MINEOLA, N.Y. — A Long Island government official wants to close a projected $310 million budget shortfall by cutting more than 1,000 jobs from the Nassau County work force.

County Executive Edward Mangano says if he doesn’t cut the payroll, county property taxes could rise by 39 percent. Nassau property taxes are already among the highest in the country.

The county, just east of New York City, has been struggling for a number of years to trim growing deficits. Earlier this year, a state fiscal watchdog created a decade ago by the state legislature took control of overseeing Nassau’s finances. That agency, the Nassau Interim Finance Authority, did not immediately comment.

Mangano’s plan would leave 7,400 employees on the payroll. He also wants employees to start paying 25 percent of their health insurance.