Officers from Staffordshire Police were called at 7.30pm on Sunday to a wooded area off Pool Lane, at the junction of Watling Street in Brownhills.
The girl sustained several injuries, including a fractured collar bone.
She has since been discharged from hospital and continues to recover from her injuries.
Police believe the assault took place at around 6pm and are particularly keen to speak to a white male, aged between 27 to 28, about 5ft 4 inches tall and of a stocky build.
He is described as having his hair gelled to one side and was wearing a grey tracksuit top, with a white line across the centre, believed to be of the McKenzie brand, with grey Puma trainers.
Police are currently increasing visible patrols in the area to reassure local residents.
Officers would like to speak to anyone who saw the male or who may have any CCTV or dashcam footage of the area at the time.
Anyone with information should contact Staffordshire Police on Facebook, Twitter, or call 101, quoting incident number 611 of August 7.
Alternatively, contact Crimestoppers anonymously on 0800 555 111.