| Business | Phone |
| Center Township Trustee 53 E Walnut St, Frankfort 46041 | (765) 654-5714 |
| City Light & Power 1000 Washington Ave, Frankfort 46041 | (765) 654-4424 |
| Distribution Planning & Design 1000 Washington Ave, Frankfort 46041 | (765) 659-6704 |
| Frankfort City Engineer 301 E Clinton St, Frankfort 46041 | (765) 654-5278 |
| Frankfort City Light & Power 1000 Washington Ave, Frankfort 46041 | (765) 659-3362 |
| Frankfort Clerk 301 E Clinton St, Frankfort 46041 | (765) 654-5715 |
| Frankfort Juvenile Aid 201 W Washington St, Frankfort 46041 | (765) 659-1877 |
| Frankfort Main Street Inc 301 E Clinton St, Frankfort 46041 | (765) 654-4081 |
| Frankfort Sewer Dept 300 N Columbia St, Frankfort 46041 | (765) 654-8343 |
| Frankfort Street Commissioner 905 Burlington Ave, Frankfort 46041 | (765) 659-2912 |