Towns include: Aspen Hill,
Bethesda,
Calverton,
Colesville,
Fairland,
Gaithersburg,
Germantown,
Montgomery Village,
North Bethesda,
North Potomac,
Olney,
Potomac,
Rockville,
Silver Spring,
Wheaton-Glenmont,
White OakLife expectancy at birth: 81.31 years
Two top-ranked hospitals (Suburban and Naval, both in Bethesda) help make affluent, educated Montgomery County No. 1 for longevity.
Bethesda's downtown is compact, walkable, and connected to central Washington, D.C. by Metro. Outside of town, Chesapeake and Ohio Canal National Park's scenic canalside trail helps keep residents in shape.
Last year, Montgomery's county seat of Rockville unveiled a new pedestrian-friendly town center, bringing together housing, jobs, shopping, and recreation.
By Matthew Amster-Burton
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