| Name | Address, Zip |
| 17 Chapter Tri-county | 307 Lilac Dr, 63664-1915 |
| Washington County Community 2000 Partnership Inc | 212 E Jefferson St, 63664-1913 |
| Potosi Elks Lodge 2218 Christmas Charity | Po Box 177, 63664-0177 |
| Washington County Council On Aging Inc | 109 Lawrence St, 63664-1530 |
| Old Mines Area Historical Society Inc | Po Box 142, 63664-0142 |
| Ozark Trail Association | 406 W High St, 63664-8497 |
| Citadel Association Inc | 217 E Citadel Dr, 63664-1937 |
| Potosi Baseball Association Incorporated | 18586 State Highway Aa, 63664-9217 |
| Mine Au Breton Historical Society | Po Box 448, 63664-0448 |
| City Of Potosi Public Facilities Authority | 121 E High St, 63664-1906 |
| Cars To Careers Of Washington County | 912 N Missouri St, 63664-2101 |
| St James Catholic Church Potosi | 201 N Missouri St, 63664-1745 |
| Great Mines Health Center | 1 Southtowne Dr, 63664-5729 |
| Great Mines Health Center Foundation | 1 Southtowne Dr, 63664-5729 |
| Fourche Valley Charitable Trust | 10160 Old 8 C, 63664-3120 |
| Washington County Memorial Hospital Foundation | 300 Health Way Dr, 63664-1420 |
| Enhancements Incorporated | 200 Frizzell St, 63664-1520 |
| Jerry West Memorial Fund Inc | Po Box 333, 63664-0333 |
| Mobile Integrated Healthcare Network | 1 Southtowne Dr, 63664-5729 |
| Old Man River Nature Retreat Inc | 11533 Furnace Creek Rd, 63664-5689 |
| Windwalker Ridge Mustang Sanctuary Inc | 24130 W State Highway 8, 63664-1857 |
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