| Name | Deductibility Code |
| Brighter Beginnings Through Conductive Education | -- |
| Brooks Family Ministries Inc. | -- |
| Camp Sychar Association | -- |
| Care Train of Union County | -- |
| Child Assault Prevention Project of Union County Inc. | -- |
| Community and Seasoned Citizens | -- |
| Community Foundation of Union County Inc. | -- |
| Creekview Intermediate School Parent Teacher Organization | -- |
| East Elementary Parent Teacher Organization | -- |
| Edgewood Elementary Pto | -- |
| Elite Fc Inc. | -- |
| Fairbanks Panthers Athletic Boosters | -- |
| Forgotten Persian Rescue and Friends Inc. | -- |
| Friends of the Marysville Public Library | -- |
| Heart of Ohio Girls Softball Assoc | -- |
| Honda of America Foundation | 4 |
| International Family Center | -- |
| Kevin Mabry Ministries Inc. | -- |
| Lady Monarch Softball Inc. | -- |
| Life Family Church Inc. | -- |
| Life Through the Word Ministries | -- |
| Lighthouse Christian Fellowship | -- |
| Marysville Area Ministerial Association | -- |
| Marysville Christian Church | -- |
| Marysville Food Pantry Inc. | -- |
| Marysville Grace Brethren Church | -- |
| Marysville High School Alumni Scholarship Foundation Inc. | -- |
| Marysville High School Band Boosters Inc. | -- |
| Marysville Housing II Inc. | -- |
| Marysville Housing III Inc. | -- |
| Marysville Housing Inc. | 6 |
| Marysville Independent Travel Baseball Teams | -- |
| Marysville Junior Baseball & Softball Association Inc. | -- |
| Marysville Junior Football Association | -- |
| Marysville Lydias House Inc. | -- |
| Marysville Public Library | -- |
| Marysville Rugby Club | -- |
| Marysville Schools Choral Boosters Association | -- |
| Marysville Victory Center | -- |
| Memorial Hospital Auxiliary of Union County Inc. | -- |
| Mental Health Association of Union County | -- |
| Monarch Athletic Association | -- |
| Monarch Diamond Club | -- |
| Monarch Quarterback Club | -- |
| Mudgett Family Foundation Inc. | 4 |
| Navin Elementary School Parent Teacher Organization | -- |
| New Life Nurse-Midwifery Care | -- |
| Northwood Elementary School Parent Teacher Organization | -- |
| Ohio Cattlemens Foundation | -- |
| Ohio Genealogical Society | -- |
| Ohio Therapeutic Community Association | -- |
| Parent-Teacher Organization of Mill Valley Elem School | -- |
| Playmakers 79ers | 4 |
| Poultry Development Service | -- |
| Pregnancy Care Center of Union County | -- |
| Servanthood Fellowship | -- |
| Spay Neuter Incentive Project and Sanctuary Inc. | -- |
| Spotlight Theatre of Union County Inc. | -- |
| Sunrise Sanctuary Inc. | -- |
| The Ohio Association for College Admission Counseling | -- |
| Trinity Lutheran Church American | -- |
| U-Co Industries Inc. | -- |
| Union County Aids Task Force | -- |
| Union County Cancer Society Inc. | -- |
| Union County Community Concert Association Inc. | -- |
| Union County Community Services Association Inc. | -- |
| Union County Criminal Defense Lawyers | -- |
| Union County Family Young Mens Christian Association | -- |
| Union County Historical Society | -- |
| Union County Hospital Association | -- |
| Union County Hospital Association Inc. | -- |
| Union County Humane Society | -- |
| Union County Independent Soccer League Inc. | -- |
| Union County Junior Football League | -- |
| Union County Military Family Support Group | -- |
| Union County Personal Needs Pantry | -- |
| Union Recyclers | -- |
| Union Rural Electric Trust Inc. | -- |
| United Way of Union County Inc. | -- |
| Vineyard Church of Marysville | -- |
| Windsor and Community Seniors Inc. | -- |
| Wings Enrichment Center | -- |
| World of Wonders Childcare & Learning Center | -- |