| The Korea SocietyEIN 52-1714111 | International | NY | $2,705,840Small | 85.31 |
| The Korean-American Family Service Center, Inc.EIN 13-3609811 | Human Services | NY | $2,316,167Small | 89.16 |
| The Labouré SocietyEIN 41-2001751 | Religion | MN | $2,044,197Small | 80.17 |
| The LAM FoundationEIN 31-1438001 | Health | OH | $1,642,400Small | 84.95 |
| The Lamb CenterEIN 41-2222581 | Human Services | VA | $1,026,308Small | 92.44 |
| The Lambi Fund of HaitiEIN 52-1843357 | International | DC | $764,757Small | 84.23 |
| The Land InstituteEIN 48-0842156 | Research and Public Policy | KS | $3,570,717Mid-sized | 92.36 |
| The LarkEIN 13-3779197 | Arts, Culture, Humanities | NY | $1,786,888Small | 85.14 |
| The Library FoundationEIN 93-1190983 | Arts, Culture, Humanities | OR | $2,569,779Small | 95.77 |
| The Life Center of Long IslandEIN 11-2767098 | Health | NY | $1,709,981Small | 87.03 |
| The Light House Mission MinistriesEIN 35-6023923 | Human Services | IN | $1,055,158Small | 72.38 |
| The Little Orchestra SocietyEIN 13-2638292 | Arts, Culture, Humanities | NY | $1,346,971Small | 71.91 |
| The Living DesertEIN 95-3385354 | Animals | CA | $12,284,906Mid-sized | 97.58 |
| The Loft Literary CenterEIN 41-1297735 | Arts, Culture, Humanities | MN | $2,229,735Small | 84.75 |
| The Lord's PlaceEIN 59-2240502 | Human Services | FL | $7,433,411Mid-sized | 95.60 |
| The Los Angeles ConservancyEIN 95-3273046 | Arts, Culture, Humanities | CA | $2,409,119Small | 91.19 |
| The Los Angeles PhilharmonicEIN 95-1696734 | Arts, Culture, Humanities | CA | $130,412,242Large | 93.73 |
| The LPGA FoundationEIN 59-3085528 | Human Services | FL | $5,469,752Mid-sized | 83.77 |
| The Luke CommissionEIN 20-8635797 | International | ID | $5,038,554Mid-sized | 84.34 |
| The Luke SocietyEIN 84-0563440 | International | SD | $2,715,824Small | 79.40 |
| The Lustgarten Foundation for Pancreatic Cancer ResearchEIN 31-1611837 | Health | NY | $22,729,922Large | 100.00 |
| The Lyford Cay FoundationEIN 23-7025275 | Education | NY | $2,744,466Small | 85.36 |
| The MacDowell ColonyEIN 13-1592242 | Arts, Culture, Humanities | NH | $4,178,835Mid-sized | 81.05 |
| The Mailbox ClubEIN 23-7229445 | Religion | GA | $3,215,222Small | 93.91 |
| The Maine Children's Home for Little WanderersEIN 01-0267392 | Human Services | ME | $2,473,057Small | 92.02 |
| The Marfan FoundationEIN 52-1265361 | Health | NY | $4,465,668Mid-sized | 91.83 |
| The Marin Humane SocietyEIN 94-1156562 | Animals | CA | $8,260,861Mid-sized | 96.31 |
| The Marine Mammal CenterEIN 51-0144434 | Animals | CA | $10,612,857Mid-sized | 95.00 |
| The Mariners' MuseumEIN 54-0541801 | Arts, Culture, Humanities | VA | $10,573,622Mid-sized | 93.91 |
| The Marion InstituteEIN 04-3206583 | Environment | MA | $1,546,652Small | 78.69 |
| The Mark Twain House & MuseumEIN 06-0685118 | Arts, Culture, Humanities | CT | $3,033,651Small | 81.04 |
| The Marshall Legacy InstituteEIN 54-1853093 | International | VA | $1,715,975Small | 84.45 |
| The Maryland SPCAEIN 52-6001558 | Animals | MD | $6,592,967Mid-sized | 95.12 |
| The Maryland Symphony OrchestraEIN 52-1259358 | Arts, Culture, Humanities | MD | $1,569,658Small | 75.80 |
| The Massachusetts Historical SocietyEIN 04-2108374 | Arts, Culture, Humanities | MA | $6,102,179Mid-sized | 83.10 |
| The McGaw YMCAEIN 36-2169194 | Human Services | IL | $17,470,946Large | 89.81 |
| The Mentoring AllianceEIN 75-2541408 | Human Services | TX | $3,092,339Small | 86.27 |
| The Metropolitan Opera GuildEIN 13-1681983 | Arts, Culture, Humanities | NY | $11,808,977Mid-sized | 83.84 |
| The Middle East Media Research InstituteEIN 52-2068483 | International | DC | $5,903,271Mid-sized | 89.74 |
| The Midnight MissionEIN 95-1691293 | Human Services | CA | $9,508,855Mid-sized | 94.78 |
| The Miller Center FoundationEIN 54-1420895 | Research and Public Policy | VA | $2,724,275Small | 74.87 |
| The Mind TrustEIN 20-4560286 | Education | IN | $6,929,027Mid-sized | 92.22 |
| The Minneapolis FoundationEIN 41-6029402 | Community Development | MN | $70,849,060Large | 94.48 |
| The Minneapolis Institute of ArtsEIN 41-0693915 | Arts, Culture, Humanities | MN | $41,681,111Large | 92.05 |
| The Mint MuseumsEIN 56-0670666 | Arts, Culture, Humanities | NC | $10,388,083Mid-sized | 91.95 |
| The MissionEIN 68-0280223 | Religion | CA | $2,335,814Small | 50.63 |
| The Mission at Kern CountyEIN 95-1890705 | Human Services | CA | $4,091,592Mid-sized | 83.89 |
| The Mission ContinuesEIN 20-8742553 | Human Services | MO | $10,862,831Mid-sized | 100.00 |
| The Mockingbird SocietyEIN 91-2051340 | Human Services | WA | $2,216,828Small | 90.26 |
| The More ProjectEIN 20-3770594 | International | UT | $537,285Small | 60.15 |
| The Morgan Library & MuseumEIN 13-1624146 | Arts, Culture, Humanities | NY | $25,933,283Large | 87.87 |
| The Morton ArboretumEIN 36-1505770 | Environment | IL | $34,397,968Large | 91.76 |
| The Mother Divine ProgramEIN 95-2485909 | Religion | NY | $1,929,640Small | 79.87 |
| The MountEIN 04-2666846 | Arts, Culture, Humanities | MA | $2,021,432Small | 87.85 |
| The Mountain InstituteEIN 55-0541323 | Environment | DC | $2,301,129Small | 80.82 |
| The Mr. Holland's Opus FoundationEIN 95-4604927 | Education | CA | $1,895,014Small | 95.80 |
| The Multiple Myeloma Research FoundationEIN 06-1504413 | Health | CT | $30,536,598Large | 98.23 |
| The Municipal Art Society of New YorkEIN 13-5562288 | Community Development | NY | $4,121,783Mid-sized | 77.83 |
| The Museum of Chinese in AmericaEIN 11-2517055 | Arts, Culture, Humanities | NY | $3,141,818Small | 77.19 |
| The Museum of Contemporary Art, Los AngelesEIN 95-3433820 | Arts, Culture, Humanities | CA | $20,004,107Large | 88.87 |