DAs reaching hire and hire

New York’s district attorneys have gone on a hiring spree in the past decade.

The DAs in the five boroughs and the special narcotics prosecutor beefed up their staffs by nearly a third, even as arrests dropped by 45 percent, the city’s Independent Budget Office found.

This fiscal year, the city budgeted $456 million for the six prosecutor offices.

Today, the DAs have nearly 4,700 employees, compared with roughly 3,600 in 2010 — and triple the number back in 1980.

Manhattan DA Cy Vance Jr. has 1,551 staffers, 306 more than when he came into office a decade ago.

Vance’s office attributed the higher headcount to equal-justice initiatives, investigations of complex crimes, and expenses related to meeting the state’s new discovery requirements, which force prosecutors to turn over evidence to defendants within 15 days.

“We are thankful for the funding that helps us excel as a 21st century prosecutor’s office,” spokeswoman Emily Tuttle told The Post.

The Staten Island DA’s Office had the biggest percentage jump, 145 percent, from 82 to 201. And roughly 90 percent of the hires have been added since 2016, when Democrat Mike McMahon took the reins.

McMahon used his staffers to create the domesticviolence bureau, for instance — as well as diversion programs and anti-drug initiatives to fight the opioid epidemic, a spokesman said.

The Queens DA’s Office grew from 509 to 722, The Bronx’s jumped from 680 to 1,000, the Brooklyn office grew from 893 to 1,054, and a Special Narcotics Prosecutor’s Office spokeswoman put its increase at 209 to 213.