| 1 | William Penn University | Education | $51.4M | $85.0M |
| 2 | Mahaska Rural Water System INC | Unclassified | $3.2M | $20.0M |
| 3 | George Daily Charitable Trust | Unclassified | $2.6M | $11.8M |
| 4 | Mahaska County Employees Health Plan Trust | Unclassified | $2.6M | $2.0M |
| 5 | Oskaloosa Society for Christian Instruction | Education | $2.4M | $5.0M |
| 6 | Pepsi Cola Bottling Company Employees Health Plan Trust | Unclassified | $2.3M | $164K |
| 7 | Mahaska County YMCA | Human Services | $2.2M | $13.9M |
| 8 | Mahaska Community Recreation Foundation INC | Philanthropy, Voluntarism & Grantmaking | $2.0M | $5.4M |
| 9 | Heart of America Athletic Conference | Education | $1.6M | $266K |
| 10 | Love INC of Mahaska County | Human Services | $1.2M | $483K |
| 11 | Mahaska Futureview INC | Arts, Culture & Humanities | $1.2M | $8.4M |
| 12 | Crisis Intervention Services | Human Services | $1.1M | $1.1M |
| 13 | Southern Iowa Fair and Exposition Oskaloosa Iowa | Unclassified | $892K | $593K |
| 14 | Brouwer Family Foundation | Philanthropy, Voluntarism & Grantmaking | $674K | $1.3M |
| 15 | Crookham Family Foundation | Philanthropy, Voluntarism & Grantmaking | $553K | $1.6M |
| 16 | Knights of Columbus | Unclassified | $505K | $395K |
| 17 | Iowa Sctp | Recreation & Sports | $501K | $384K |
| 18 | Legacy of Grace School Tuition Organization INC | Education | $483K | $557K |
| 19 | United Way of Mahaska County | Unclassified | $482K | $735K |
| 20 | Mahaska Hospital Foundation | Health Care | $473K | $1.6M |
| 21 | Friends of the Auditorium | Arts, Culture & Humanities | $470K | $78K |
| 22 | Iowa Farm Bureau Federation | Unclassified | $354K | $1.5M |
| 23 | Forest Cemetery Association | Unclassified | $343K | $545K |
| 24 | Stephen Memorial Animal Shelter INC | Animal-Related | $322K | $24K |
| 25 | South Central Iowa Independent Living Center INC | Education | $233K | $18K |
| 26 | American Legion | Unclassified | $230K | $207K |
| 27 | Mahaska County Historical Society | Unclassified | $221K | $2.0M |
| 28 | Sonshine Preschool INC | Education | $158K | $138K |
| 29 | Mahaska Hospice Auxiliary | Human Services | $141K | $147K |
| 30 | Friends Development Fund INC | Unclassified | $122K | $1.6M |
| 31 | Fraternal Order of Eagles | Unclassified | $95K | $67K |
| 32 | Benevolent & Protective Order of Elks of the USA | Unclassified | $93K | $72K |
| 33 | Golden Goose Club INC | Community Improvement & Capacity Building | $89K | $79K |
| 34 | Izaak Walton League of America INC | Unclassified | $85K | $108K |
| 35 | Oskaloosa Band Boosters INC | Unclassified | $85K | $101K |
| 36 | Oskaloosa Indian Booster Club Ltd | Education | $69K | $108K |
| 37 | Fine Arts and Cultural Events of Mahaska County | Arts, Culture & Humanities | $59K | $39K |
| 38 | Youth for Christ USA INC | Unclassified | $53K | $72K |
| 39 | Rotary International | Unclassified | $48K | $41K |
| 40 | Mahaska County Community Emergency Response Team | Public Safety, Disaster Preparedness & Relief | $44K | $48K |
| 41 | Stephen Animal Shelter Foundation INC | Animal-Related | $25K | $1.9M |
| 42 | Oskaloosa Elementary PTO | Education | $0 | $0 |
| 43 | Mahaska County Humane Society | Animal-Related | $0 | $0 |
| 44 | Association for Computing Machinery | Unclassified | $0 | $0 |
| 45 | The Class of 5-25-77 Scholarship INC | Education | $0 | $0 |
| 46 | Knights of Columbus | Unclassified | $0 | $0 |
| 47 | Good News Chapel Christian Reformed Church | Unclassified | $0 | $0 |
