Magic Number of the Day: 80.7

Photograph by Mario Tama/Getty Images

The Positive Brothers performs in New York City.

That’s the share of the U.S. population that lived in urban areas in 2010, the Census Bureau said yesterday. It’s up from 79 percent in 2000.

The Census Bureau says that urban areas “represent densely developed territory, and encompass residential, commercial, and other non-residential urban land uses.” It divides the urban population into “urbanized areas,” which have 50,000 or more people, and “urban clusters,” which have between 2,500 and 50,000 people.

The Census Bureau classifies the rest of the population as rural — 19.3 percent in 2010, down from 21 percent in 2000.

It said that California was the most urban state in 2010, with 95 percent of its population residing within urban areas. New Jersey was second, at 94.7 percent. The most populous urban area is the New York-Newark area, with more than 18.3 million residents.

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