NSW Police confirmed a Queensland 30-year-old man had been charged with assault with an act of indecency and granted conditional bail.
Bolton will appear in Waverley Local Court on June 19.
The NRL confirmed the integrity unit had been made aware of the alleged incident.
The Cowboys have stayed on in Sydney following Friday’s win over Penrith in Bathurst ahead of Thursday’s clash with the Wests Tigers at Leichhardt Oval.
Police were called to a Campbell Parade bar late on Saturday night where a female patron claimed she’d been indecently assaulted.
The Cowboys have been approached for comment.