A 21-year-old woman has resisted arrest and attempted to flee police following a beach party at Byron Bay overnight.

The woman allegedly bit an officer on the hand and while being escorted to Byron Bay police station wrapped her legs around a female senior constable, causing both to fall to the ground.

Methylamphetamine was also allegedly found in her possession.

Police charged the woman with assault officer in execution of duty, resist officer in execution of duty, and possess prohibited drug.

She was also issued a $3000 infringement notice for not complying with health orders.

The 21-year-old was granted bail and will appear at Byron Bay Local Court on Monday.

Police initially received reports of a party with loud music in the sand dunes behind Belongil Beach.

Around 25 people fled into nearby bushland when officers arrived.

Three others were each issued $3000 fines for not complying with the health orders.

Police are still investigating.