| Other organizations in Washington |
| Id | Name | Address | State | Established | Total Income |
| 1 | Classical Conversations Sammamish | 10525 302nd Way Ne, Carnation, WA 98014 | WA | | $0 |
| 2 | Classical Home Learning Group | 16309 Ne 44th Street, Vancouver, WA 98682 | WA | | $0 |
| 3 | Climb The Mountain Speech And Debate Foundation | 7702 32nd Ave Ne, Seattle, WA 98115 | WA | | $0 |
| 4 | Clinton Community Council | Po Box 63, Clinton, WA 98236 | WA | | $0 |
| 5 | Coalition For Standards And Ethics | 9456 35th Ave Sw, Seattle, WA 98126 | WA | 2014-12 | $0 |
| 6 | College Place Boosters | 1755 S College Ave, College Place, WA 99324 | WA | | $0 |
| 7 | College Promise Coalition | 603 Stewart Street Suite 819, Seattle, WA 98101 | WA | | $0 |
| 8 | Columbia River Gorge Visitors Assoc | PO BOX 1037, Stevenson, WA 98648 | WA | 2014-05 | $0 |
| 9 | Columbus Club Of Walla Walla | Po Box 1593, Walla Walla, WA 99362 | WA | | $0 |
| 10 | Community Network-Greater Seattle Area | Po Box 1521, Bothell, WA 98041 | WA | | $0 |
| 11 | Country Park Homeowners Association | Po Box 1573, Graham, WA 98338 | WA | | $0 |
| 12 | Cowiche Creek Water Users Association | 2904 Canterbury Ln, Yakima, WA 98902 | WA | 2014-09 | $0 |
| 13 | Cpo Association | 5101 N Assembly St, Spokane, WA 99205 | WA | | $0 |
| 14 | Craving Cajun | Po Box 5981, Lacey, WA 98509 | WA | | $0 |
| 15 | Crawford Ln Maintenance Assn | 305 Crawford Lane, Yakima, WA 98901 | WA | | $0 |
| 16 | Crescent Masonic Builders Association | Pobox 861, Enumclaw, WA 98022 | WA | | $0 |
| 17 | Crestview West Water System | Po Box 194, Kent, WA 98035-0194 | WA | 2014-01 | $0 |
| 18 | Culture Legacy Outreach International | Po Box 26961, Federal Way, WA 98093 | WA | | $0 |
| 19 | Cusick Community In Action Together | Po Box 22, Cusick, WA 99119 | WA | | $0 |
| 20 | Daughters Of Union Veterans Tent 1 | Box 82567, Kenmore, WA 98028 | WA | | $0 |
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