| Other organizations in Ohio |
| Id | Name | Address | State | Established | Total Income |
| 1 | Clark County Medical Society | 4 W Main St Ste 534, Springfield, OH 45502-2325 | OH | 1961-05 | $33,716 |
| 2 | Clark County Mental Health Foundation | 1055 E High St, Springfield, OH 45505-1157 | OH | 1986-09 | $14,773 |
| 3 | Clark Development Corporation | 3167 Fulton Rd Ste 303, Cleveland, OH 44109-1466 | OH | 1978-06 | $525,860 |
| 4 | Clark Family Charitable Foundation | 5580 Lundy Whitacre Rd, Morrow, OH 45152-7170 | OH | 2001-03 | $10,235 |
| 5 | Clark Foundation Inc | 430 Grinnell St, Pickerington, OH 43147-7965 | OH | 2007-06 | $20,027 |
| 6 | Clark Memorial Home Association | 106 Kewbury Rd, Springfield, OH 45504-1144 | OH | 1974-08 | $1,056,393 |
| 7 | Clark Montessori School Foundation Inc | 5425 Winton Ridge Ln, Cincinnati, OH 45232-1140 | OH | 1998-05 | $207,394 |
| 8 | Clark P And Laura A Mccoy Scholarship Trust | PO BOX 94651, Cleveland, OH 44101-4651 | OH | 1992-08 | $147,448 |
| 9 | Clark Technical College Scholarship Foundation | 570 E Leffel Ln, Springfield, OH 45505-4749 | OH | 1968-04 | $1,997,165 |
| 10 | Clark W Davis Tr Uw Fbo Cincinnati Art Museum 3737004 | PO BOX 630858, Cincinnati, OH 45263-0858 | OH | | $166,357 |
| 11 | Clark W Davis Tr Uw Fbo Clifton Methodist Church 3736907 | PO BOX 630858, Cincinnati, OH 45263-0858 | OH | | $243,713 |
| 12 | Clark W Wilson Trust | 4900 Tiedeman Rd Oh-01-49-0150, Brooklyn, OH 44144-2338 | OH | 1973-08 | $11,935 |
| 13 | Clarke Family Charitable Foundation | 50 Stonecreek Dr, Chagrin Falls, OH 44022-2547 | OH | 2001-06 | $38,860 |
| 14 | Clary Foundation | 305 Main St, Coshocton, OH 43812-1588 | OH | 2000-03 | $1 |
| 15 | Clary Garden Foundation | 588 W Chestnut St, Coshocton, OH 43812-1010 | OH | 2001-12 | $182,625 |
| 16 | Class Of 1924 Mckinley High School 20-10-216-0215100 | 4900 Tiedeman Rd, Brooklyn, OH 44144-2338 | OH | 1971-11 | $10,583 |
| 17 | Claude R Laughlin Trust Fbo, Beaverton School District No 48 | 4900 Tiedeman Rd Oh-01-49-0150, Brooklyn, OH 44144-2338 | OH | | $266,612 |
| 18 | Claude Walden Johnson Foundation Inc | PO BOX 1271, Cincinnati, OH 45201-1271 | OH | 1998-10 | $4,012 |
| 19 | Claw Corp, Cleveland Leather Annual Weekend | 3753 W 176th St, Cleveland, OH 44111-4026 | OH | 2004-01 | $238,084 |
| 20 | Clay Athletic Boosters | 44 Clay High St, Portsmouth, OH 45662-8817 | OH | 2008-12 | $74,789 |
| 21 | Clay Avenue Community School | 1030 Clay Ave, Toledo, OH 43608-2167 | OH | 2009-04 | $3,523,848 |
| 22 | Clay Eddy Fields Assn | 8233 Whispering Pines Dr, Russell, OH 44072-9535 | OH | 2005-09 | $13,827 |
| 23 | Clay High School Athletic Boosters Club Inc | 7654 W Bancroft St, Toledo, OH 43617-1658 | OH | 2001-01 | $34,526 |
| 24 | Clay Valley Foundation | 213 E Brown St, Crooksville, OH 43731-1212 | OH | 2001-09 | $2,422 |
| 25 | Clay-Genoa Volunteer Firemans Association Of Genoa Ohio | 101 Sixth Street, Genoa, OH 43430 | OH | 1987-06 | $0 |
| 26 | Clayman Family Foundation Inc | PO BOX 200, Canfield, OH 44406-0200 | OH | 1992-02 | $40,764 |
| 27 | Claymont City Schools Claymont Foundation Inc | PO BOX 255, Dennison, OH 44621-0255 | OH | 1997-02 | $713,081 |
| 28 | Claymont Community Center Inc | 330 N Main St, Uhrichsville, OH 44683-1835 | OH | 1988-10 | $3,956 |
| 29 | Claymont Jaycee Housing Inc | 1000 Claymont Dr, Uhrichsville, OH 44683-2322 | OH | 1972-04 | $572,493 |
| 30 | Claymont Mustang Booster Club Inc | PO BOX 604, Uhrichsville, OH 44683-0604 | OH | 2006-11 | $96,454 |
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