| Name | Address, Zip |
|---|
| Tcs K-5 Pto | 244 S Monroe St, 44883-2906 |
| North Central Academy | 928 W Market St, 44883-2529 |
| Altrusa International Foundation Inc | Po Box 361, 44883-0361 |
| American Association Of University Women | 2255 S State Route 53, 44883-3801 |
| Hopewell-loudon Education Association | 2330 S County Road 19, 44883-8635 |
| Longanbach Family Association | 259 S Sandusky St, 44883-2745 |
| The Britten J Hess Memorial Scholarship Trust | 50 W County Road 16, 44883-9259 |
| Calvert Catholic Schools Educational Foundation | 152 Madison St, 44883-2825 |
| Seneca Radio Club | Po Box 67, 44883-0067 |
| Old Fort Schools Renovation Committee Inc | 7635 N County Road 51, 44883-9801 |
| Leadership Seneca County Inc | Po Box 235, 44883-0235 |
| Tiffin Eagles Scholarship Foundation Inc | Po Box 458, 44883-0458 |
| Tiffin Seneca Library Foundation | 77 Jefferson St, 44883-2304 |
| Friends Of The Tiffin-seneca Public Library | 77 Jefferson St, 44883-2304 |
| Heidelberg University | 310 E Market St, 44883-2434 |
| Tiffin Middle School Pto | 103 Shepherd Drive, 44883 |
| Tiffin University | 155 Miami St, 44883-2109 |
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