| Other organizations in Tennessee |
| Id | Name | Address | State | Established | Total Income |
| 1 | Orchestra Nashville | 34 Music Sq E, Nashville, TN 37203-4323 | TN | 1990-12 | $804,535 |
| 2 | Order Of The Amaranth Inc Supreme Council, Faith Court | 4974 Judy Lynn Ave, Memphis, TN 38118 | TN | 1940-08 | $0 |
| 3 | Order Of The Southern Cross | 115 Public Sq, Gallatin, TN 37066-2839 | TN | 1989-07 | $55,105 |
| 4 | Ore Springs Como Community Fire Department | PO BOX 72, Como, TN 38223-0072 | TN | 1988-05 | $24,665 |
| 5 | Opera Volunteers International | 5833 Briercliff Road, Knoxville, TN 37918 | TN | 1975-10 | $35,686 |
| 6 | Phi Beta Chi Housing Corporation | 2652 Suffolk St, Kingsport, TN 37660-4741 | TN | 2001-09 | $836 |
| 7 | Pi Beta Phi Frate Building Fund | PO BOX 221, Cleveland, TN 37364-0221 | TN | 1945-03 | $267,492 |
| 8 | Orthopaedic Society Inc Tennessee | PO BOX 159035, Nashville, TN 37215-9035 | TN | 1968-02 | $91,873 |
| 9 | Pennsylvania Association Of Chamber Professionals | 1622 Tarklin Valley Road, Knoxville, TN 37920 | TN | 1974-10 | $0 |
| 10 | Original Mountain Cur Breeders Assn | 2475 Banner Springs Rd, Jamestown, TN 38556-5035 | TN | 1976-11 | $94,168 |
| 11 | Orion & Emma B Hurlburt Tr Fbo Memorial Fd Hamilton Natl Bk Ttee | 701 Market Street, Chattanooga, TN 37402-4828 | TN | 1975-04 | $7,983,980 |
| 12 | Orion Foundation | 6321 Cate Rd, Powell, TN 37849-4952 | TN | 1998-02 | $14,230 |
| 13 | Orleans Care Home | 1333 S Orleans St, Memphis, TN 38106-4633 | TN | 1990-07 | $103,509 |
| 14 | Orphanos Foundation | 7185 Lawn Ln, Bartlett, TN 38133-3920 | TN | 1998-02 | $795,882 |
| 15 | Ortale Family Foundation | 424 Sunnyside Dr, Nashville, TN 37205-3414 | TN | 1997-03 | $24,340 |
| 16 | Orthopaedic Surgical Manufacturers Association | 2600 Sofamor Danek Dr, Memphis, TN 38132-1719 | TN | 1998-07 | $214,371 |
| 17 | Oscar L Farris Agricultural Museum Association | 440 Hogan Rd, Nashville, TN 37220-9029 | TN | 1990-04 | $55,889 |
| 18 | Our Daily Bread Inc | PO BOX 580, Spring City, TN 37381-0580 | TN | 2006-10 | $117,634 |
| 19 | Our Daily Bread Of Tennessee Inc | PO BOX 777, Clinton, TN 37717-0777 | TN | 1997-02 | $1,735,976 |
| 20 | Our House Inc | 102 Hartman Dr Ste G Pmb 107, Lebanon, TN 37087 | TN | 2005-09 | $0 |
| 21 | Our Kids Inc | 1804 Hayes St, Nashville, TN 37203-2504 | TN | 1989-03 | $1,593,687 |
| 22 | Our Pride Encompasses Nashville, Open | PO BOX 330931, Nashville, TN 37203-7506 | TN | 2003-09 | $117,704 |
| 23 | Out Central Inc | Po Box 331935, Nashville, TN 37203 | TN | 2008-01 | $24,902 |
| 24 | Outdoor Advertising Assn Of Tenn Inc | 1993 Southerland Dr, Nashville, TN 37207-4423 | TN | 1935-09 | $137,816 |
| 25 | Outdoor Truths Inc | PO BOX 840, Harrogate, TN 37752-0840 | TN | 2007-02 | $85,564 |
| 26 | Outdoorsmen Inc | PO BOX 3303, Kingsport, TN 37664-0303 | TN | 2005-04 | $55,391 |
| 27 | Outreach Foundation Of The Presbyterian Church Inc | 381 Riverside Drive, Franklin, TN 37064-8972 | TN | 1979-11 | $12,089,533 |
| 28 | Outreach Inc | 500 Wilson Pike Cir Ste 340, Brentwood, TN 37027-3225 | TN | 2003-10 | $120,129 |
| 29 | Horizon House Ii Inc | 3009 Lake Brook Blvd, Knoxville, TN 37909-1138 | TN | 1986-05 | $30,442 |
| 30 | Overlook Senior Citizen Housing Of Loudon County Inc | 407 E Main St, Morristown, TN 37814-4742 | TN | 1989-10 | $133,998 |
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