| Arnold P. Gold FoundationEIN 22-3052098 | Health | NJ | $3,827,468Mid-sized | 83.93 |
| Art21EIN 13-3920288 | Arts, Culture, Humanities | NY | $1,637,213Small | 83.37 |
| Arthritis National Research FoundationEIN 95-6043953 | Health | CA | $1,670,093Small | 97.63 |
| Arthur Ashe Institute for Urban HealthEIN 11-3185372 | Health | NY | $2,988,538Small | 90.43 |
| Artist TrustEIN 91-1353974 | Arts, Culture, Humanities | WA | $1,209,733Small | 84.06 |
| Artists Association of NantucketEIN 04-2458501 | Arts, Culture, Humanities | MA | $1,323,723Small | 77.40 |
| Artists For HumanityEIN 04-3138434 | Education | MA | $4,213,389Mid-sized | 91.59 |
| Artis—NaplesEIN 59-2322926 | Arts, Culture, Humanities | FL | $30,005,832Large | 94.36 |
| ArtownEIN 88-0412311 | Arts, Culture, Humanities | NV | $2,366,755Small | 82.15 |
| Arts & Science CouncilEIN 56-0693436 | Arts, Culture, Humanities | NC | $14,255,071Large | 84.22 |
| Arts and Education CouncilEIN 43-0790672 | Arts, Culture, Humanities | MO | $2,247,136Small | 79.45 |
| Arts Council of PrincetonEIN 22-6108090 | Education | NJ | $1,693,338Small | 82.53 |
| Arts Empowering LifeEIN 04-3017097 | Arts, Culture, Humanities | MA | $1,419,653Small | 73.83 |
| Arts for LearningEIN 65-1141598 | Education | FL | $1,549,667Small | 88.01 |
| Arts HorizonsEIN 22-2418718 | Arts, Culture, Humanities | NJ | $1,315,609Small | 76.47 |
| Arts Partnership of Greater SpartanburgEIN 57-0986224 | Arts, Culture, Humanities | SC | $3,298,407Small | 87.41 |
| ArtsBuildEIN 23-7005188 | Arts, Culture, Humanities | TN | $2,224,425Small | 83.89 |
| ArtsFundEIN 91-0839644 | Arts, Culture, Humanities | WA | $4,268,874Mid-sized | 84.31 |
| ArtsinStarkEIN 34-6609771 | Arts, Culture, Humanities | OH | $3,656,120Mid-sized | 90.51 |
| ArtsMemphisEIN 62-0693547 | Arts, Culture, Humanities | TN | $2,744,068Small | 84.63 |
| Artspace ProjectsEIN 41-1350071 | Arts, Culture, Humanities | MN | $35,730,629Large | 89.48 |
| ArtsWaveEIN 31-0537138 | Arts, Culture, Humanities | OH | $14,978,630Large | 84.38 |
| ArtWorksEIN 31-1665900 | Arts, Culture, Humanities | OH | $2,876,819Small | 85.04 |
| As You SowEIN 94-3169008 | Environment | CA | $3,355,158Small | 93.98 |
| ASAP MinistriesEIN 38-3256028 | Religion | MI | $2,207,626Small | 94.81 |
| Asha for EducationEIN 77-0459884 | International | CA | $4,482,209Mid-sized | 100.00 |
| Asheville Area Habitat for HumanityEIN 56-1363464 | Community Development | NC | $5,325,322Mid-sized | 92.74 |
| Asheville Humane SocietyEIN 56-1444098 | Animals | NC | $2,850,394Small | 88.80 |
| AshokaEIN 51-0255908 | International | VA | $20,517,822Large | 86.51 |
| Asia SocietyEIN 13-3234632 | International | NY | $31,773,102Large | 85.53 |
| Asia Society Texas CenterEIN 03-0433949 | International | TX | $3,684,041Mid-sized | 85.71 |
| Asian & Pacific Islander American Scholarship FundEIN 57-1192973 | Education | DC | $20,152,919Large | 89.92 |
| Asian AccessEIN 95-6120630 | Religion | CA | $3,416,805Small | 85.14 |
| Asian American Journalists AssociationEIN 95-3755203 | Human and Civil Rights | CA | $1,489,753Small | 78.54 |
| Asian Americans Advancing JusticeEIN 13-3619000 | Human and Civil Rights | DC | $3,121,510Small | 86.67 |
| Asian Americans Advancing Justice Los AngelesEIN 95-3854152 | Human and Civil Rights | CA | $13,833,697Large | 92.02 |
| Asian Pacific Environmental NetworkEIN 94-3261846 | Community Development | CA | $3,144,534Small | 94.96 |
| Asolo Repertory TheatreEIN 59-2717909 | Arts, Culture, Humanities | FL | $10,230,950Mid-sized | 92.16 |
| Aspen Art MuseumEIN 84-0746671 | Arts, Culture, Humanities | CO | $8,042,966Mid-sized | 84.00 |
| Aspen Center for Environmental StudiesEIN 23-7042291 | Environment | CO | $2,368,811Small | 92.33 |
| Aspen Historical SocietyEIN 84-6037756 | Arts, Culture, Humanities | CO | $1,146,943Small | 81.10 |
| Aspen Music Festival and SchoolEIN 84-0445087 | Arts, Culture, Humanities | CO | $19,427,693Large | 91.83 |
| Aspen Public RadioEIN 84-0884901 | Arts, Culture, Humanities | CO | $1,385,426Small | 91.48 |
| Assist InternationalEIN 77-0243475 | International | CA | $10,659,223Mid-sized | 90.71 |
| Assistance League of AustinEIN 23-7307276 | Human Services | TX | $1,215,984Small | 96.46 |
| Associated Humane SocietiesEIN 22-1487122 | Animals | NJ | $8,768,744Mid-sized | 81.38 |
| Associated Services for the Blind and Visually ImpairedEIN 23-1370508 | Human Services | PA | $3,718,143Mid-sized | 78.35 |
| Association for Enterprise OpportunityEIN 36-3834357 | Community Development | DC | $2,163,035Small | 92.20 |
| Association for India's DevelopmentEIN 04-3652609 | International | MD | $2,380,339Small | 100.00 |
| Association for the Colonial TheatreEIN 23-2846336 | Arts, Culture, Humanities | PA | $1,266,587Small | 90.34 |
| Association of Gospel Rescue Missions dba Citygate NetworkEIN 55-0479715 | Human Services | CO | $2,050,377Small | 90.53 |
| Association of Graduates of the United States Air Force AcademyEIN 84-0580665 | Education | CO | $10,905,692Mid-sized | 95.45 |
| Association of Performing Arts ProfessionalsEIN 39-1131995 | Arts, Culture, Humanities | DC | $5,793,329Mid-sized | 93.91 |
| Association of Reproductive Health ProfessionalsEIN 52-1591381 | Health | DC | $1,538,776Small | 85.38 |
| Association of Waldorf Schools of North AmericaEIN 23-2083226 | Education | CO | $1,897,113Small | 83.06 |
| Association on American Indian AffairsEIN 13-1623902 | Human Services | MD | $488,251Small | 77.23 |
| Association to Benefit ChildrenEIN 13-3303089 | Human Services | NY | $18,345,443Large | 96.61 |
| Asthma and Allergy Foundation of AmericaEIN 13-1691693 | Health | MD | $4,355,693Mid-sized | 82.37 |
| Astraea Lesbian Foundation for JusticeEIN 13-2992977 | Human and Civil Rights | NY | $10,279,723Mid-sized | 93.32 |
| ASU FoundationEIN 86-6051042 | Education | AZ | $123,638,324Large | 97.70 |