| International Child CareEIN 35-6059274 | International | MI | $665,414Small | 77.85 |
| International Christian ConcernEIN 52-1942990 | Religion | DC | $2,483,260Small | 93.31 |
| International Christian MinistriesEIN 62-1465626 | Religion | CA | $939,719Small | 80.19 |
| International Churchill SocietyEIN 02-0482584 | Arts, Culture, Humanities | DC | $947,322Small | 75.26 |
| International Conservation Caucus FoundationEIN 83-0449176 | Environment | DC | $1,401,209Small | 77.40 |
| International Exotic Animal SanctuaryEIN 75-2283460 | Animals | TX | $864,548Small | 70.36 |
| International Festival of Arts & IdeasEIN 06-1444222 | Arts, Culture, Humanities | CT | $2,299,189Small | 82.87 |
| International Folk Art AllianceEIN 35-2285824 | Arts, Culture, Humanities | NM | $3,349,957Small | 92.45 |
| International Friendships, Inc.EIN 31-0971249 | Religion | OH | $1,909,000Small | 87.24 |
| International Leadership InstituteEIN 31-1803122 | Religion | GA | $2,737,716Small | 91.15 |
| International NeedsEIN 91-1080666 | Religion | MI | $2,927,719Small | 88.95 |
| International OCD FoundationEIN 22-2894564 | Health | MA | $2,018,242Small | 88.32 |
| International Primate Protection LeagueEIN 51-0194013 | Animals | SC | $1,096,700Small | 97.24 |
| International Psoriasis CouncilEIN 20-1566278 | Health | MO | $1,324,090Small | 82.17 |
| International Rhino FoundationEIN 75-2395006 | Animals | TX | $2,814,196Small | 93.96 |
| International RiversEIN 94-3158295 | Environment | CA | $2,122,078Small | 82.97 |
| International SamaritanEIN 34-1811907 | International | MI | $2,056,011Small | 90.09 |
| International Senior Lawyers CorporationEIN 52-2241212 | Human and Civil Rights | NY | $1,291,304Small | 82.82 |
| International Society for Infectious DiseasesEIN 22-2473000 | Health | MA | $2,177,843Small | 87.68 |
| International Waldenstrom's Macroglobulinemia FoundationEIN 54-1784426 | Health | FL | $2,762,604Small | 95.29 |
| International Wolf CenterEIN 41-1543539 | Animals | MN | $1,624,232Small | 95.22 |
| Intersection for the ArtsEIN 94-1593216 | Arts, Culture, Humanities | CA | $3,286,407Small | 95.00 |
| Interstitial Cystitis AssociationEIN 13-3292137 | Health | VA | $766,632Small | 78.96 |
| Intiman TheatreEIN 23-7328597 | Arts, Culture, Humanities | WA | $970,982Small | 76.76 |
| Invest in KidsEIN 84-1455282 | Human Services | CO | $2,449,872Small | 82.39 |
| Investigative Reporters & EditorsEIN 51-0166741 | Education | MO | $2,500,441Small | 91.67 |
| Invisible ChildrenEIN 54-2164338 | International | DC | $1,622,588Small | 79.04 |
| Iowa Citizens for Community ImprovementEIN 42-1110721 | Research and Public Policy | IA | $1,101,924Small | 88.90 |
| Iowa Sports FoundationEIN 42-1278326 | Human Services | IA | $1,750,215Small | 74.24 |
| Iran Alive MinistriesEIN 14-1865897 | Religion | TX | $1,585,923Small | 79.73 |
| Irish Arts CenterEIN 51-0244834 | Arts, Culture, Humanities | NY | $3,362,693Small | 81.56 |
| Irish Cultural CenterEIN 86-0930096 | Arts, Culture, Humanities | AZ | $859,521Small | 70.77 |
| Irish International Immigrant CenterEIN 04-3063382 | Human Services | MA | $1,920,895Small | 95.61 |
| Irvine Nature CenterEIN 52-1231286 | Environment | MD | $1,926,838Small | 90.75 |
| Irving CaresEIN 75-1436937 | Human Services | TX | $1,778,752Small | 85.87 |
| ISAIAHEIN 41-1957358 | Human and Civil Rights | MN | $2,585,091Small | 84.70 |
| Israel Cancer Association USAEIN 13-6218184 | Health | FL | $826,326Small | 96.66 |
| Israel Scholarship Education FoundationEIN 13-2909403 | Education | NY | $1,579,306Small | 76.50 |
| Issaquah Schools FoundationEIN 94-3050254 | Education | WA | $1,780,418Small | 86.14 |
| It's The Journey, Inc.EIN 47-0897591 | Health | GA | $1,675,912Small | 92.27 |
| Izaak Walton League of AmericaEIN 36-1930035 | Environment | MD | $2,407,893Small | 85.81 |
| J103EIN 62-1535834 | Religion | TN | $2,317,625Small | 75.19 |
| Jack & Jill Children's CenterEIN 59-0637870 | Human Services | FL | $3,014,708Small | 88.30 |
| Jack and Jill Late Stage Cancer FoundationEIN 20-4415512 | Health | GA | $957,055Small | 88.74 |
| Jackson Hole Conservation AllianceEIN 83-0245647 | Environment | WY | $720,418Small | 86.39 |
| Jacksonville Public Education FundEIN 59-2756660 | Education | FL | $2,224,299Small | 91.64 |
| James J. Buquet, Jr. Bayouland YMCAEIN 72-0880478 | Human Services | LA | $1,284,007Small | 67.93 |
| James River AssociationEIN 51-0211913 | Environment | VA | $1,942,172Small | 88.07 |
| James Sewell BalletEIN 41-1787932 | Arts, Culture, Humanities | MN | $1,019,266Small | 81.71 |
| Jamestown FoundationEIN 36-3266722 | International | DC | $1,383,854Small | 89.73 |
| Jamestown-Yorktown FoundationEIN 31-1618642 | Arts, Culture, Humanities | VA | $2,823,765Small | 87.55 |
| Japanese American Citizens LeagueEIN 94-1245885 | Human and Civil Rights | CA | $2,415,606Small | 84.12 |
| Japanese Cultural Center of HawaiiEIN 99-0256147 | International | HI | $1,051,294Small | 73.50 |
| Jazz Arts Group of ColumbusEIN 31-0852944 | Arts, Culture, Humanities | OH | $1,684,117Small | 74.63 |
| Jazz St. LouisEIN 43-1761629 | Arts, Culture, Humanities | MO | $3,208,441Small | 90.81 |
| Jenesse CenterEIN 95-3652529 | Human Services | CA | $3,425,453Small | 88.06 |
| Jenkins Arboretum & GardensEIN 23-2726419 | Environment | PA | $1,101,078Small | 84.21 |
| Jerusalem FellowshipsEIN 13-3740640 | Religion | NY | $1,597,923Small | 45.78 |
| Jesuit College Preparatory School of Dallas FoundationEIN 75-6054602 | Education | TX | $2,643,067Small | 86.00 |
| Jewelers for ChildrenEIN 13-3716474 | Human Services | NY | $2,850,793Small | 76.25 |