The cat's owner, Lee Palmer, says the family was forced to call 911 after the feline scratched their seven-month-old baby, prompting Mr Palmer to kick the animal up the backside.
He says this caused the cat to go "over the edge".
A 911 audio recording captured Mr Palmer telling an emergency services dispatcher in Portland his family were trapped by the hostile cat.
"We're trapped in the bedroom - he won't let us out of our door," Mr Palmer said.
Listen to the 911 call from the trapped family
"I kicked the cat in the rear and it has gone over the edge ... He's very, very, very, very hostile."
The cat made no comment...