| KCTS TelevisionEIN 91-1221895 | Arts, Culture, Humanities | WA | $17,669,145Large | 82.68 |
| 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 |
| KERAEIN 75-2084961 | Arts, Culture, Humanities | TX | $23,975,652Large | 89.44 |
| Kidspace Children's MuseumEIN 95-3501213 | Arts, Culture, Humanities | CA | $5,636,442Mid-sized | 94.98 |
| KIXE-TVEIN 94-1569300 | Arts, Culture, Humanities | CA | $1,476,890Small | 85.09 |
| Knoxville Opera CompanyEIN 62-1015262 | Arts, Culture, Humanities | TN | $1,564,890Small | 73.58 |
| KNPBEIN 88-0172215 | Arts, Culture, Humanities | NV | $4,049,715Mid-sized | 89.18 |
| Koahnic Broadcast CorporationEIN 92-0139738 | Arts, Culture, Humanities | AK | $2,479,153Small | 87.62 |
| KOCE-TV Foundation/PBS SoCalEIN 95-3220724 | Arts, Culture, Humanities | CA | $18,180,419Large | 93.42 |
| Kohl Children's Museum of Greater ChicagoEIN 36-3706878 | Arts, Culture, Humanities | IL | $4,802,705Mid-sized | 86.88 |
| KQEDEIN 94-1241309 | Arts, Culture, Humanities | CA | $81,269,351Large | 91.32 |
| KSMQEIN 68-0599645 | Arts, Culture, Humanities | MN | $1,940,862Small | 78.12 |
| KUOW Puget Sound Public RadioEIN 91-2079402 | Arts, Culture, Humanities | WA | $15,559,350Large | 93.31 |
| KVIEEIN 94-1421463 | Arts, Culture, Humanities | CA | $10,941,160Mid-sized | 86.34 |
| La Jolla Music SocietyEIN 23-7148171 | Arts, Culture, Humanities | CA | $4,368,421Mid-sized | 85.59 |
| La Jolla PlayhouseEIN 95-1941117 | Arts, Culture, Humanities | CA | $19,706,336Large | 87.34 |
| LA OperaEIN 95-2096402 | Arts, Culture, Humanities | CA | $42,265,305Large | 87.42 |
| Laguna Art MuseumEIN 33-0717157 | Arts, Culture, Humanities | CA | $2,339,192Small | 73.10 |
| Lake Erie Nature & Science CenterEIN 34-0845030 | Arts, Culture, Humanities | OH | $1,414,666Small | 92.23 |
| Lakeland Public TelevisionEIN 41-1265701 | Arts, Culture, Humanities | MN | $2,788,423Small | 87.20 |
| Lakeview Cemetery FoundationEIN 34-1429875 | Arts, Culture, Humanities | OH | $1,539,223Small | 81.69 |
| LancasterHistory.orgEIN 23-1365154 | Arts, Culture, Humanities | PA | $2,255,715Small | 76.17 |
| Landmark on Main StreetEIN 11-2444833 | Arts, Culture, Humanities | NY | $1,510,616Small | 91.18 |
| Laumeier Sculpture ParkEIN 43-1131429 | Arts, Culture, Humanities | MO | $1,879,075Small | 73.48 |
| League of American OrchestrasEIN 23-7300636 | Arts, Culture, Humanities | NY | $7,061,267Mid-sized | 90.36 |
| Lensic Performing Arts CenterEIN 85-0448396 | Arts, Culture, Humanities | NM | $3,804,951Mid-sized | 90.46 |
| Levine Museum of the New SouthEIN 56-1748648 | Arts, Culture, Humanities | NC | $2,311,042Small | 83.95 |
| Liberty Science CenterEIN 22-2302253 | Arts, Culture, Humanities | NJ | $27,635,857Large | 91.45 |
| Library Company of PhiladelphiaEIN 23-1370444 | Arts, Culture, Humanities | PA | $3,452,930Small | 86.21 |
| Library Foundation of Los AngelesEIN 95-4368250 | Arts, Culture, Humanities | CA | $6,805,193Mid-sized | 94.18 |
