A search has been launched for a 12-year-old girl who went missing from her home on NSW’s south coast.

Emily Cook left her home in Worrigee, near Nowra, about 3.30pm (AEST) on Friday and was last seen walking north along Arthur Street.

Police say she has not been seen or heard from since, and there are concerns for her welfare because of her age.

Emily is described as being of Caucasian appearance, about 170cm tall, thin, with long blonde hair.

She was last seen wearing a black top and coloured shorts.