| MacPhail Center for MusicEIN 41-1729340 | Education | MN | $12,206,724Mid-sized | 88.48 |
| Macula Vision Research FoundationEIN 23-2876473 | Health | PA | $823,042Small | 86.25 |
| Madison Public Library FoundationEIN 39-1777242 | Arts, Culture, Humanities | WI | $1,412,832Small | 82.71 |
| Madison Square Park ConservancyEIN 14-1859935 | Environment | NY | $4,811,212Mid-sized | 85.67 |
| Mahaiwe Performing Arts CenterEIN 57-1140453 | Arts, Culture, Humanities | MA | $2,292,098Small | 84.68 |
| Mahoning Valley Historical SocietyEIN 34-0872868 | Arts, Culture, Humanities | OH | $1,151,615Small | 80.94 |
| Main Line Animal RescueEIN 23-3017210 | Animals | PA | $2,690,621Small | 86.15 |
| Maine AudubonEIN 01-0248780 | Environment | ME | $2,415,412Small | 87.16 |
| Maine Historical SocietyEIN 01-0211530 | Arts, Culture, Humanities | ME | $2,301,135Small | 80.31 |
| Maine Justice FoundationEIN 22-2559133 | Human and Civil Rights | ME | $1,995,716Small | 88.87 |
| Make the Road New YorkEIN 11-3344389 | Human and Civil Rights | NY | $16,758,025Large | 86.98 |
| Make-A-Wish ArizonaEIN 86-0409636 | Health | AZ | $6,948,950Mid-sized | 86.43 |
| Make-A-Wish Central and Western North CarolinaEIN 56-1492432 | Health | NC | $5,313,178Mid-sized | 84.24 |
| Make-A-Wish Central CaliforniaEIN 77-0116530 | Health | CA | $2,232,435Small | 83.75 |
| Make-A-Wish Foundation of Central & South TexasEIN 74-2357788 | Health | TX | $4,127,913Mid-sized | 81.45 |
| Make-A-Wish Foundation of Central and Northern FloridaEIN 59-3235806 | Health | FL | $5,140,669Mid-sized | 86.89 |
| Make-A-Wish Foundation of ColoradoEIN 74-2273004 | Health | CO | $6,144,150Mid-sized | 84.23 |
| Make-A-Wish Foundation of ConnecticutEIN 22-2710919 | Health | CT | $4,763,360Mid-sized | 87.75 |
| Make-A-Wish Foundation of IowaEIN 42-1310530 | Health | IA | $3,316,454Small | 83.17 |
| Make-A-Wish Foundation of Metro New York and Western New YorkEIN 11-2645641 | Health | NY | $13,532,441Large | 84.57 |
| Make-A-Wish Foundation of MichiganEIN 38-2505812 | Health | MI | $8,622,407Mid-sized | 84.34 |
| Make-A-Wish Foundation of Middle TennesseeEIN 62-1833327 | Health | TN | $2,046,620Small | 80.48 |
| Make-A-Wish Foundation of New HampshireEIN 02-0405369 | Health | NH | $2,037,107Small | 85.96 |
| Make-A-Wish Foundation of New JerseyEIN 22-2488495 | Health | NJ | $6,897,332Mid-sized | 84.07 |
| Make-A-Wish Foundation of New MexicoEIN 85-0347088 | Health | NM | $1,798,951Small | 85.69 |
| Make-A-Wish Foundation of North TexasEIN 75-1889666 | Health | TX | $12,212,799Mid-sized | 83.38 |
| Make-A-Wish Foundation of Northeast New YorkEIN 14-1703503 | Health | NY | $2,120,871Small | 86.06 |
| Make-A-Wish Foundation of Northeastern California and Northern NevadaEIN 68-0027351 | Health | CA | $5,130,826Mid-sized | 87.91 |
| Make-A-Wish Foundation of South DakotaEIN 46-0375953 | Health | SD | $1,616,519Small | 88.23 |
