What county are your charges in?
You must file for expungement petition in the county in which you were convicted in. There are 58 counties in California and each county has its own Superior Court.

Listed below are the surrounding Northern California Superior Courts.
Superior Court of California
County of Sierra
100 Courthouse Square
Downieville, CA 95936
(530) 289-3698


Superior Court of California
County of Shasta
1500 Court Street Room 219
Redding, CA 96001
(530) 245-6789


Superior Court of California
County of Sutter
446 Second Street
Yuba City, CA 95991
(530) 822-3306


Superior Court of California
County of Tehema
633 Washington Street
Red Bluff, CA 96080
(530) 527-3563

Superior Court of California
County of Yuba
215 Fifth Street Suite 200
Marysville, CA 95901
(530) 749-7600

Superior Court of California
County of Yolo
725 Court Street
Woodland, CA 95695
(530) 406-6700
Superior Court of California
County of Butte
One Court Street
Oroville, CA 95965
(530) 538-7551

Superior Court of California
County of Colusa
532 Oak Street
Colusa, CA 95932
(530) 458-5149


Superior Court of California
County of Glenn
Willows Branch - Main Conference
Willows, CA 95988
(530) 934-6646


Superior Court of California
County of Lassen
220 South Lassen Street Suite 2
Susanville, CA 96130
(530) 251-8205


Superior Court of California
County of Nevada
201 Church Street
Nevada City, CA 95959
(530) 265-1311


Superior Court of California
County of Plumas
520 Main Street Room 104
Quincy, CA 95971
(530) 283-6232