| Community Enrichment CenterEIN 75-2231694 | Human Services | TX | $3,585,846Mid-sized | 93.47 |
| Community Food Bank of Eastern OklahomaEIN 73-1184980 | Human Services | OK | $43,371,982Large | 96.27 |
| Community Food Bank of Southern ArizonaEIN 51-0192519 | Human Services | AZ | $111,072,094Large | 96.46 |
| Community Food ShareEIN 74-2227731 | Human Services | CO | $20,601,342Large | 98.39 |
| Community FoodBank of New JerseyEIN 22-2423882 | Human Services | NJ | $109,440,055Large | 93.22 |
| Community Foundation for Greater BuffaloEIN 22-2743917 | Community Development | NY | $24,816,523Large | 95.13 |
| Community Foundation for Southeast MichiganEIN 38-2530980 | Community Development | MI | $63,998,200Large | 92.29 |
| Community Foundation for the Fox Valley RegionEIN 39-1548450 | Community Development | WI | $25,089,419Large | 91.93 |
| Community Foundation of Greater MemphisEIN 58-1723645 | Community Development | TN | $168,373,829Large | 94.34 |
| Community Foundation of Henderson CountyEIN 56-1330792 | Community Development | NC | $4,826,345Mid-sized | 95.17 |
| Community Foundation of Middle TennesseeEIN 62-1471789 | Community Development | TN | $53,539,306Large | 93.67 |
| Community Foundation of New JerseyEIN 22-2281783 | Community Development | NJ | $61,663,141Large | 98.03 |
| Community Foundation Sonoma CountyEIN 68-0003212 | Community Development | CA | $17,422,939Large | 91.20 |
| Community Harvest Food Bank of Northeast IndianaEIN 31-1100607 | Human Services | IN | $22,984,466Large | 93.24 |
| Community Involved in Sustaining AgricultureEIN 04-3416862 | Community Development | MA | $1,375,996Small | 91.17 |
| Community LINCEIN 43-1506591 | Human Services | MO | $2,171,516Small | 94.61 |
| Community Nurse Health CenterEIN 36-2170869 | Health | IL | $5,230,602Mid-sized | 90.78 |
| Community Partners InternationalEIN 94-3375666 | International | CA | $4,237,240Mid-sized | 96.09 |
| Community Partners of DallasEIN 75-2468034 | Human Services | TX | $2,648,851Small | 90.48 |
| Community Partnership for Arts and CultureEIN 34-1936190 | Arts, Culture, Humanities | OH | $1,160,326Small | 92.26 |
| Community Partnership SchoolEIN 20-3195763 | Education | PA | $2,868,551Small | 90.14 |
| Community Radio for Northern ColoradoEIN 84-1577682 | Arts, Culture, Humanities | CO | $3,499,725Small | 93.09 |
| Community Service Society of New YorkEIN 13-5562202 | Human Services | NY | $33,421,644Large | 91.66 |
| Community Services LeagueEIN 43-0976396 | Community Development | MO | $4,567,724Mid-sized | 91.31 |
| Community Soup Kitchen and Outreach Center Inc.EIN 22-3084025 | Human Services | NJ | $2,057,642Small | 90.43 |
| Community StorehouseEIN 75-1929755 | Human Services | TX | $2,823,875Small | 91.69 |
| Community TableEIN 74-2250374 | Human Services | CO | $3,112,316Small | 92.29 |
| Community Transportation NetworkEIN 35-2109955 | Human Services | IN | $1,291,221Small | 94.81 |
| Community Voices Heard (CVH)EIN 13-3901997 | Community Development | NY | $1,562,711Small | 94.72 |
| Community Volunteers in Medicine EIN 23-2944553 | Health | PA | $7,788,662Mid-sized | 100.00 |
| Compassion & ChoicesEIN 84-1328829 | Human and Civil Rights | CO | $14,808,739Large | 96.56 |
| Compassionate Care ALSEIN 04-3567819 | Health | MA | $1,330,284Small | 93.12 |
| CompassPoint Nonprofit ServicesEIN 93-1196632 | Community Development | CA | $3,901,504Mid-sized | 90.56 |
| Concern Worldwide US, Inc.EIN 13-3712030 | International | NY | $42,569,967Large | 90.91 |
| Concerns of Police SurvivorsEIN 52-1354370 | Human Services | MO | $4,382,937Mid-sized | 92.22 |
| Conexión AméricasEIN 62-1715618 | Human Services | TN | $2,437,718Small | 91.45 |
| Congressional Medal of Honor FoundationEIN 25-1828488 | Human and Civil Rights | VA | $4,580,569Mid-sized | 100.00 |
| Connecticut Audubon SocietyEIN 06-0653531 | Environment | CT | $3,731,785Mid-sized | 94.19 |
| Connecticut Food BankEIN 06-1063025 | Human Services | CT | $48,839,774Large | 91.03 |
| Connecticut Fund for the EnvironmentEIN 06-0990195 | Environment | CT | $3,663,406Mid-sized | 92.37 |
| Connecticut LandmarksEIN 06-0789151 | Arts, Culture, Humanities | CT | $1,955,963Small | 90.31 |
| Connecticut Voices for ChildrenEIN 06-1435280 | Human Services | CT | $1,151,496Small | 90.86 |
| Connections for Abused Women and their ChildrenEIN 36-2950380 | Human Services | IL | $1,833,855Small | 94.58 |
| Conquer Cancer Foundation of the American Society of Clinical OncologyEIN 31-1667995 | Health | VA | $27,245,874Large | 95.85 |
| Conservancy of Southwest FloridaEIN 59-1157084 | Environment | FL | $8,102,079Mid-sized | 93.89 |
| Conservation Colorado Education FundEIN 84-0614285 | Environment | CO | $1,902,201Small | 92.20 |
| Conservation Foundation of the Gulf CoastEIN 20-0345249 | Environment | FL | $1,097,099Small | 95.85 |
| Conservation InternationalEIN 52-1497470 | Environment | VA | $149,806,220Large | 95.88 |
| Conservation Lands FoundationEIN 20-8924520 | Environment | CO | $7,028,672Mid-sized | 94.33 |
| Conservation Law FoundationEIN 04-6149986 | Environment | MA | $9,439,409Mid-sized | 91.21 |
| Constitutional Accountability CenterEIN 52-2063854 | Research and Public Policy | DC | $3,469,685Small | 91.86 |
| Contemporary Art Museum St. LouisEIN 43-1202816 | Arts, Culture, Humanities | MO | $2,732,507Small | 91.49 |
| Convoy of HopeEIN 68-0051386 | Human Services | MO | $157,932,066Large | 96.46 |
| Cookson Hills Christian SchoolEIN 73-0665495 | Human Services | OK | $2,958,651Small | 92.26 |
| Cooperative for EducationEIN 31-1545464 | International | OH | $3,509,251Mid-sized | 91.38 |
| Coptic OrphansEIN 54-1637257 | International | VA | $7,447,158Mid-sized | 93.15 |
| Coral Reef AllianceEIN 94-3211245 | Environment | CA | $3,119,480Small | 92.03 |
| Cornerstone Assistance NetworkEIN 75-2417646 | Human Services | TX | $3,311,773Small | 94.79 |
| Cornucopia Institute IncorporatedEIN 20-1075143 | Education | WI | $937,760Small | 94.57 |
| Corporate AccountabilityEIN 41-1322686 | Human and Civil Rights | MA | $6,385,613Mid-sized | 93.30 |