| Name | Deductibility Code |
| Blue Bonnett Casa | -- |
| Bruce Hofmann Ministries | -- |
| Cowboy Stuff Ministries Incorporated | -- |
| Friends of the Mason County M Beven Eckert Memorial Library | -- |
| Gooch Cemetery | 6 |
| Grace Fellowship of Mason | -- |
| Harvest Mill Church | -- |
| Hill Country Resource Conservation and Development Area Inc. | -- |
| Light of the Cross Ministries International | 4 |
| Mason Community Foundation Inc. | -- |
| Mason County Apple Fest | -- |
| Mason County Historical Society Inc. | -- |
| Mason County Library Endowment Inc. | -- |
| Mason County Livestock Show Inc. | -- |
| Mason Isd Education Foundation Inc. | -- |
| Mason Tennis Association | -- |
| Mason Youth Center Inc. | -- |
| New Covenant Fellowship | -- |
| Odeon Preservation Association Inc. | -- |
| Operation Orphans Inc. | -- |
| Peters Prairie School Community Association | -- |
| Riata Service Organization | -- |
| River of Life Church | -- |
| Seeds of Harvest | -- |
| Texas Equestrian Trail Riders Association Inc. | -- |
| Texas Hill Country Nature Project | -- |