Audrey Carey

San Francisco police said Quebecer Audrey Carey died after suffering a blunt force trauma to her head. (San Francisco Police Department)

Police in San Francisco are investigating after a Quebec woman was found dead in a park in the city.

Local media reported a passerby found 23-year-old Audrey Carey's body on Saturday in Golden Gate Park. 

San Francisco police spokesperson Albie Esparza said she suffered a blunt force trauma to her head.

"When officers and paramedics arrived, they located the victim, who was pronounced dead at the scene," Esparza said.

"Our medical examiner responded and classified this as a homicide because of the trauma to the body. It is a tragedy and our job is to find out exactly what happened."

Golden Gate Park

Local media report Audrey Carey was found dead in San Francisco's Golden Gate Park. (Golden Gate Park)

Carey is from St-Jean-sur-Richelieu, about 50 kilometres southeast of Montreal. 

St-Jean-sur-Richelieu police say they have notified the woman's family.

Carey was attending a bluegrass festival in the city, according to reports.