Everyone knows the Port Authority is a mammoth, money-sucking agency. But a new listing of some PA salaries gives a taste of where that money goes.

As The Empire Center reports, 10 members of the PA Police Department got paid more than $300,000 last year. Top earner Lt. Nicholas Yum took in $402,812.

Twelve PA cops pulled in more than the $289,667 salary of PA Executive Director Pat Foye.

The center says it’s not clear if these salaries include back pay awarded in an old lawsuit.

But it’s no secret the PA’s 1,900 cops are paid better than most other local officers. PAPD pay totals near $400 million a year — just one reason for the agency’s vast $8 billion-a-year bottom line.

Let’s be clear: No one appreciates the job cops do more than The Post. Nor should anyone forget the sacrifice of the 37 Port Authority officers who died on 9/11.

Yet the issue here isn’t just pay; it’s why the PA has its own police force in the first place.

When news broke that the Port Authority shut lanes at the George Washington Bridge for political reasons in 2013, we urged reform. The agency’s grown far out of control.

Along with overseeing airports, bridges, tunnels and the like, for example, it went into the real-estate business, including ownership of the World Trade Center site.

For all the reforms proposed since 2013, nothing will do more to improve the PA’s performance than slimming it down.

That means shedding real-estate: Selling One World Trade would be a fine start. But it’s past time to trim anything that doesn’t directly contribute to the PA’s core mission: transportation.

New Jersey and New York can work out an arrangement — by, say, having their state police forces create “Port Authority” units — to replace the PA force.

With cops doing cop work under the direction of . . . cops, the PA could concentrate on keeping its bridge lanes open.

© 2015 New York Post