| Business | Phone |
| County Juvenile Court 8303 Haven Ave, Rancho Cucamonga 91730 | (909) 945-6000 |
| Court-Felony Unit 8303 Haven Ave, Rancho Cucamonga 91730 | (909) 945-4129 |
| Probate Court 8303 Haven Ave, Rancho Cucamonga 91730 | (909) 945-4134 |
| San Bernardino County Court 8303 Haven Ave, Rancho Cucamonga 91730 | (909) 945-4124 |