| Reasons to BelieveEIN 33-0168048 | Religion | CA | $4,804,284Mid-sized | 90.16 |
| Rebecca FarmEIN 81-0530627 | Human Services | MT | $1,419,605Small | 51.62 |
| Rebuilding TogetherEIN 52-1585880 | Community Development | DC | $12,052,499Mid-sized | 91.81 |
| Rebuilding Together HoustonEIN 76-0027902 | Community Development | TX | $3,435,119Small | 90.91 |
| Rebuilding Together PeninsulaEIN 94-3106209 | Community Development | CA | $2,140,867Small | 93.77 |
| Rebuilding Together Silicon ValleyEIN 77-0289381 | Community Development | CA | $1,758,363Small | 96.66 |
| Reciprocal Ministries InternationalEIN 65-0062156 | International | FL | $2,983,099Small | 86.44 |
| Reconciliation OutreachEIN 75-2192081 | Human Services | TX | $1,096,220Small | 81.59 |
| Red Hook InitiativeEIN 20-3904662 | Human Services | NY | $3,007,954Small | 90.14 |
| Red Mountain Theatre CompanyEIN 58-1994417 | Arts, Culture, Humanities | AL | $3,275,879Small | 90.58 |
| REDFEIN 54-2132153 | Human Services | CA | $13,282,944Mid-sized | 95.33 |
| RedRoverEIN 68-0124097 | Animals | CA | $2,614,195Small | 96.95 |
| Redwood Gospel MissionEIN 94-6122045 | Human Services | CA | $4,461,133Mid-sized | 82.34 |
| Redwood Library & AthenaeumEIN 05-0260678 | Arts, Culture, Humanities | RI | $2,161,062Small | 75.43 |
| Regional Food Bank of OklahomaEIN 73-1100380 | Human Services | OK | $84,517,598Large | 92.65 |
| Regional Parks FoundationEIN 23-7011877 | Environment | CA | $1,649,524Small | 90.50 |
| Regional Plan AssociationEIN 13-1624154 | Community Development | NY | $5,371,595Mid-sized | 89.27 |
| Regional Trail CorporationEIN 25-1660116 | Environment | PA | $874,198Small | 83.96 |
| Regional YMCA of Western ConnecticutEIN 06-6051610 | Human Services | CT | $7,073,577Mid-sized | 78.68 |
| Rehabilitation Center for Children and AdultsEIN 59-0791037 | Health | FL | $2,835,023Small | 88.29 |
| Rehearsal for Life, Inc. (Urban Improv/Freelance)EIN 04-2786576 | Arts, Culture, Humanities | MA | $1,335,032Small | 81.24 |
| Reid Park Zoological SocietyEIN 94-2379052 | Animals | AZ | $4,017,037Mid-sized | 91.16 |
| Relevant RadioEIN 39-2003067 | Religion | WI | $14,340,533Large | 89.16 |
| Relief Nursery, Inc.EIN 93-0784800 | Human Services | OR | $3,472,400Small | 92.18 |
| Religions for PeaceEIN 13-2671065 | International | NY | $3,293,909Small | 89.00 |
| Religious Coalition for Reproductive ChoiceEIN 52-1213972 | Human and Civil Rights | DC | $1,405,840Small | 86.62 |
| Religious Community ServicesEIN 59-1309186 | Human Services | FL | $9,886,130Mid-sized | 91.45 |
| Remember NhuEIN 20-1461313 | International | OH | $3,695,880Mid-sized | 83.64 |
| Renewal MinistriesEIN 38-2385975 | Religion | MI | $1,737,697Small | 80.38 |
| Reporters Committee for Freedom of the PressEIN 52-0972043 | Human and Civil Rights | DC | $1,982,840Small | 91.90 |
| Rescue Mission of El PasoEIN 74-6062443 | Human Services | TX | $1,764,164Small | 90.12 |
| Rescue Mission of Middle GeorgiaEIN 58-6011446 | Human Services | GA | $2,723,506Small | 96.07 |
| Rescue Mission of RoanokeEIN 54-0573900 | Human Services | VA | $4,755,474Mid-sized | 90.54 |
| Rescue Mission of TrentonEIN 21-0656182 | Human Services | NJ | $5,128,473Mid-sized | 90.92 |
| Rescue Mission, SyracuseEIN 15-0532146 | Human Services | NY | $21,139,953Large | 84.75 |
| Research for ActionEIN 23-2710950 | Education | PA | $4,017,176Mid-sized | 89.27 |
| Research!AmericaEIN 52-1609875 | Research and Public Policy | VA | $3,687,258Mid-sized | 80.61 |
| ResistEIN 04-2433182 | Human and Civil Rights | MA | $1,238,224Small | 73.64 |
| ReSOURCEEIN 03-0326293 | Human Services | VT | $4,244,228Mid-sized | 88.17 |
| Resource and Crisis Center of Galveston CountyEIN 76-0121011 | Human Services | TX | $2,645,730Small | 91.88 |
| Resource Center EIN 75-1892059 | Health | TX | $7,437,379Mid-sized | 95.63 |
| Resource CentralEIN 84-0808982 | Environment | CO | $2,340,605Small | 92.51 |
| Resource Exchange International (REI)EIN 59-3043334 | International | CO | $959,270Small | 80.80 |
| Resource MediaEIN 82-0564961 | Arts, Culture, Humanities | CA | $4,243,281Mid-sized | 87.20 |
| Resources for the FutureEIN 53-0220900 | Environment | DC | $13,755,089Large | 89.69 |
| Resourcing Christian Education InternationalEIN 57-1154204 | Religion | IL | $6,823,625Mid-sized | 93.91 |
| Respiratory Health AssociationEIN 36-2222687 | Health | IL | $2,776,205Small | 81.10 |
| Respite Care, Inc.EIN 84-0840653 | Health | CO | $1,583,988Small | 84.23 |
| reStartEIN 43-1349378 | Human Services | MO | $6,716,944Mid-sized | 90.58 |
| Restavek FreedomEIN 20-8334578 | International | OH | $2,310,841Small | 100.00 |
| Restless Legs Syndrome FoundationEIN 56-1784846 | Health | TX | $907,448Small | 91.16 |
| Restoration MinistriesEIN 36-3552070 | Human Services | IL | $2,526,753Small | 92.27 |
| Restore Hope MinistriesEIN 73-1037026 | Human Services | OK | $1,208,768Small | 91.55 |
| RESULTS Educational FundEIN 95-3747267 | Research and Public Policy | DC | $12,042,341Mid-sized | 92.82 |
| Retina Foundation of the SouthwestEIN 51-0151514 | Health | TX | $3,799,510Mid-sized | 92.62 |
| Rett Syndrome Research TrustEIN 26-0687439 | Health | CT | $7,443,444Mid-sized | 82.96 |
| Return to FreedomEIN 06-1484961 | Animals | CA | $1,508,448Small | 84.69 |
| ReVive Center for Housing and HealingEIN 36-2192804 | Human Services | IL | $2,298,503Small | 85.05 |
| Reynolda House Museum of American ArtEIN 56-0810676 | Arts, Culture, Humanities | NC | $4,647,945Mid-sized | 89.12 |
| Rheumatology Research FoundationEIN 58-1654301 | Health | GA | $14,033,568Large | 92.22 |