The incident happened in the early hours of Saturday morning.
A man working at Electric Picnic has been charged with assault following this year's festival.
The Irish Daily Star is reporting the incident took place at the Stradbally grounds in the early hours of Saturday morning and left a festival goer with a broken jaw and serious cut to their eye.
A man in his late teens has been arrested, charged, and has appeared before Tullamore District Court.
This year's event saw over 80,000 people attend, with around 4,000 booked to work the three day festival.
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