The suburbs, which in 2000 accounted for 29 percent of the region’s poor people, a decade later were home to 33 percent of metropolitan New Yorkers living below the federal poverty level, according to an analysis of the latest census results.

The analysis, released on Monday by the Metropolitan Policy Program of the Brookings Institution, also found that while the number of poor people in New York City and Newark declined by 7 percent, or 120,000, the number in the suburbs rose by 14 percent, or 100,000, from 2000 to the census’s rolling 2008-10 American Community Survey.

The poor have typically been concentrated in big cities and rural America. Increasing poverty in the New York metropolitan area’s historically affluent suburbs mirrored a national trend detailed in the analysis, “Confronting Suburban Poverty in America” by Elizabeth Kneebone, a fellow at the Metropolitan Policy Program, and Alan Berube, a deputy director of the program.

The first decade of the 21st century was a tipping point, the authors wrote. Suburbia, they said, is now home to the “fastest-growing poor population in the country.”