| Business | Phone |
| Agricultural Commissioner 175 Russell Ave, Susanville 96130 | (530) 251-8110 |
| County Counsel 221 S Roop St # 2, Susanville 96130 | (530) 251-8334 |
| Lassen County Adult Detention 1405 Sheriff Cady Ln, Susanville 96130 | (530) 251-5245 |
| Lassen County Alcohol & Drug 476 Alexander Ave, Susanville 96130 | (530) 251-8112 |
| Lassen County Bldg & Grounds 707 Nevada St # 4, Susanville 96130 | (530) 251-8299 |
| Lassen County Cal Works 2545 Main St, Susanville 96130 | (530) 251-8200 |
| Lassen County Cooperative Ext 707 Nevada St # 2, Susanville 96130 | (530) 257-6363 |
| Lassen County Coroner 220 S Lassen St # 1, Susanville 96130 | (530) 257-6121 |
| Lassen County Juv Hall 107 S Roop St, Susanville 96130 | (530) 251-0626 |
| Lassen County Personnel Dept 221 S Roop St # 3, Susanville 96130 | (530) 251-8320 |
| Lassen County Road Div 707 Nevada St # 4, Susanville 96130 | (530) 251-8288 |
| Local Reuse Authority 707 Nevada St # 5, Susanville 96130 | (530) 251-8309 |
| Diamond Crest Cemetery Susanville 96130 | (530) 257-7843 |
| Lassen Cnty Environment Health 1445 Paul Bunyan Rd # B, Susanville 96130 | (530) 251-8528 |
| Lassen Cnty Juvenile Detention 1415 Chestnut St, Susanville 96130 | (530) 251-8324 |
| Lassen County Animal Control 707 Nevada St, Susanville 96130 | (530) 257-0488 |
| Lassen County Animal Shelter 472-000 Johnstonville Rd N, Susanville 96130 | (530) 257-9200 |
| Lassen County Bldg Inspector 707 Nevada St, Susanville 96130 | (530) 257-8330 |
| Lassen County Building Div 707 Nevada St # 5, Susanville 96130 | (530) 251-8137 |
| Lassen County Co-Op Ext 4-H 707 Nevada St # 2, Susanville 96130 | (530) 251-8285 |
| Lassen County Co-Op Ext Lvstck 707 Nevada St # 2, Susanville 96130 | (530) 251-8133 |
| Lassen County Co-Op Ext Plant Susanville 96130 | (530) 251-8132 |
| Lassen County Fair 195 Russell Ave, Susanville 96130 | (530) 257-4104 |
| Lassen County Mgmt & Budget Susanville 96130 | (530) 251-8330 |
| Lassen County Printing Office 707 Nevada St, Susanville 96130 | (530) 251-8329 |
| Lassen County Public Guardian 720 Richmond Rd # A, Susanville 96130 | (530) 251-8337 |
| Lassen County Recovery & Reimb 220 S Lassen St # 7, Susanville 96130 | (530) 251-8227 |
| Lassen County Surveyor 707 Nevada St, Susanville 96130 | (530) 251-8261 |
| Lassen County Victim Witness 900 Main St, Susanville 96130 | (530) 251-8281 |
| Lassen Cty Narcotic Task Force 170 Russell Ave, Susanville 96130 | (530) 257-7126 |