| Business | Phone |
| Sioux County Assessor 210 Central Ave Sw, Orange City 51041 | (712) 737-4274 |
| Sioux County Auditor 210 Central Ave Sw, Orange City 51041 | (712) 737-2216 |
| Sioux County Treasurer 104 1st St, Orange City 51041 | (712) 737-2222 |
| Sioux County Treasurer-Tax 104 1st St Se, Orange City 51041 | (712) 737-3505 |