| Business | Phone |
| Center Twp Assessor 410 Courthouse Sq, Frankfort 46041 | (765) 659-6305 |
| Clinton County Assessor 430 Courthouse Sq, Frankfort 46041 | (765) 659-6315 |
| Clinton County Auditor 225 Courthouse Sq, Frankfort 46041 | (765) 659-6330 |
| Clinton County Treasurer 220 Courthouse Sq, Frankfort 46041 | (765) 659-6325 |