| Name | Deductibility Code |
| A G and Phelo Thompson Scholarship Trust Inc. | 4 |
| Center Valley Cemetary Trust Fund | 6 |
| Central Texas Wildlife Institute Inc. | -- |
| Community Bible Church | -- |
| Cottage Hill Cemetery Association of Hamilton County Texas | 6 |
| E O Elam Scholarship Trust Fund | 4 |
| Faith in Christ Mission | -- |
| Friends of Firefighters | -- |
| Friends of Library-Hamilton County Texas | -- |
| Gentrys Mill Cemetery Association | 6 |
| Grace Open Door Fellowship Inc. | -- |
| H-Bat Inc. | -- |
| Hamilton Cemetery Association Inc. | 6 |
| Hamilton Civic Theater | -- |
| Hamilton County Carenet | -- |
| Hamilton County Genealogical Society | -- |
| Hamilton County Historical Museum | -- |
| Hamilton County Special Needs Cook Off Inc. | 4 |
| Hamilton General Hospital Healthcare Foundation | -- |
| Hamilton Trinity Fellowship Inc. | -- |
| Hamilton United Care Inc. | -- |
| Hamilton Volunteer Fire Department | -- |
| Huts for Mutts-Hamilton Dog Rescue | -- |
| Live Oak Bible Church | -- |
| Living Waters Worship Center of Hamilton | -- |
| Lutheran World Mission Outreach | -- |
| Park Heights Church of Christ | -- |
| Platoro Fire & Safety Inc. | -- |
| Prof Rodney Love Scholarship Trust Inc. | -- |
| Seth and Mabelle Moore Scholarship Trust | 4 |
| Shive Volunteer Fire Department Inc. | -- |
| Texas Game Warden Association Inc. | -- |
| Thompson Charitable Foundation | 4 |
| Womans Council of Hamilton County Inc. | -- |