| Business | Phone |
| Accounts Payable 205 N River St, Seguin 78155 | (830) 401-2456 |
| City Of Seguin Purchasing Dept 815 Nelda St, Seguin 78155 | (830) 401-2453 |
| City Secretary 205 N River St, Seguin 78155 | (830) 401-2468 |
| Fairview Community Center 744 Legette St, Seguin 78155 | (830) 379-0573 |
| Health Inspections 205 N River St, Seguin 78155 | (830) 401-2432 |
| Pradera Community Center 813 E Seideman St, Seguin 78155 | (830) 379-0558 |
| Roseland Heights Community Center 602 E Rosemary Dr, Seguin 78155 | (830) 379-0761 |
| Seguin Animal Control 809 S River St, Seguin 78155 | (830) 401-2335 |
| Seguin Citizen Requests 205 N River St, Seguin 78155 | (830) 401-2445 |
| Seguin City Engineer 205 N River St, Seguin 78155 | (830) 401-2439 |
| Seguin Downtown Main Street 205 N River St, Seguin 78155 | (830) 401-2448 |
| Personnel Dept 205 N River St, Seguin 78155 | (830) 401-2470 |
| Planning Codes Dept 205 N River St, Seguin 78155 | (830) 401-2435 |