in 2015 of $341,401. Darien ranked No. 9 with an average household income of $313,277.
Westport ranked No. 22 at $270,222 and Riverside ranked No. 45 at $239,571.
Atherton, Calif., in the county of San Mateo, ranked No. 1 in the nation with an average household income of $444,374. Scarsdale in Westchester County in New York ranked No. 3, while Bronxville, another Westchester County community, ranked No. 9.
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