Rich New Yorkers aren’t filling out the census. Poor New Yorkers may suffer.

When city officials took on the herculean task of getting every New York City household to fill out the census, an eat-your-vegetables exercise that provides millions in federal aid to low-income residents, they didn’t expect the Upper East Side to pose much of a problem.

But the coronavirus has upended census-takers’ best-laid plans. And that may have serious financial implications for the city.

Only 46 percent of Upper East Side households have filled out their census forms, according to a June 25 report circulated by the Department of City Planning’s chief demographer, Joseph J. Salvo — well below the neighborhood’s final response rate in 2010, and short of the current citywide rate of almost 53 percent.

The reason?

“They’re not here,” said Liz Krueger, a Democratic state senator, referring to her constituents in Midtown and the Upper East Side. “No one’s here.”