| Capital City Orthopedic Education Foundation Inc. | Washington, DC |
| Capital City Public Charter School Inc. | Washington, DC |
| Capital Commitment Incorporated | Washington, DC |
| Capital Community Institute Inc. (Until December 2004) | Washington, DC |
| Capital Concerts Inc. | Washington, DC |
| Capital Interfaith Hospitality Network Inc. | Washington, DC |
| Capital Metropolitan Rainbow Alliance Inc. | Washington, DC |
| Capital Partners for Education | Washington, DC |
| Capital Peers Inc. | Washington, DC |
| Capital Renaissance Theatre Company (Until July 2006) | Washington, DC |
| Capital Research Center | Washington, DC |
| Capital Rowing Club Inc. | Washington, DC |
| Capital University of Integrative Medicine | Washington, DC |
| Capital Youth Inc. (Until December 2006) | Washington, DC |
| Capitol Ballet Guild Inc. | Washington, DC |
| Capitol City Career Development & Job Training Partnership (Until December 2006) | Washington, DC |
| Capitol Education Fund | Washington, DC |
| Capitol Fire Museum Inc. | Washington, DC |
| Capitol Heroes Campaign Inc. (Until December 2005) | Washington, DC |
| Capitol Hill Arts Workshop | Washington, DC |
| Capitol Hill Baseball and Softball League Inc. (Until December 2006) | Washington, DC |
| Capitol Hill Cluster School Parent Teacher Association | Washington, DC |
| Capitol Hill Community Foundation | Washington, DC |
| Capitol Hill Community Garden Land Tr (Until December 2004) | Washington, DC |
| Capitol Hill Computer Corner (Until December 2005) | Washington, DC |
| Capitol Hill Cooperative Nursery School | Washington, DC |
| Capitol Hill Crisis Pregnancy Center | Washington, DC |
| Capitol Hill Day School | Washington, DC |
| Capitol Hill Garden Club Inc. (Until December 2006) | Washington, DC |
| Capitol Hill Group Ministry | Washington, DC |
| Capitol Hill Neighborhood Information Center | Washington, DC |
| Capitol Hill Restoration Society Inc. | Washington, DC |
| Capitol Hill Supportive Services Program Inc. | Washington, DC |
| Caplin Foundation 4 | Washington, DC |
| Capper Carrollsburg on the Hill Community Development Corporation (Until December 2005) | Washington, DC |
| Carbonfund Org (Until December 2007) | Washington, DC |
| Cardoza Heights Association for Neighborhood Growth & Enrichment | Washington, DC |
| Cardozo Evening High School Alumni Association | Washington, DC |
| Career Action Plan Group | Washington, DC |
| Career College Foundation | Washington, DC |
| Caribbean American Intercultural Organization Inc. | Washington, DC |
| Caribbean Latin American Action | Washington, DC |
| Caribnation (Until December 2006) | Washington, DC |
| Caricare Incorporated | Washington, DC |
| Caring Institute | Washington, DC |
| Carl Schmitt Foundation Inc. | Washington, DC |
| Carl Vogel Foundation Inc. | Washington, DC |
| Carleton University Foundation US | Washington, DC |
| Carlos Rosario International Career Center Inc. | Washington, DC |
| Carlos Rosario International Public Charter School | Washington, DC |
| Carnegie Endowment for International Peace 4 | Washington, DC |
| Carnegie Institution of Washington | Washington, DC |
| Carolina Affordable Housing Inc. (Until June 2005) | Washington, DC |
| Carolyn and Kenneth D. Brody Foundation Inc. 4 | Washington, DC |
| Carpenter Medical Publishing Inc. | Washington, DC |
| Carpenters Helping Hand Inc. | Washington, DC |
| Carroll Publishing Company T. A. Catholic Standard Newspaper | Washington, DC |
| Carrollsburg Residence Council Inc. | Washington, DC |
| Carrying Capacity Communications Inc. | Washington, DC |
| Carrying Capacity Network Inc. | Washington, DC |
| Carter & Melissa Cafritz Charitable Tr 4 | Washington, DC |
| Carter Foundation 4 | Washington, DC |
| Casa for Children of the District of Columbia (Until December 2006) | Washington, DC |
| Casey Trees Endowment Fund | Washington, DC |
| Catalyst Theater Company (Until December 2005) | Washington, DC |
| Cathedral Assembly of Reconciliation | Washington, DC |
