The Catalina Courthouse or the Los Angeles Superior Court in Avalon California is located at 215 Sumner Avenue, Avalon, CA 90704. The freeway access is poor but there is zero traffic getting to this courthouse! Parking is not a problem, especially if you are in a golf cart. This courthouse has a grand total of one courtroom. According to the county’s website they have departments for traffic, criminal, civil matters, small claims, and an informal juvenile court.