Some 100,000 students, or nine percent of city public school pupils, were homeless during the academic year 2015-16 -- an increase of 20 percent in just one year, said the Institute for Children, Poverty and Homelessness.
New York -- a city of huge wealth disparity and America's most populous city as well as its financial and entertainment capital -- has long suffered from a homeless crisis.
While the city has more billionaires than any other in the world, its unrelenting pursuit of wealth and gentrification means that those on modest wages struggle to find affordable housing.
More than 140,000 children in city public schools have been homeless at some point in the last six years, the Institute said.
If current trends continue, more than one in seven of all elementary school students will experience homelessness, said Anna Shaw-Amoah, principal policy analyst at the Institute.
"Many people may have that perception," she said when asked about New York's wealthy international image. "But in every school district there is at least two percent of the students who are homeless."
Being homeless has an adverse effect on school performance, even if children are subsequently moved into shelters or permanent housing, the report found.
Students in shelters lagged behind classmates academically and one in four homeless students without middle-school proficiency dropped out of high school.
In four districts in the Bronx and Brooklyn, less than 46 percent of homeless students graduated -- significantly trailing the citywide average of 73 percent.
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