| Cathedral Choral Society of Washington Dc Washington Cathedral | Washington, DC |
| Catholic Artists of Greater Washington D. C. Inc. (Until September 2008) | Washington, DC |
| Catholic Biblical Association of America | Washington, DC |
| Catholic Immigration Service | Washington, DC |
| Catholic Legal Immigration Network Inc. | Washington, DC |
| Catholic Roman Churches in the U. S. it's Territories & Possn's 1 | Washington, DC |
| Catholic Truth Society of America | Washington, DC |
| Catholic University of America | Washington, DC |
| Catholics for A. Free Choice | Washington, DC |
| Cato Institute | Washington, DC |
| Cau Cedars Inc. | Washington, DC |
| Cau Eagles Pointe Inc. | Washington, DC |
| Cause Children Count Coalition | Washington, DC |
| Cdia Foundation | Washington, DC |
| Cdim Inc. | Washington, DC |
| Cease Fire Dont Smoke the Brothers Inc. | Washington, DC |
| Cedice Foundation | Washington, DC |
| Cedron Brook Baptist Church Inc. | Washington, DC |
| Celadon Inc. | Washington, DC |
| Celestial Church of Christ | Washington, DC |
| Center City Community Corporation | Washington, DC |
| Center Fpr International Business Development | Washington, DC |
| Center for A. Free Cuba | Washington, DC |
| Center for A. Sustainable Economy | Washington, DC |
| Center for Adult Development | Washington, DC |
| Center for Advanced Studies | Washington, DC |
| Center for Advancement of Public Policy | Washington, DC |
| Center for American Progress (Until December 2006) | Washington, DC |
| Center for Applied Linguistics | Washington, DC |
| Center for Arms Control and Non-Proliferation | Washington, DC |
| Center for Artistry in Teaching | Washington, DC |
| Center for Arts and Culture | Washington, DC |
| Center for Auto Safety Inc. | Washington, DC |
| Center for Child Protection and Family Support Inc. | Washington, DC |
| Center for Childrens Environmental Literature Inc. | Washington, DC |
| Center for Clean Air Policy | Washington, DC |
| Center for Communications Health and the Environment | Washington, DC |
| Center for Community Change | Washington, DC |
| Center for Community Corrections | Washington, DC |
| Center for Community Lending | Washington, DC |
| Center for Conflict Prevention and Resolution in Africa | Washington, DC |
| Center for Confucian Science | Washington, DC |
| Center for Consumer Freedom (Until December 2006) | Washington, DC |
| Center for Continuing Education | Washington, DC |
| Center for Corporate Citizenship of the US Chamber of Commerce (Until December 2004) | Washington, DC |
| Center for Correctional Health & Policy Studies Inc. | Washington, DC |
| Center for Creative Change (Until December 2005) | Washington, DC |
| Center for Defense Information | Washington, DC |
| Center for Democracy | Washington, DC |
| Center for Democracy and Technology | Washington, DC |
| Center for Digital Democracy | Washington, DC |
| Center for Dispute Settlement | Washington, DC |
| Center for Economic and Policy Research | Washington, DC |
| Center for Education Information | Washington, DC |
| Center for Education Reform | Washington, DC |
| Center for Empowerment and Educational Development | Washington, DC |
| Center for Enpowerment & Empolyment Training | Washington, DC |
| Center for Environmental Citizenship Inc. | Washington, DC |
| Center for Ethiopian Art and Culture | Washington, DC |
| Center for Food Safety | Washington, DC |
| Center for Genetics Nutrition & Health | Washington, DC |
| Center for Genetics Nutrition and Health Inc. | Washington, DC |
| Center for Global Development (Until September 2006) | Washington, DC |
| Center for Housing Policy | Washington, DC |
| Center for Hyperactive Child Information Incorporated | Washington, DC |
| Center for Immigrant Democracy (Until June 2006) | Washington, DC |
| Center for Immigration Studies Inc. | Washington, DC |
| Center for Individual Rights | Washington, DC |
| Center for International Environmental Law Inc. | Washington, DC |
| Center for International Private Enterprise Inc. | Washington, DC |