| Make-A-Wish Foundation of Southern FloridaEIN 59-2620322 | Health | FL | $8,333,969Mid-sized | 82.41 |
| Make-A-Wish Foundation of Southern NevadaEIN 88-0371088 | Health | NV | $2,421,873Small | 88.05 |
| Make-A-Wish Foundation of the Hudson ValleyEIN 13-3344306 | Health | NY | $2,644,291Small | 82.30 |
| Make-A-Wish Foundation of the Mid-SouthEIN 62-1253153 | Health | TN | $4,427,435Mid-sized | 89.86 |
| Make-A-Wish Foundation of WisconsinEIN 39-1543541 | Health | WI | $6,645,321Mid-sized | 82.56 |
| Make-A-Wish InternationalEIN 86-0726985 | Health | AZ | $7,717,030Mid-sized | 88.80 |
| Make-A-Wish Orange County and the Inland EmpireEIN 33-0036556 | Health | CA | $5,195,279Mid-sized | 82.37 |
| Make-A-Wish OregonEIN 82-0385049 | Health | OR | $3,873,652Mid-sized | 81.54 |
| Make-A-Wish® Philadelphia, Delaware & Susquehanna ValleyEIN 22-2755963 | Health | PA | $5,735,146Mid-sized | 85.20 |
| Maltz Museum of Jewish HeritageEIN 04-3684531 | Arts, Culture, Humanities | OH | $3,165,496Small | 85.21 |
| Management Leadership for TomorrowEIN 52-1795164 | Human Services | MD | $10,079,879Mid-sized | 87.58 |
| Manna on Main StreetEIN 23-2287252 | Human Services | PA | $2,603,058Small | 87.92 |
| ManometEIN 22-3051362 | Environment | MA | $4,959,830Mid-sized | 89.86 |
| MapLightEIN 33-1094233 | Human and Civil Rights | CA | $2,988,723Small | 89.96 |
| Maranatha Volunteers InternationalEIN 38-1945104 | Religion | CA | $12,412,689Mid-sized | 88.14 |
| Marine Biological LaboratoryEIN 04-2104690 | Research and Public Policy | MA | $42,842,812Large | 86.19 |
| Marine Conservation InstituteEIN 91-1725640 | Environment | WA | $1,068,198Small | 81.68 |
| Marine Corps Scholarship FoundationEIN 22-1905062 | Education | VA | $13,861,077Large | 81.14 |
| Mars Hill ProductionsEIN 76-0235320 | Religion | TX | $979,513Small | 83.98 |
| Martha O'Bryan CenterEIN 62-0477728 | Human Services | TN | $14,942,210Large | 89.19 |
| MarwenEIN 36-3523622 | Education | IL | $2,669,179Small | 86.93 |
| Maryland Food BankEIN 52-1135690 | Human Services | MD | $68,947,210Large | 82.13 |
| Maryland Historical SocietyEIN 52-0403670 | Arts, Culture, Humanities | MD | $3,479,411Small | 84.20 |
| Maryland Science CenterEIN 52-0668166 | Arts, Culture, Humanities | MD | $8,419,673Mid-sized | 82.58 |
| Maryland Therapeutic RidingEIN 52-2035698 | Health | MD | $988,423Small | 80.56 |
| Masonic Home for Children at OxfordEIN 56-0603924 | Human Services | NC | $5,835,714Mid-sized | 83.95 |
| Masonic Home of GeorgiaEIN 58-0140568 | Human Services | GA | $1,970,070Small | 87.50 |
| Mass Mentoring PartnershipEIN 22-3207958 | Human Services | MA | $2,420,195Small | 87.97 |
| Massachusetts Down Syndrome CongressEIN 22-2596246 | Health | MA | $1,509,177Small | 89.75 |
| Massachusetts Horticultural SocietyEIN 04-2104714 | Environment | MA | $1,690,583Small | 83.57 |
| Massachusetts Immigrant and Refugee Advocacy CoalitionEIN 22-3115048 | Human and Civil Rights | MA | $1,949,092Small | 86.25 |