| Name | Deductibility Code |
| Astern Ministries Inc. | -- |
| Atad Inc. | -- |
| Cass County Historical Society | -- |
| Cass County Historical Society Foundation | -- |
| Cass County Nebraska Economic Development Council | -- |
| Cass County Public Safety Foundation | -- |
| Catholic Engaged Encounter of Eastern Nebraska Inc. | -- |
| Community Health Partners of Cass County Chpcc | -- |
| Deal Foundation | 4 |
| Dorothy E Swanson Charitable Trust | 4 |
| Foundation for Providing Opportunities for Plattsmouth | -- |
| Friends of Cass County Casa Program | -- |
| Friends of the Plattsmouth Public Library | -- |
| Happy Hearts | -- |
| John S Burk and Mae L Burk Memorial Foundation | 4 |
| Nebraska Masonic Home | -- |
| Nebraska Masonic Home Foundation | -- |
| Operation Reach Out-Usa | -- |
| Plattsmouth Baseball Parents Association | -- |
| Plattsmouth Conservancy Inc. | -- |
| Plattsmouth Economic Development Corporation | 4 |
| Plattsmouth Elementary School Pto Inc. | -- |
| Plattsmouth Public Library Foundation | -- |
| Plattsmouth Soccer Club | -- |
| Polish Heritage Society of Nebraska Inc. | -- |