| Wildlife AllianceEIN 52-1934148 | Animals | NY | $3,840,675Mid-sized | 87.25 |
| Wildlife Center of VirginiaEIN 54-1215402 | Animals | VA | $1,633,864Small | 91.19 |
| Wildlife Conservation NetworkEIN 30-0108469 | Animals | CA | $17,484,055Large | 98.23 |
| Wildlife Conservation SocietyEIN 13-1740011 | Animals | NY | $265,855,513Large | 91.96 |
| Wildlife ForeverEIN 36-3566121 | Animals | MN | $1,604,562Small | 81.64 |
| Wildlife Habitat CouncilEIN 52-1558579 | Animals | MD | $2,667,141Small | 80.68 |
| Wildlife Rescue & RehabilitationEIN 74-2012897 | Animals | TX | $2,479,942Small | 95.13 |
| Wildlife WaystationEIN 95-3190812 | Animals | CA | $2,480,349Small | 76.02 |
| Wilkinson CenterEIN 75-2712117 | Human Services | TX | $2,277,173Small | 89.88 |
| Will Rogers Motion Picture Pioneers FoundationEIN 15-0533551 | Health | CA | $4,754,907Mid-sized | 83.68 |
| William Temple HouseEIN 93-0559964 | Human Services | OR | $2,146,769Small | 92.33 |
| Williamstown Theatre FestivalEIN 04-2237311 | Arts, Culture, Humanities | MA | $4,233,168Mid-sized | 85.00 |
| WiNGSEIN 75-0800699 | Human Services | TX | $4,682,777Mid-sized | 87.82 |
| WINGS for KidsEIN 57-1055054 | Human Services | SC | $4,966,602Mid-sized | 94.59 |
| Wings of HopeEIN 43-0909606 | International | MO | $2,733,985Small | 89.02 |
| Wings Over the Rockies Air & Space MuseumEIN 84-0931491 | Arts, Culture, Humanities | CO | $3,788,929Mid-sized | 82.35 |
| WINGS Program, Inc.EIN 36-3456061 | Human Services | IL | $5,380,674Mid-sized | 92.95 |
| Winning At HomeEIN 38-3234306 | Religion | MI | $1,702,192Small | 72.66 |
| Winston-Salem Rescue MissionEIN 56-0891921 | Human Services | NC | $2,977,443Small | 84.84 |
| Winston-Salem SymphonyEIN 56-0692826 | Arts, Culture, Humanities | NC | $2,775,018Small | 75.43 |
| Wiregrass United WayEIN 63-6000270 | Community Development | AL | $3,049,842Small | 83.42 |
| Wisconsin Chamber OrchestraEIN 39-6078526 | Arts, Culture, Humanities | WI | $2,115,042Small | 79.80 |
| Wisconsin Historical Foundation, Inc.EIN 39-0921093 | Arts, Culture, Humanities | WI | $5,089,058Mid-sized | 81.81 |
| Wisconsin Humane SocietyEIN 39-0810533 | Animals | WI | $9,223,669Mid-sized | 88.90 |
| Wisconsin Public Radio AssociationEIN 23-7363536 | Arts, Culture, Humanities | WI | $9,045,462Mid-sized | 82.91 |
| Wisconsin Women's Health FoundationEIN 39-1900678 | Health | WI | $2,261,658Small | 90.94 |
| Wishing Well Foundation USAEIN 72-1297795 | Health | LA | $707,871Small | 14.48 |
| WITFEIN 23-1629016 | Arts, Culture, Humanities | PA | $11,486,151Mid-sized | 86.18 |
| With Love From Jesus MinistriesEIN 56-2271441 | Human Services | NC | $1,776,580Small | 77.86 |
| WITNESSEIN 13-4167155 | International | NY | $3,440,023Small | 83.13 |
| WJCTEIN 59-0711482 | Arts, Culture, Humanities | FL | $4,338,648Mid-sized | 89.67 |
| WKNOEIN 62-0525567 | Arts, Culture, Humanities | TN | $5,231,595Mid-sized | 87.36 |
| WLMB-TV 40EIN 34-1676969 | Religion | OH | $1,581,449Small | 58.43 |
| WMFEEIN 59-6155012 | Arts, Culture, Humanities | FL | $3,865,157Mid-sized | 91.35 |
| WMHT Educational TelecommunicationsEIN 14-1400177 | Arts, Culture, Humanities | NY | $8,528,602Mid-sized | 84.54 |
| WMNFEIN 59-1619213 | Arts, Culture, Humanities | FL | $1,625,680Small | 84.13 |
| WNETEIN 26-2810489 | Arts, Culture, Humanities | NY | $131,298,216Large | 90.37 |
| Wolf Haven InternationalEIN 91-1185727 | Animals | WA | $1,155,566Small | 79.76 |
| Wolf River ConservancyEIN 62-1245975 | Environment | TN | $1,172,502Small | 86.64 |
| Wolf Trap Foundation for the Performing ArtsEIN 23-7011544 | Arts, Culture, Humanities | VA | $36,931,309Large | 93.20 |
| Wolfpack ClubEIN 56-0650623 | Education | NC | $23,648,439Large | 89.62 |
| WomankindEIN 51-0168651 | Health | OH | $1,621,581Small | 73.07 |
| Women at Risk InternationalEIN 77-0664609 | International | MI | $2,921,136Small | 89.87 |
| Women EmployedEIN 36-2969526 | Human Services | IL | $2,349,519Small | 82.37 |
| Women for Women InternationalEIN 52-1838756 | International | DC | $21,770,442Large | 78.10 |
| Women In Distress of Broward CountyEIN 59-1592524 | Human Services | FL | $5,537,711Mid-sized | 88.69 |
| Women in Government FoundationEIN 54-1527192 | Research and Public Policy | DC | $2,114,054Small | 77.37 |
| Women of Tomorrow Mentor & Scholarship ProgramEIN 65-0862995 | Human Services | FL | $1,685,133Small | 91.53 |
| Women's and Children's AllianceEIN 82-0204464 | Human Services | ID | $2,546,250Small | 93.93 |
| Women's Bean ProjectEIN 84-1144973 | Human Services | CO | $1,380,348Small | 75.35 |
| Women's Business Development CenterEIN 36-3488628 | Community Development | IL | $4,138,715Mid-sized | 94.13 |
| Women's Care CenterEIN 35-1609945 | Health | IN | $6,642,531Mid-sized | 76.66 |
| Women's Center & Shelter of Greater PittsburghEIN 25-1264376 | Human Services | PA | $4,529,250Mid-sized | 90.96 |
| Women's Community Revitalization ProjectEIN 22-2840188 | Community Development | PA | $1,564,412Small | 93.14 |
| Women's Foundation for A Greater MemphisEIN 58-2207247 | Human and Civil Rights | TN | $2,038,760Small | 90.92 |
| Women's Funding AllianceEIN 91-1244815 | Human and Civil Rights | WA | $1,782,193Small | 79.06 |
| Women's Funding NetworkEIN 41-1685134 | Human and Civil Rights | CA | $1,539,286Small | 86.07 |
| Women's Law ProjectEIN 23-7354667 | Human and Civil Rights | PA | $1,116,238Small | 80.99 |
| Women's Learning PartnershipEIN 52-2199581 | International | MD | $1,749,613Small | 91.36 |
| Women's Link WorldwideEIN 03-0371141 | Human and Civil Rights | NY | $2,329,429Small | 81.15 |