About two dozen inmates were also pepper-sprayed as the facility went on lockdown and deputies worked to contain the melee.
The incident started just after 3 p.m. when deputies were conducting security checks at the facility's dorms, according to the Los Angeles County Sheriff's Department.
One inmate allegedly attacked a deputy and then other inmates joined in, the department said.
Additional deputies showed up to try to stop the attack and contain the incident. About 20 to 25 inmates were hit with pepper spray as deputies tried to control them.
Seven deputies and a custody assistant were injured. The assistant and six of those deputies were brought to a local hospital for treatment of injuries that were not considered life-threatening.
Two inmates were also injured and were brought to a local hospital for treatment.
The jail remained on lockdown for several hours after the riot.