Top-earning towns

Named for the river it borders, Potomac is located just minutes from downtown Washington, D.C., but its pastoral vistas and large estates feel miles away from the hustle and bustle of the nation's capital.

Picturesque enclaves of multimillion-dollar homes and exclusive golf and riding clubs give diplomats, government contractors and executives private retreat. Cosmopolitan residents enjoy the quaint feel of the town's annual Potomac Day celebration, weekly farmer's market and boutique retailers.

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