Tavaras Smith, a deputy with the department for one year, was charged after deputies were summoned to his residence on gum log road around 11:00 p.m. Tuesday.
His girlfriend claimed she was assaulted by Smith.
"When deputies arrived, they saw enough evidence to arrest him," said Sheriff Billy Sollie. "He has been charged with domestic violence and simple assault."
Smith has been released on a $250 bond. He's suspended without pay, pending the investigation of the incident.