| Women's Lunch PlaceEIN 22-2514148 | Human Services | MA | $2,943,376Small | 88.22 |
| Women's Resources of Monroe CountyEIN 23-2141496 | Human Services | PA | $1,383,184Small | 80.46 |
| Women's Sports FoundationEIN 23-7380557 | Human Services | NY | $3,349,280Small | 92.93 |
| Women's WayEIN 23-1989161 | Human Services | PA | $744,362Small | 85.13 |
| WomenHeart: The National Coalition for Women with Heart DiseaseEIN 52-2148006 | Health | DC | $4,265,378Mid-sized | 85.16 |
| Womens International Zionist Organization USAEIN 13-3041381 | International | NY | $5,318,264Mid-sized | 88.21 |
| Womens Media CenterEIN 38-3727585 | Human and Civil Rights | DC | $1,501,847Small | 86.74 |
| Woodlawn FoundationEIN 13-3055729 | Community Development | NY | $17,995,143Large | 93.00 |
| Woodmere Art MuseumEIN 23-1381459 | Arts, Culture, Humanities | PA | $2,995,647Small | 94.69 |
| Woodrow Wilson International Center for ScholarsEIN 52-1067541 | Research and Public Policy | DC | $23,108,789Large | 90.34 |
| Woodrow Wilson National Fellowship FoundationEIN 21-0703075 | Education | NJ | $24,168,314Large | 87.50 |
| Woods Hole Oceanographic InstitutionEIN 04-2105850 | Research and Public Policy | MA | $236,368,081Large | 92.95 |
| Woods Hole Research CenterEIN 04-3005094 | Research and Public Policy | MA | $8,861,257Mid-sized | 84.80 |
| Woods Humane SocietyEIN 95-2058587 | Animals | CA | $2,484,537Small | 95.05 |
| Woodstock Farm Animal SanctuaryEIN 20-1552990 | Animals | NY | $1,906,731Small | 82.49 |
| Worcester Art MuseumEIN 04-1988530 | Arts, Culture, Humanities | MA | $10,758,445Mid-sized | 84.14 |
| Worcester County Food BankEIN 04-3071457 | Human Services | MA | $12,444,808Mid-sized | 93.42 |
| Worcester County Horticultural SocietyEIN 04-1988945 | Environment | MA | $3,644,678Mid-sized | 81.83 |
| Word of Life FellowshipEIN 13-5648615 | Religion | NY | $47,064,537Large | 93.21 |
| Working WardrobesEIN 33-0669145 | Education | CA | $4,227,482Mid-sized | 87.65 |
| World Affairs Council of Dallas/Fort WorthEIN 75-0855628 | International | TX | $2,429,418Small | 80.44 |
| World Affairs Council of Northern CaliforniaEIN 94-1156356 | International | CA | $3,655,597Mid-sized | 83.42 |
| World Affairs Council of SeattleEIN 91-0586924 | International | WA | $974,714Small | 81.62 |
| World Animal ProtectionEIN 04-2718182 | Animals | NY | $5,375,719Mid-sized | 80.55 |
| World Bible SchoolEIN 74-2254797 | Religion | TX | $3,052,912Small | 74.64 |
| World Bicycle ReliefEIN 20-5080679 | International | IL | $9,162,450Mid-sized | 84.35 |
| World Business ChicagoEIN 36-4313685 | Community Development | IL | $12,006,180Mid-sized | 86.90 |
| World CareEIN 86-0830973 | International | AZ | $1,335,952Small | 80.12 |
| World Childhood FoundationEIN 16-1559586 | International | NY | $1,956,732Small | 78.77 |
| World Christian BroadcastingEIN 75-1541354 | Religion | TN | $3,483,492Small | 89.67 |
| World Compassion Terry Law MinistriesEIN 73-0934739 | Religion | OK | $2,545,146Small | 84.52 |
| World EducationEIN 13-1804349 | International | MA | $48,607,047Large | 87.25 |
| World Emergency ReliefEIN 95-4014743 | International | CA | $23,969,741Large | 83.97 |
| World Environment CenterEIN 13-3100197 | Research and Public Policy | DC | $2,665,851Small | 88.39 |
| World Food Program USAEIN 13-3843435 | International | DC | $17,450,941Large | 85.41 |
| World Forestry CenterEIN 93-6034757 | Environment | OR | $2,177,341Small | 89.70 |
| World HelpEIN 54-1615454 | International | VA | $35,916,092Large | 88.43 |
| World Hope InternationalEIN 35-1985485 | International | VA | $19,235,029Large | 92.92 |
| World Indigenous MissionsEIN 74-2192909 | Religion | TX | $1,734,210Small | 86.49 |
| World Institute on DisabilityEIN 94-2911623 | Research and Public Policy | CA | $2,330,200Small | 89.50 |
| World Link MinistriesEIN 93-1135565 | Religion | TX | $1,750,645Small | 80.98 |
| World MAPEIN 95-3711613 | Religion | AZ | $646,460Small | 69.38 |
| World Medical ReliefEIN 38-1575570 | International | MI | $30,348,974Large | 92.73 |
| World MissionEIN 38-3213457 | Religion | MI | $2,734,899Small | 88.46 |
| World Missionary PressEIN 35-1076405 | Religion | IN | $4,631,966Mid-sized | 91.39 |
| World Monuments FundEIN 13-2571900 | Arts, Culture, Humanities | NY | $12,445,266Mid-sized | 85.92 |
| World NeighborsEIN 73-0707328 | International | OK | $3,484,562Small | 90.97 |
| World OrphansEIN 33-0571309 | International | CO | $3,179,482Small | 93.91 |
| World Outreach Ministry FoundationEIN 91-1609811 | Religion | WA | $1,141,894Small | 81.78 |
| World Pediatric ProjectEIN 54-1953305 | International | VA | $8,680,295Mid-sized | 91.00 |
| World Pulse VoicesEIN 41-2065177 | International | OR | $2,227,830Small | 84.05 |
| World Radio NetworkEIN 74-2240000 | Religion | TX | $2,686,213Small | 85.65 |
| World ReliefEIN 23-6393344 | International | MD | $76,751,245Large | 91.20 |
| World Resources InstituteEIN 52-1257057 | Environment | DC | $94,564,842Large | 95.47 |
| World Science FestivalEIN 43-2095418 | Arts, Culture, Humanities | NY | $5,725,616Mid-sized | 75.87 |
| World ServantsEIN 59-2707198 | Religion | MN | $1,139,165Small | 79.62 |
| World Sport ChicagoEIN 20-8845277 | Human Services | IL | $1,138,998Small | 73.12 |
| World VisionEIN 95-1922279 | International | WA | $999,702,678Large | 86.15 |
| World Youth AllianceEIN 13-4196230 | Human and Civil Rights | NY | $867,715Small | 80.68 |
| Worldserve InternationalEIN 43-1535009 | International | MO | $3,949,288Mid-sized | 87.25 |