| 48 | Ruritan National Corp. | Unclassified | $0 | $0 |
| 49 | Ruritan National Corp. | Unclassified | $0 | $0 |
| 50 | Ancient Free & Accepted Masons of Iowa | Unclassified | $0 | $0 |
| 51 | Bethesda House INC | Unclassified | $0 | $0 |
| 52 | International Association of Lions Clubs | Unclassified | $0 | $0 |
| 53 | Lifehouse Community Church | Religion-Related | $0 | $0 |
| 54 | Southern Iowa Fair Foundation | Food, Agriculture & Nutrition | $0 | $0 |
| 55 | Oskaloosa Indoor Sports Complex Ltd | Recreation & Sports | $0 | $0 |
| 56 | Knights of Columbus | Mutual & Membership Benefit | $0 | $0 |
| 57 | Altrusa International INC | Unclassified | $0 | $0 |
| 58 | The Climb | Human Services | $0 | $0 |
| 59 | Reading League of Iowa | Education | $0 | $0 |
| 60 | Oskaloosa Childrens Museum INC | Arts, Culture & Humanities | $0 | $0 |
| 61 | Ai Equity Alliance Corp. | Education | $0 | $0 |
| 62 | Columbiettes INC | Unclassified | $0 | $0 |
| 63 | Oskaloosa Food Pantry Incorporated | Food, Agriculture & Nutrition | $0 | $0 |
| 64 | Good News Chapel | Unclassified | $0 | $0 |
| 65 | First Christian Church | Unclassified | $0 | $0 |
| 66 | Saint John Lutheran Church | Unclassified | $0 | $0 |
| 67 | Auxiliary of Mahaska Hospital Auxiliary | Unclassified | $0 | $0 |
| 68 | Oskaloosa Gateway Church of the Nazarene | Unclassified | $0 | $0 |
| 69 | Iowa Yearly Meeting of Friends | Unclassified | $0 | $0 |
| 70 | First Baptist Church | Unclassified | $0 | $0 |
| 71 | Iowa District Church of the Nazarene | Unclassified | $0 | $0 |
| 72 | First Christian Reformed Church of Oskaloosa | Unclassified | $0 | $0 |
| 73 | Park Church of Christ | Unclassified | $0 | $0 |
| 74 | Hawkeye Fly Fishing Association INC | Recreation & Sports | $0 | $0 |
| 75 | Grace Lutheran Church | Unclassified | $0 | $0 |
| 76 | Oskaloosa Hope | Unclassified | $0 | $0 |
| 77 | Friends of the Oskaloosa Public Library | Education | $0 | $0 |
| 78 | Iowa State Police Association Local 13 | Crime & Legal-Related | $0 | $0 |
| 79 | Evangel Mission Outreach Church INC | Unclassified | $0 | $0 |
| 80 | My Fathers House | Housing & Shelter | $0 | $0 |
| 81 | Optimist International | Unclassified | $0 | $0 |
| 82 | Oskaloosa Education Foundation Incorporated | Unclassified | $0 | $0 |
| 83 | Jubilee Family Church of Oskaloosa Iowa | Religion-Related | $0 | $0 |
| 84 | Apept International INC | Religion-Related | $0 | $0 |
| 85 | Southeast Iowa Shrm Chapter | Employment | $0 | $0 |
| 86 | Trout Unlimited | Unclassified | $0 | $0 |
| 87 | Beacon Cemetery Association | Unclassified | $0 | $0 |
| 88 | Fraternal Order of Eagles | Unclassified | $0 | $0 |
| 89 | Iowa Yearly Meeting of Friends | Unclassified | $0 | $0 |
| 90 | Bethel Christian Reformed Church | Unclassified | $0 | $0 |
| 91 | American Legion Auxiliary | Unclassified | $0 | $0 |
| 92 | First Assembly of God | Unclassified | $0 | $0 |
| 93 | International Association of Lions Clubs | Unclassified | $0 | $0 |
| 94 | Oskaloosa Community Theater INC | Unclassified | $0 | $0 |
| 95 | New Hope Free Methodist Church | Unclassified | $0 | $0 |
| 96 | Oskaloosa Trees Forever | Environment | $0 | $0 |
| 97 | Pflag Oskaloosa | Unclassified | $0 | $0 |
| 98 | Refired INC | Youth Development | $0 | $0 |
| 99 | Department of Iowa Auxiliary to the Veterans of Foreign Wars | Public & Societal Benefit | $0 | $0 |
| 100 | Growing Empowered Together | Community Improvement & Capacity Building | $0 | $0 |