| Center for Law and Education Inc. | Washington, DC |
| Center for Law and Social Policy | Washington, DC |
| Center for Legal Advocacy and Empowerment Incorporated (Until December 2006) | Washington, DC |
| Center for Life Enrichment Inc. | Washington, DC |
| Center for Livable Cities | Washington, DC |
| Center for Maya Research | Washington, DC |
| Center for Media Education Inc. | Washington, DC |
| Center for Media and Public Affairs Inc. | Washington, DC |
| Center for Mental Health Inc. | Washington, DC |
| Center for Military Recruitment Assessment and Veterans Employment (Until December 2006) | Washington, DC |
| Center for Mind-Body Medicine | Washington, DC |
| Center for National Policy | Washington, DC |
| Center for New Black Leadership | Washington, DC |
| Center for New Creation | Washington, DC |
| Center for Policy Alternatives | Washington, DC |
| Center for Preservation Initiatives | Washington, DC |
| Center for Private Conservation (Until December 2006) | Washington, DC |
| Center for Progressive Leadership (Until December 2007) | Washington, DC |
| Center for Public Data Access Inc. (Until December 2004) | Washington, DC |
| Center for Public Integrity | Washington, DC |
| Center for Public Safety Inc. | Washington, DC |
| Center for Resource Economics | Washington, DC |
| Center for Respect of Life & Environment | Washington, DC |
| Center for Responsive Politics | Washington, DC |
| Center for Science in the Public Interest | Washington, DC |
| Center for Security Policy Inc. | Washington, DC |
| Center for Security Studies | Washington, DC |
| Center for Spinal Cord Injury Independence (Until December 2007) | Washington, DC |
| Center for Strategic and Budgetary Assessments | Washington, DC |
| Center for Strategic and International Studies Inc. | Washington, DC |
| Center for Study of Responsive Law | Washington, DC |
| Center for Sustainable Development in the Americas | Washington, DC |
| Center for Teaching Peace Inc. | Washington, DC |
| Center for Telemedicine Law Inc. | Washington, DC |
| Center for Understanding the Role of Education (Until December 2006) | Washington, DC |
| Center for Urban Education | Washington, DC |
| Center for Visionary Law Business and Public Policy | Washington, DC |
| Center for Visionary Leadership | Washington, DC |
| Center for Women Policy Studies Inc. | Washington, DC |
| Center for Womens Business Research | Washington, DC |
| Center for the Advancement of Health | Washington, DC |
| Center for the Advancement of Hispanics in Scnc & Engineering Ed | Washington, DC |
| Center for the Child Care Workforce | Washington, DC |
| Center for the Development of Schools and Communities | Washington, DC |
| Center for the Economic Analysis of Law Institute | Washington, DC |
| Center for the Study of Islam and Democracy Inc. | Washington, DC |
| Center for the Study of Justice System Reform (Until December 2005) | Washington, DC |
| Center for the Study of Services | Washington, DC |
| Center for the Study of Social Policy | Washington, DC |
| Center for the Study of the Presidency | Washington, DC |
| Center of Argentine Students and Alumni in the United States | Washington, DC |
| Center on Budget and Policy Priorities | Washington, DC |
| Center on Conscience & War | Washington, DC |
| Center on Disability and Health | Washington, DC |
| Center on Education Policy | Washington, DC |
| Central American Community Development Foundation (Until December 2004) | Washington, DC |
| Central American Resource Center- Carecen | Washington, DC |
| Central Baptist Church | Washington, DC |
| Central Union Mission | Washington, DC |
| Central and Eastern European Art Foundation | Washington, DC |
| Centre Haitien Dinformation De Documentation Et Daction Sociale | Washington, DC |
| Centre for Development and Population Activities | Washington, DC |
| Centre for Science & Environment 3 | Washington, DC |
| Centrists Org Inc. (Until December 2007) | Washington, DC |
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