| Business | Phone |
| Wahkiakum Building Inspector 64 Main St, Cathlamet 98612 | (360) 795-3067 |
| Wahkiakum County Chemical 42 Elochoman Valley Rd, Cathlamet 98612 | (360) 795-6212 |
| Wahkiakum County Commissioners 64 Main St, Cathlamet 98612 | (360) 795-8048 |
| Wahkiakum County Fire Dist 2 Cathlamet 98612 | (360) 795-0707 |
| Wahkiakum County Human Rsrcs 42 Elochoman Valley Rd, Cathlamet 98612 | (360) 795-3917 |
| Wahkiakum Public Works Dept 64 Main St, Cathlamet 98612 | (360) 795-3301 |
| Wsu Cooperative Ext 25 River St, Cathlamet 98612 | (360) 795-3278 |
| Wsu Cooperative Ext 68 Main # D, Cathlamet 98612 | (360) 795-3278 |
| County Road Shop 73 Elochoman Valley Rd, Cathlamet 98612 | (360) 795-3251 |