| Business | Phone |
| Employment Training Dept 930 6th St # 2nd, Eureka 95501 | (707) 441-4600 |
| Humboldt Agricultural Comm 5630 S Broadway St, Eureka 95503 | (707) 445-7223 |
| Humboldt Birth Certificates 825 5th St # 5, Eureka 95501 | (707) 445-7382 |
| Humboldt Building Inspection 3015 H St # 2, Eureka 95501 | (707) 445-7245 |
| Humboldt Cnty Equipment Mntnc 3130 Jacobs Ave, Eureka 95501 | (707) 445-7575 |
| Humboldt Cnty Registrar-Voter 3033 H St, Eureka 95501 | (707) 445-7678 |
| Humboldt County Chdp Adm 317 2nd St, Eureka 95501 | (707) 445-6210 |
| Humboldt County Coroner 3012 I St, Eureka 95501 | (707) 445-7242 |
| Humboldt County Engineering 1106 2nd St, Eureka 95501 | (707) 445-7493 |
| Humboldt County Planning Dept 3015 H St, Eureka 95501 | (707) 445-7541 |
| Humboldt County Recycling Info 100 H St # 100, Eureka 95501 | (707) 441-2005 |
| Humboldt Data Processing Center 839 4th St, Eureka 95501 | (707) 445-7556 |
| Humboldt Election Div 3033 H St # 20, Eureka 95501 | (707) 445-7481 |
| Humboldt Local Agcy Formation 3015 H St # 1, Eureka 95501 | (707) 445-7508 |
| Humboldt Road Commissioner 1106 2nd St, Eureka 95501 | (707) 445-7421 |
| North Coast Unified Air Qulty 2300 Myrtle Ave, Eureka 95501 | (707) 443-3093 |
| University Of Calif Coop Ext 5630 S Broadway St, Eureka 95503 | (707) 445-7351 |
| Contract Inspection 1106 2nd St, Eureka 95501 | (707) 445-7448 |
| Engineering-Design Section 1106 2nd St, Eureka 95501 | (707) 445-7377 |
| Humboldt Alternate Conflict 1001 4th St, Eureka 95501 | (707) 476-1255 |
| Humboldt Cnty Conflict Counsel 931 3rd St, Eureka 95501 | (707) 445-7475 |
| Humboldt Cnty Motor Pool Svc 209 J St, Eureka 95501 | (707) 445-7374 |
| Humboldt Cnty Natural Resource 1106 2nd St, Eureka 95501 | (707) 445-7741 |
| Humboldt County Human Rights Eureka 95501 | (707) 268-2548 |
| Humboldt County Materials Lab 931 2nd St, Eureka 95501 | (707) 445-7428 |
| Humboldt County Risk Mgmt 825 5th St, Eureka 95501 | (707) 268-2544 |