The incident, which occurred at approximately 9.30pm, is believed to have taken place near the Glen Rovers Hurling Club.
The woman in her late twenties was approached by a group of males, all believed to be teenagers and assaulted.
She was taken to Cork University Hospital with facial injuries.
No arrests have been made and investigations are ongoing.
Anyone with information can contact Mayfield Garda Station on 021-4558510.