| Business | Phone |
| Caldwell Tax Assessor 1 Provost Sq, Caldwell 7006 | (973) 226-6349 |
| Caldwell Tax Collector 1 Provost Sq, Caldwell 7006 | (973) 226-6347 |
| Caldwell Treasurer 1 Provost Sq, Caldwell 7006 | (973) 403-4632 |
| North Caldwell Tax Assessor 136 Gould Ave, Caldwell 7006 | (973) 228-6417 |
| North Caldwell Tax Collector 151 Gould Ave, Caldwell 7006 | (973) 228-6418 |