The incident happened around 5:40 p.m. Sunday near Pacific Coast Highway and Encinal Canyon Road, according to the Los Angeles County Sheriff's Department.
The girl was reportedly feeding chickens when she was attacked by the animal and bitten on her arm. Family members took her to the hospital with non-life threatening injuries.
After the attack, the California Department of Fish and Wildlife found a mountain lion and euthanized it. DNA tests will confirm if it's the same mountain lion that attacked the girl.
This comes after a 6-year-old boy was attacked by a coyote at his sister's softball game in Carson, California.
The coyote bit the back of the boy's head and both of his legs, requiring the child to have 20 stitches.