| Name | Deductibility Code |
| Bluff City International Church Inc. | -- |
| Church of Christ | -- |
| Clement E Armstrong Charitable Foundation | 4 |
| Community Chest of Havana | -- |
| Fairview Methodist Church Trust | -- |
| Havana Area Community Emergency Food Pantry | -- |
| Havana Area Prevention Team Inc. | -- |
| Havana Community Unit School Foundation | -- |
| Havana-Mason Crime Stoppers | -- |
| John Adam Schaad & Mildred E Schaad Trust | 4 |
| Laurel Hill Cemetery Association | 6 |
| Laurel Hill Mausoleum Company | 6 |
| Lemmer-Blazer Scholarship Fund | 4 |
| Mae Howell Trust U-W | -- |
| Mahomet Aquifer Consortium | -- |
| Margaret Farrer Trust Havana Natl Bk Ttee | 4 |
| Margaret Heffron Wepner Charitable Foundation | 4 |
| Mason County Dive & Rescue | -- |
| Mason County Farm Bureau Foundation | -- |
| Mason County Generalogical and Historical Society | -- |
| Mason District Hospital Foundation | -- |
| Mason Hospital Auxiliary | -- |
| McFarland Charitable Foundation | 4 |
| McFarland Med Tr Under 2nd Codicil Last Will & Test of William E | 4 |
| Ministerio De Amor Inc. | -- |
| Mitchell Family Trust | -- |
| Prairieland Council Inc. Nfp | -- |
| St. Pauls Evangelical Lutheran Foundation | -- |