Bennell was one of several people arrested when fighting broke out in the nightclub district in Mandurah, south of Perth.
He was taken to Mandurah police station and released on bail in the morning.
The Suns have confirmed Bennell was charged and arrested. He will face court in two weeks.
Bennell was a junior footballer in Western Australia before being drafted by the Suns in 2010 with their No.2 pick.
He finished runner-up in the club's best and fairest last year, second to only champion Gary Ablett.
The Suns said in a statement: "As this is a police matter the club is not in a position to make further comment."
