| Other organizations in Washington |
| Id | Name | Address | State | Established | Total Income |
| 1 | Okanogan Family Planning Program | 127 N Juniper St, Omak, WA 98841-9337 | WA | 1982-02 | $338,934 |
| 2 | Okanogan Highlands Alliance | PO BOX 163, Tonasket, WA 98855-0163 | WA | 1993-11 | $781,338 |
| 3 | Okanogan Valley Boots & Saddle Club | 28 Band O West Rd, Okanogan, WA 98840 | WA | 1956-05 | $24,613 |
| 4 | Okanogan Land Trust | P0 B0x 293, Tonasket, WA 98855 | WA | 1991-05 | $291,796 |
| 5 | Okanogan Valley Orchestra And Chorus | PO BOX 1636, Omak, WA 98841-1636 | WA | 1984-06 | $70,635 |
| 6 | Okanogan Valley Team Penning Association | Po Box 1329, Omak, WA 98841 | WA | 1999-05 | $0 |
| 7 | Okinawa Kenjin Club Of Washington State | 23405 56th Ave W, Mountlake Ter, WA 98043-5201 | WA | 2007-10 | $17,257 |
| 8 | Olalla Pta 1 8 9 | 6100 Se Denny Bond Blvd, Olalla, WA 98359 | WA | 1993-11 | $0 |
| 9 | Olalla Recovery Centers | 12851 Lala Cove Ln Se, Olalla, WA 98359-9664 | WA | 1975-03 | $2,514,205 |
| 10 | Old Fairhaven Association | 1106 Harris Ave, Bellingham, WA 98225-7001 | WA | 1984-08 | $160,164 |
| 11 | Old Hotel | 33 E Larch St, Othello, WA 99344 | WA | 1975-08 | $0 |
| 12 | Old Settlers Association Of Whatcom County | PO BOX 993, Ferndale, WA 98248-0993 | WA | 1974-12 | $77,449 |
| 13 | Old Settlers Water Association | PO BOX 604, Custer, WA 98240-0604 | WA | 1955-04 | $96,812 |
| 14 | Old Town Christian Ministries | PO BOX 29538, Bellingham, WA 98228-1538 | WA | 1987-01 | $121,460 |
| 15 | Old Town Cooperative Preschool | 2710 N Madison Street, Tacoma, WA 98407 | WA | 1971-06 | $0 |
| 16 | Old Union Irrigation Company | 117 N Third Street, Yakima, WA 98901-2766 | WA | 1934-02 | $71,063 |
| 17 | Olddog Haven | 9016 99th Ave Ne, Arlington, WA 98223-8804 | WA | 2006-01 | $710,505 |
| 18 | Olga Strawberry Council | Po Box 214, Olga, WA 98279 | WA | 2005-12 | $0 |
| 19 | Olga Water Users Inc | PO BOX 44, Olga, WA 98279-0044 | WA | 1938-02 | $66,437 |
| 20 | Olympia Alano Club Inc | 407 Water St Sw, Olympia, WA 98501-1046 | WA | 1970-04 | $83,263 |
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