A man was found dead on the Upper West Side Friday morning, hanging from a Central Park overpass with a plastic bag around his head, police and park workers said.

The 45-year-old man was found dangling by an orange cord from the Winterdale Arch near Central Park West and West 82nd Street around 5:50 a.m. by a passerby who discovered his body and called 911, said cops and a park worker.

“He hung himself. Right off the railing at the edge of the arch,” the parks worker said.

“I saw a long orange cord. He had tied a plastic bag around his head, too… It was awful to see. I’m about ready to go home.”

The man, whose name has not been released pending family notification, left behind a suicide note, police sources said.

Additional reporting by Stephanie Pagones