| Animal HavenEIN 11-6101487 | Animals | NY | $1,903,122Small | 77.82 |
| Animal PlaceEIN 68-0200668 | Animals | CA | $2,235,453Small | 84.44 |
| Animal Protective Association of MissouriEIN 43-0699783 | Animals | MO | $2,515,712Small | 92.72 |
| Animal Recovery MissionEIN 30-0602348 | Animals | FL | $1,603,555Small | 55.69 |
| Animal Refuge LeagueEIN 01-0212541 | Animals | ME | $2,983,991Small | 86.09 |
| Animal Rescue League of Berks County, Inc.EIN 23-1417505 | Animals | PA | $2,025,484Small | 91.92 |
| Animal Rescue, Inc.EIN 23-2180310 | Animals | PA | $1,099,219Small | 89.51 |
| Animal Welfare AssociationEIN 22-1752792 | Animals | NJ | $3,186,672Small | 91.71 |
| Animal Welfare InstituteEIN 13-5655952 | Animals | DC | $2,737,309Small | 92.92 |
| Animal Welfare League of AlexandriaEIN 54-0796610 | Animals | VA | $2,882,177Small | 90.45 |
| Animal Welfare League of ArlingtonEIN 54-0603502 | Animals | VA | $3,195,704Small | 91.63 |
| Animal Welfare SocietyEIN 23-7018176 | Animals | ME | $3,126,373Small | 95.22 |
| Animals Asia Foundation LimitedEIN 31-1802788 | Animals | CA | $1,598,112Small | 86.12 |
| Animals' AngelsEIN 20-8780367 | Animals | MD | $906,993Small | 83.65 |
| Any Baby Can of San AntonioEIN 74-2684333 | Health | TX | $3,063,243Small | 90.32 |
| AORN FoundationEIN 84-1193583 | Health | CO | $1,800,377Small | 87.08 |
| APhA FoundationEIN 52-6039142 | Research and Public Policy | DC | $1,640,653Small | 73.17 |
| Apollo's FireEIN 34-1696842 | Arts, Culture, Humanities | OH | $1,874,985Small | 86.54 |
| Appalachian VoicesEIN 56-2049956 | Environment | NC | $2,237,713Small | 100.00 |
| AppalshopEIN 61-0890210 | Arts, Culture, Humanities | KY | $1,747,193Small | 81.02 |
| Appeal of Conscience FoundationEIN 52-6062870 | International | NY | $2,013,717Small | 86.70 |
| AppleseedEIN 52-1835698 | Human and Civil Rights | DC | $1,074,765Small | 77.73 |
| Arboretum FoundationEIN 91-0613583 | Environment | WA | $1,228,490Small | 77.79 |
| Archaeology SouthwestEIN 86-0640183 | Arts, Culture, Humanities | AZ | $1,591,501Small | 92.92 |
| Arctic Barnabas MinistriesEIN 92-0172389 | Religion | AK | $1,115,575Small | 77.91 |
| Areivim Philanthropic GroupEIN 20-8024537 | Community Development | NY | $1,236,719Small | 80.54 |
| Ariel MinistriesEIN 74-1930400 | Religion | TX | $2,257,189Small | 58.03 |
| Arizona Hemophilia AssociationEIN 86-0209257 | Health | AZ | $2,299,635Small | 82.00 |
| Arizona Women's Education and EmploymentEIN 86-0412509 | Human Services | AZ | $2,252,823Small | 73.68 |
| Arkansas Sheriffs' Youth RanchesEIN 71-0471266 | Human Services | AR | $2,273,259Small | 83.59 |
| Arkansas Single Parent Scholarship Fund ProgramEIN 71-0704088 | Education | AR | $2,294,632Small | 89.38 |
| Arkansas Symphony OrchestraEIN 71-6059542 | Arts, Culture, Humanities | AR | $3,232,760Small | 81.79 |
| Arm In ArmEIN 22-3198464 | Human Services | NJ | $2,461,297Small | 95.29 |
| Armenian Relief and Development Association (ARDA)EIN 23-7089113 | International | CA | $863,730Small | 66.81 |
| 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 |
| ArtownEIN 88-0412311 | Arts, Culture, Humanities | NV | $2,366,755Small | 82.15 |
| 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 |
| ArtsMemphisEIN 62-0693547 | Arts, Culture, Humanities | TN | $2,744,068Small | 84.63 |
| 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 |
| Asheville Humane SocietyEIN 56-1444098 | Animals | NC | $2,850,394Small | 88.80 |
| 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 Pacific Environmental NetworkEIN 94-3261846 | Community Development | CA | $3,144,534Small | 94.96 |
| 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 Public RadioEIN 84-0884901 | Arts, Culture, Humanities | CO | $1,385,426Small | 91.48 |
| Assistance League of AustinEIN 23-7307276 | Human Services | TX | $1,215,984Small | 96.46 |