| Business | Phone |
| Colusa Cnty Jury Commissioner 532 Oak St, Colusa 95932 | (530) 458-0431 |
| Colusa County Adm & Fiscal 929 Bridge St, Colusa 95932 | (530) 458-0209 |
| Colusa County Agriculture Burn 100 Sunrise Blvd # S, Colusa 95932 | (530) 458-0581 |
| Colusa County Animal Control 927 Bridge St, Colusa 95932 | (530) 458-0229 |
| Colusa County Behavioral Hlth 648 5th St, Colusa 95932 | (530) 458-0519 |
| Colusa County Building Inspctr 220 12th St, Colusa 95932 | (530) 458-0480 |
| Colusa County Central Svc 547 Market St # 110, Colusa 95932 | (530) 458-0437 |
| Colusa County Children & Adult 251 E Webster St, Colusa 95932 | (530) 458-0280 |
| Colusa County Collector's Office 546 Jay St, Colusa 95932 | (530) 458-0447 |
| Colusa County Collector's Office 547 Market St # 102, Colusa 95932 | (530) 458-0447 |
| Colusa County Coroner 929 Bridge St, Colusa 95932 | (530) 458-0207 |
| Colusa County Counsel 1213 Market St, Colusa 95932 | (530) 458-8227 |
| Colusa County Drug Task Force 929 Bridge St, Colusa 95932 | (530) 458-0222 |
| Colusa County Farm Home & 4-H 100 Sunrise Blvd # E, Colusa 95932 | (530) 458-0570 |
| Colusa County Maintenance 133 Market St, Colusa 95932 | (530) 458-0495 |
| Colusa County Personnel 547 Market St # 104, Colusa 95932 | (530) 458-0420 |
| Colusa County Registrar-Voters 546 Jay St, Colusa 95932 | (530) 458-0500 |
| Colusa County Superior Ct Jdg 532 Oak St # C, Colusa 95932 | (530) 458-0430 |
| Colusa County Tobacco Ed Prog 251 E Webster St, Colusa 95932 | (530) 458-0488 |
| Colusa County Tobacco Ed Prog 827 Bridge St, Colusa 95932 | (530) 458-0488 |
| Colusa County Veteran's Svc 606 9th St, Colusa 95932 | (530) 458-0494 |
| Colusa County Veteran's Svc 901 Parkhill St, Colusa 95932 | (530) 458-0494 |
| Colusa County Work Furlough 929 Bridge St, Colusa 95932 | (530) 458-0206 |
| Colusa Mosquito Abatement 713 D St, Colusa 95932 | (530) 458-4966 |
| Colusa Recycling 1600 Main St, Colusa 95932 | (530) 458-4131 |
| Road Yard Colusa 95932 | (530) 458-4807 |
| Victim Witness 532 Oak St, Colusa 95932 | (530) 458-0659 |