| K-State AthleticsEIN 48-6098838 | Education | KS | $70,203,458Large | 82.33 |
| KaBOOM!EIN 52-1970904 | Community Development | DC | $23,776,884Large | 86.93 |
| Kalamazoo Institute of ArtsEIN 38-1617060 | Arts, Culture, Humanities | MI | $3,408,204Small | 84.82 |
| Kalamazoo Loaves & FishesEIN 38-2420575 | Human Services | MI | $6,262,242Mid-sized | 90.34 |
| Kalamazoo Symphony OrchestraEIN 38-6005710 | Arts, Culture, Humanities | MI | $3,637,484Mid-sized | 92.50 |
| Kandiyohi County Food ShelfEIN 41-1432367 | Human Services | MN | $1,311,189Small | 56.54 |
| Kansas 4-H Foundation, Inc. EIN 48-0623884 | Human Services | KS | $5,774,242Mid-sized | 93.66 |
| Kansas Big Brothers Big SistersEIN 23-7056717 | Human Services | KS | $4,081,549Mid-sized | 80.28 |
| Kansas City BalletEIN 43-6052680 | Arts, Culture, Humanities | MO | $10,326,107Mid-sized | 95.24 |
| Kansas City Repertory TheatreEIN 43-1168979 | Arts, Culture, Humanities | MO | $7,243,463Mid-sized | 85.33 |
| Kansas City Rescue MissionEIN 43-1287029 | Human Services | MO | $3,117,714Small | 92.39 |
| Kansas City Starlight TheatreEIN 44-0552079 | Arts, Culture, Humanities | MO | $20,852,373Large | 95.40 |
| Kansas City SymphonyEIN 43-1297475 | Arts, Culture, Humanities | MO | $16,520,157Large | 90.67 |
| Kansas Food BankEIN 48-0959213 | Human Services | KS | $20,550,099Large | 96.11 |
| Kansas Humane SocietyEIN 48-0554339 | Animals | KS | $4,469,887Mid-sized | 88.79 |
| Kansas University Alumni AssociationEIN 48-0291250 | Education | KS | $5,808,390Mid-sized | 85.00 |
| Kappa Kappa Gamma FoundationEIN 31-6049792 | Education | OH | $7,440,304Mid-sized | 87.45 |
| Kare Youth LeagueEIN 95-1869644 | Human Services | CA | $5,423,003Mid-sized | 86.10 |
| Karen Ann Quinlan Charitable FoundationEIN 22-3562304 | Health | NJ | $478,763Small | 28.86 |
| Katahdin ProductionsEIN 90-0089252 | Arts, Culture, Humanities | CA | $2,078,366Small | 65.83 |
| Katonah Museum of ArtEIN 13-6161548 | Arts, Culture, Humanities | NY | $1,716,906Small | 76.43 |
| Katy Christian MinistriesEIN 76-0157123 | Human Services | TX | $3,648,834Mid-sized | 94.69 |
| Kauffman Center for the Performing ArtsEIN 43-1866550 | Arts, Culture, Humanities | MO | $21,566,408Large | 89.45 |
| Kaufman Music CenterEIN 13-1991118 | Education | NY | $9,542,658Mid-sized | 85.13 |
| KC Healthy KidsEIN 20-4613795 | Human Services | KS | $1,307,625Small | 87.15 |
| KCBXEIN 23-7292203 | Arts, Culture, Humanities | CA | $1,284,419Small | 86.74 |
| KCETLinkEIN 95-2211661 | Arts, Culture, Humanities | CA | $28,403,983Large | 77.03 |
| KCRW FoundationEIN 95-3750631 | Arts, Culture, Humanities | CA | $19,335,725Large | 90.18 |
| KCTS TelevisionEIN 91-1221895 | Arts, Culture, Humanities | WA | $17,669,145Large | 82.68 |
| Keep a Child AliveEIN 73-1682844 | International | NY | $4,326,731Mid-sized | 85.72 |
| Keep America BeautifulEIN 13-1761633 | Community Development | CT | $8,384,406Mid-sized | 90.65 |
| Keep Indianapolis BeautifulEIN 31-1005792 | Environment | IN | $3,788,027Mid-sized | 86.87 |
| Keep Pennsylvania BeautifulEIN 25-1645291 | Environment | PA | $898,818Small | 92.69 |
| Keepers of the WildEIN 88-0345277 | Animals | AZ | $2,285,639Small | 89.05 |
| Kelly Anne Dolan Memorial FundEIN 23-2108560 | Health | PA | $585,740Small | 81.65 |
| Kempe Foundation for the Prevention and Treatment of Child Abuse and NeglectEIN 84-1064295 | Human Services | CO | $2,336,850Small | 82.42 |
| Kent Animal ShelterEIN 23-7007068 | Animals | NY | $1,235,281Small | 90.46 |
| Kentucky 4-H FoundationEIN 23-7437297 | Human Services | KY | $1,393,387Small | 88.38 |
| Kentucky CoalitionEIN 31-1113237 | Human and Civil Rights | KY | $2,134,146Small | 91.15 |
| Kentucky Horse Park FoundationEIN 62-1257717 | Animals | KY | $1,166,135Small | 69.94 |
| Kentucky Humane SocietyEIN 61-0463938 | Animals | KY | $6,720,440Mid-sized | 88.15 |
| Kentucky Museum of Art and CraftEIN 61-0985312 | Arts, Culture, Humanities | KY | $1,163,320Small | 80.39 |
| Kentucky OperaEIN 61-6013111 | Arts, Culture, Humanities | KY | $2,076,356Small | 84.47 |
| Kentucky Youth AdvocatesEIN 61-0929390 | Human Services | KY | $2,116,135Small | 95.10 |
| KERAEIN 75-2084961 | Arts, Culture, Humanities | TX | $23,975,652Large | 89.44 |
| Keren OrEIN 13-5655186 | Human Services | NY | $2,479,275Small | 92.61 |
| KeshetEIN 48-1278664 | Human and Civil Rights | MA | $2,340,039Small | 94.18 |
| Keys for Kids MinistriesEIN 38-1675000 | Religion | MI | $1,072,670Small | 83.74 |
| Keystone Community ServicesEIN 41-0693924 | Human Services | MN | $5,341,059Mid-sized | 91.37 |
| Keystone Policy CenterEIN 84-0688506 | Research and Public Policy | CO | $3,705,939Mid-sized | 78.10 |
| Khan AcademyEIN 26-1544963 | Education | CA | $37,495,508Large | 92.02 |
| Khyentse FoundationEIN 91-2167303 | Religion | CA | $2,419,910Small | 86.56 |
| KickStart InternationalEIN 06-1613235 | International | CA | $6,397,358Mid-sized | 84.09 |
| Kickstart KidsEIN 52-1706526 | Human Services | TX | $5,641,072Mid-sized | 81.52 |
| Kid One TransportEIN 63-1165579 | Health | AL | $1,248,673Small | 82.73 |
| KiddoEIN 94-2848305 | Education | CA | $3,335,426Small | 91.14 |
| Kidney & Urology Foundation of AmericaEIN 13-1777413 | Health | NJ | $296,992Small | 60.11 |
| Kidney Cancer AssociationEIN 36-3719712 | Health | IL | $1,693,437Small | 97.46 |
| Kids Across America FoundationEIN 43-1348373 | Human Services | MO | $5,528,517Mid-sized | 83.82 |
| Kids Alive InternationalEIN 31-1140515 | International | IN | $11,481,507Mid-sized | 100.00 |