| Business | Phone |
| Walla Walla County Assessor 315 W Main St 105, Walla Walla 99362 | (509) 527-3216 |
| Walla Walla County Auditor 315 W Main St, Walla Walla 99362 | (509) 527-3204 |
| Walla Walla County Treasurer 315 W Main St 204, Walla Walla 99362 | (509) 527-3212 |