| Lincoln Center for the Performing ArtsEIN 13-1847137 | Arts, Culture, Humanities | NY | $171,260,689Large | 90.26 |
| Lincoln Center TheaterEIN 13-3004747 | Arts, Culture, Humanities | NY | $44,380,044Large | 91.88 |
| Lincoln Children's MuseumEIN 47-0716636 | Arts, Culture, Humanities | NE | $1,529,973Small | 86.62 |
| Lindsay Wildlife MuseumEIN 94-6104179 | Arts, Culture, Humanities | CA | $2,679,461Small | 87.12 |
| Livermore Valley Performing Arts CenterEIN 68-0419182 | Arts, Culture, Humanities | CA | $3,917,776Mid-sized | 90.54 |
| Living Arts & Science CenterEIN 61-0675663 | Arts, Culture, Humanities | KY | $883,955Small | 88.93 |
| Lobero Theatre FoundationEIN 95-1831068 | Arts, Culture, Humanities | CA | $2,980,948Small | 83.58 |
| Lone Star Flight MuseumEIN 76-0213778 | Arts, Culture, Humanities | TX | $4,193,643Mid-sized | 83.29 |
| Long Beach Museum of ArtEIN 95-2567271 | Arts, Culture, Humanities | CA | $1,612,856Small | 84.90 |
| Long Beach OperaEIN 95-3387074 | Arts, Culture, Humanities | CA | $2,078,167Small | 70.99 |
| Long Island Children's MuseumEIN 11-3035221 | Arts, Culture, Humanities | NY | $4,693,196Mid-sized | 82.81 |
| Long Wharf TheatreEIN 06-6073063 | Arts, Culture, Humanities | CT | $7,523,171Mid-sized | 86.98 |
| Longyear MuseumEIN 04-2203829 | Arts, Culture, Humanities | MA | $3,858,317Mid-sized | 87.55 |
| Los Angeles BalletEIN 20-1819852 | Arts, Culture, Humanities | CA | $2,925,423Small | 76.38 |
| Los Angeles Chamber OrchestraEIN 23-7010825 | Arts, Culture, Humanities | CA | $4,917,365Mid-sized | 88.10 |
| Los Angeles County Museum of ArtEIN 95-2264067 | Arts, Culture, Humanities | CA | $135,966,047Large | 90.69 |
| Los Angeles Master Chorale AssociationEIN 95-2315682 | Arts, Culture, Humanities | CA | $5,610,819Mid-sized | 83.58 |
| Los Angeles Museum of the HolocaustEIN 46-0503824 | Arts, Culture, Humanities | CA | $2,887,434Small | 80.39 |
| Louisiana Children's MuseumEIN 72-0929068 | Arts, Culture, Humanities | LA | $2,248,572Small | 85.55 |
| Louisiana Philharmonic OrchestraEIN 72-1189023 | Arts, Culture, Humanities | LA | $5,568,310Mid-sized | 86.72 |
| Louisiana Symphony AssociationEIN 72-6001959 | Arts, Culture, Humanities | LA | $2,049,050Small | 72.62 |
| Louisville BalletEIN 61-6033779 | Arts, Culture, Humanities | KY | $4,486,519Mid-sized | 88.95 |
| Louisville Free Public Library FoundationEIN 61-0969361 | Arts, Culture, Humanities | KY | $3,582,104Mid-sized | 93.15 |
| Louisville OrchestraEIN 61-6000384 | Arts, Culture, Humanities | KY | $6,751,076Mid-sized | 88.89 |
| Louisville Public MediaEIN 61-1259787 | Arts, Culture, Humanities | KY | $6,051,773Mid-sized | 93.37 |
| Lower Manhattan Cultural CouncilEIN 23-7348782 | Arts, Culture, Humanities | NY | $3,660,793Mid-sized | 87.43 |
| LumberyardEIN 52-2158599 | Arts, Culture, Humanities | NY | $5,356,697Mid-sized | 84.71 |
| Lutheran Music ProgramEIN 47-0638445 | Arts, Culture, Humanities | MN | $1,097,899Small | 79.63 |
| Lyric Opera of ChicagoEIN 36-6008929 | Arts, Culture, Humanities | IL | $86,475,933Large | 89.58 |