| Business | Phone |
| St Louis County Circuit Clerk 7900 Carondelet Ave, Clayton 63105 | (314) 615-8029 |
| St Louis County Domestic Rltns 7900 Carondelet Ave, Clayton 63105 | (314) 615-8093 |
| St Louis County Human Resource 121 S Meramec Ave, Clayton 63105 | (314) 615-4429 |
| St Louis County Jury Info 7900 Carondelet Ave # 6, Clayton 63105 | (314) 615-2669 |
| St Louis County Justice Svc 100 S Central Ave # 3, Clayton 63105 | (314) 615-5245 |
| St Louis County Older Resident 121 S Meramec Ave, Clayton 63105 | (314) 615-4516 |
| St Louis County Retirement 41 S Central Ave # 5, Clayton 63105 | (314) 615-8110 |
| St Louis County Risk Manager 41 S Central Ave, Clayton 63105 | (314) 615-7099 |