| myFaceEIN 13-6013760 | Health | NY | $3,618,719Mid-sized | 91.74 |
| Mystic SeaportEIN 06-0653120 | Arts, Culture, Humanities | CT | $19,600,119Large | 79.46 |
| N Street VillageEIN 52-1007373 | Human Services | DC | $7,693,664Mid-sized | 93.54 |
| NAACP Legal Defense and Educational FundEIN 13-1655255 | Human and Civil Rights | NY | $17,005,637Large | 92.31 |
| NAFEIN 13-3480246 | Education | NY | $19,066,788Large | 93.92 |
| NAFSA: Association of International EducatorsEIN 13-1878953 | International | DC | $21,484,112Large | 85.07 |
| Naismith Memorial Basketball Hall of FameEIN 04-6128892 | Arts, Culture, Humanities | MA | $10,289,678Mid-sized | 88.18 |
| NALEO Educational FundEIN 52-1212849 | Research and Public Policy | CA | $8,307,589Mid-sized | 86.84 |
| NAMIEIN 43-1201653 | Health | VA | $13,730,128Large | 93.26 |
| NAMI MinnesotaEIN 41-1317030 | Health | MN | $1,965,443Small | 92.36 |
| Nantucket AtheneumEIN 04-2104412 | Arts, Culture, Humanities | MA | $2,737,637Small | 88.11 |
| Nantucket Boys & Girls ClubEIN 04-6114678 | Human Services | MA | $2,259,695Small | 90.74 |
| Nantucket Community SailingEIN 04-3252612 | Human Services | MA | $1,239,796Small | 92.12 |
| Nantucket Historical AssociationEIN 04-6003451 | Arts, Culture, Humanities | MA | $5,456,879Mid-sized | 84.34 |
| Naples Botanical GardenEIN 65-0511429 | Environment | FL | $8,405,351Mid-sized | 87.78 |
| NARAL Pro-Choice America FoundationEIN 52-1100361 | Human and Civil Rights | DC | $7,808,947Mid-sized | 96.66 |
| Nashua Soup Kitchen & ShelterEIN 02-0359239 | Human Services | NH | $1,391,716Small | 85.31 |
| Nashville Humane AssociationEIN 62-0672999 | Animals | TN | $2,441,216Small | 93.86 |
| Nashville Inner City MinistryEIN 62-1274899 | Religion | TN | $1,784,500Small | 81.75 |
| Nashville OperaEIN 62-1119830 | Arts, Culture, Humanities | TN | $2,398,969Small | 80.53 |
| Nashville Public Education FoundationEIN 48-1266314 | Education | TN | $2,081,628Small | 91.31 |
| Nashville Public Library FoundationEIN 62-1681766 | Arts, Culture, Humanities | TN | $3,316,506Small | 91.78 |
| Nashville Public RadioEIN 62-1631652 | Arts, Culture, Humanities | TN | $4,962,835Mid-sized | 87.05 |
| Nashville Public TelevisionEIN 62-1740928 | Arts, Culture, Humanities | TN | $5,583,266Mid-sized | 87.37 |
| Nashville Repertory TheatreEIN 62-1811578 | Arts, Culture, Humanities | TN | $1,492,347Small | 73.69 |
| Nashville Rescue MissionEIN 45-2424130 | Human Services | TN | $13,880,937Large | 85.23 |
| Nashville SymphonyEIN 62-0550979 | Arts, Culture, Humanities | TN | $25,298,449Large | 89.42 |
| Nashville ZooEIN 62-1411210 | Animals | TN | $14,140,736Large | 98.99 |
| Nassau County Museum of ArtEIN 11-2949583 | Arts, Culture, Humanities | NY | $2,572,437Small | 86.13 |
| National 4-H CouncilEIN 36-2862206 | Human Services | MD | $41,223,591Large | 85.15 |
| National Ability CenterEIN 94-3025807 | Human Services | UT | $6,238,931Mid-sized | 92.45 |
| National Abortion FederationEIN 43-1097957 | Human and Civil Rights | DC | $7,494,407Mid-sized | 96.66 |
| National Academy of Engineering FundEIN 23-7284092 | Research and Public Policy | DC | $9,369,619Mid-sized | 80.56 |
| National Action Council for Minorities in EngineeringEIN 52-1190664 | Education | NY | $4,207,670Mid-sized | 79.02 |
| National Advocates for Pregnant WomenEIN 52-2282183 | Human and Civil Rights | NY | $1,175,320Small | 87.61 |
| National Alliance for the Mentally Ill of New York CityEIN 13-3077692 | Health | NY | $1,685,479Small | 87.19 |
| National Alliance to End HomelessnessEIN 52-1299641 | Human Services | DC | $4,134,436Mid-sized | 91.42 |
| National Alopecia Areata FoundationEIN 94-2780249 | Health | CA | $2,589,154Small | 93.29 |
| National Anti-Vivisection SocietyEIN 36-2229588 | Animals | IL | $2,699,620Small | 88.55 |
| National Aquarium, BaltimoreEIN 52-1121163 | Animals | MD | $47,928,724Large | 87.87 |
| National Archery in the Schools ProgramEIN 20-1112663 | Education | WI | $3,029,560Small | 89.87 |
| National Archives FoundationEIN 52-1792608 | Arts, Culture, Humanities | DC | $4,613,118Mid-sized | 80.67 |
| National Arts StrategiesEIN 13-3170827 | Arts, Culture, Humanities | VA | $2,266,523Small | 87.97 |
| National Association for the Advancement of Colored PeopleEIN 13-1084135 | Human and Civil Rights | MD | $24,828,336Large | 75.18 |
| National Association of Chain Drug Stores FoundationEIN 51-0144922 | Health | VA | $1,241,781Small | 86.19 |
| National Association of Charter School AuthorizersEIN 84-1553195 | Education | IL | $6,522,654Mid-sized | 85.00 |
| National Association of Chiefs of PoliceEIN 59-1164090 | Human Services | FL | $3,647,564Mid-sized | 77.64 |
| National Association of Free and Charitable ClinicsEIN 56-2273242 | Health | VA | $1,406,409Small | 79.43 |
| National Association of Police Athletic/Activities LeagueEIN 22-1838364 | Human Services | FL | $687,478Small | 60.18 |
| National Association of ScholarsEIN 11-2741490 | Education | NY | $1,225,920Small | 89.75 |
| National Ataxia FoundationEIN 41-0832903 | Health | MN | $2,148,024Small | 90.71 |
| National Audubon SocietyEIN 13-1624102 | Environment | NY | $104,107,085Large | 92.44 |
| National Automobile Dealers Charitable FoundationEIN 54-1008060 | Human Services | VA | $1,843,364Small | 74.31 |
| National AviaryEIN 25-1667146 | Animals | PA | $6,130,917Mid-sized | 90.73 |
| National Black Child Development InstituteEIN 52-0908178 | Human and Civil Rights | MD | $2,257,300Small | 80.87 |
| National Book FoundationEIN 13-3347524 | Arts, Culture, Humanities | NY | $1,481,743Small | 85.46 |
| National Braille PressEIN 04-2104740 | Human Services | MA | $4,055,854Mid-sized | 79.76 |
| National Brain Tumor SocietyEIN 04-3068130 | Health | MA | $8,536,282Mid-sized | 77.82 |
| National Breast Cancer Coalition FundEIN 52-1782065 | Health | DC | $3,232,303Small | 85.46 |
| National Breast Cancer Foundation, Inc.EIN 75-2391148 | Health | TX | $12,307,503Mid-sized | 85.82 |