At least 31 inmates have tested positive for the virus. Two of them are showing symptoms.
Officials say the remaining inmates have no symptoms but have been placed in isolation per the sheriff's office guidelines.
The sheriff's office says the outbreak was discovered after a 50-year-old inmate reported he felt sick following an appearance at the Visalia Superior Court last Friday.
The man was fully vaccinated but did test positive for COVID-19.
Authorities say they will continue to follow COVID-19 safety protocols at the facility to help limit the spread.