| Business | Phone |
| Lake County Assessor 255 N Forbes St # 223, Lakeport 95453 | (707) 263-2302 |
| Lake County Auditor 255 N Forbes St # 209, Lakeport 95453 | (707) 263-2311 |
| Lake County Tax Collector 255 N Forbes St # 215, Lakeport 95453 | (707) 263-2234 |
| Lake County Treasurer 255 N Forbes St # 215, Lakeport 95453 | (707) 263-2236 |