Gardai said 22 people were arrested for public order offences during Saturday night's Eminem concert at Slane.
There were a further 35 arrests for minor drug offences, five reported assaults and one person was detained for driving while under the influence.
Superintendent Michael Devine said most of the 80,000 fans at the gig were well behaved.
A huge security operation was put in place after nine people were injured during violence at a concert at Pheonix Park last year.
Around 750 Garda officers were on duty with an additional 500 local stewards on the ground to ensure public safety. Revellers were also searched at three different entry points with officers looking out for alcohol, drugs and weapons.
Music promoter MCD has praised the concert-goers who attended the Eminem event for their behaviour.