RSPCA inspector Thomas Hutton said: “Police, along with the Highways Agency and local fire and rescue service, had already got the cat down when I arrived.
“The male black and white ragdoll cat had been hanged using a piece of blue twine.
“He was scanned for a microchip and his owner was informed.”
The six-month-old cat, called Hugo, was first spotted by a member of the public at 10.15am hanging from the bridge on the M62 westbound just before junction 33 at Ferrybridge.
Owner Lorna Taylor said: “I last saw him on Saturday night. I was pulling sticky buds out of his fur.
“I had only had him for a short time but it’s absolutely devastating to think about what has happened to him.
“He was a very bold cat and he would have fought his corner. Whoever did this must be covered in scratches.”
It’s thought the incident must have happened some time between about 9pm on Saturday and 10.15am on Sunday.
If anyone saw anything, or has any specific information, please call the RSPCA appeal line on 0300 123 8018 and ask to leave a message for Inspector Hutton.