| Name | Deductibility Code |
| California Technological Care | -- |
| Castillejos Association of Northern California | -- |
| Center of Movement | -- |
| Cusik-Charlesworth-S R J C Hall of Fame Memorial | -- |
| Delta Natural History Association | -- |
| First Baptist Church | -- |
| Foundation for the Healing Arts | -- |
| Hispanic Internal Revenue Employees Hire | -- |
| Jim Monck Ministries Inc. | -- |
| John Clifford Hamilton Foundation | 4 |
| Lucid Mso-458 Foundation | -- |
| Montezuma Volunteer Firefighters Association | -- |
| Mulege Students Scholarship Program Inc. | -- |
| Rio Vista Care Inc. | -- |
| Rio Vista Citizens for Seniors | -- |
| Rio Vista Farm Bureau Center Scholarship Fund | 4 |
| Rio Vista Firemens Assoc | 4 |
| Rio Vista Foundation | -- |
| Rio Vista Friends of the Library | -- |
| Rio Vista Ministry Inc. | -- |
| Rio Vista Museum Association Inc. | -- |
| River City Raiders | -- |
| Trilogy at Rio Vista Bingo Club | -- |