Police located Dallas in the hotel where he was arrested and charged with second-degree assault with intent to cause bodily injury.
He was held in the local county jail until he posted AUD $7,100 bail.
Dallas publicly responded to his arrest, taking to Twitter and Instagram to message his collective 38 million followers this morning.
His first message was a warning to everyone to "be safe tonight", presumably referring to New Year's Eve revelry.
The star's second message directly responded to his arrest, displaying his mugshot and defending himself against the allegations by claiming he was simply protecting the people he cared about.
It is not known what altercation took place before the man was allegedly assaulted.
Dallas has amassed millions of social media followers, between Instagram, Twitter, Vine and YouTube.
His career is built on a similar platform to Paris Hilton and Kim Kardashian: living life on camera, solely for others' viewing pleasure.
Dallas made a name for himself by posting vines of the pranks he played on his family and friends.
He then moved from Vine to Twitter, Instagram and YouTube, where he would interact with fans, answer questions and perform dares.
He starred in a Netflix reality show called Chasing Cameron. and has recently been pursuing a career in music.
