Nonprofits in Mason City, Iowa

Nonprofits in Mason City, Iowa. Browse 255 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.

Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.

Nonprofit profiles

  1. Kinney-lindstrom Foundation Inc

    EIN 426037351 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  2. Kiwanis Club of Mason City River City Foundation

    EIN 393344577 · Headquarters: MASON CITY, IA, US · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  3. Kiwanis International Inc

    EIN 237273434 · Headquarters: Mason City, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Knights of Columbus

    EIN 237546707 · Headquarters: Mason City, IA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  5. Knights of Columbus Council 1006

    EIN 420992679 · Headquarters: Mason City, IA, USA · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-EZ

  6. Knights Templar of the United States of America

    EIN 237618534 · Headquarters: Mason City, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Koester Non-profit Services

    EIN 823358385 · Headquarters: Mason City, IA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Laverna M Smedley Charitable Foundation

    EIN 611934955 · Headquarters: MASON CITY, IA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  9. League of Women Voters of North Iowa

    EIN 880645459 · Headquarters: MASON CITY, IA, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Lee Endowment Foundation C/o First Citizens Trust Co Na

    EIN 421074052 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  11. Lincoln Intermediate Parent Teacher Organization

    EIN 273938958 · Headquarters: Mason City, IA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  12. Living Free Ministries

    EIN 812509984 · Headquarters: MASON CITY, IA, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  13. M C C Health Education

    EIN 421357416 · Headquarters: Mason City, IA, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Macnider Art Museum Foundation

    EIN 421462661 · Headquarters: MASON CITY, IA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Mamas En Catacamas

    EIN 463387133 · Headquarters: Mason City, IA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  16. Mason City Athletic Booster Club

    EIN 421133345 · Headquarters: MASON CITY, IA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Mason City Chamber of Commerce

    EIN 420398820 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Mason City Chamber of Commerce Foundation

    EIN 421505507 · Headquarters: MASON CITY, IA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. Mason City Chapter 870 Women of the Moose

    EIN 237183624 · Headquarters: Mason City, IA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  20. Mason City Clinic P C Trust

    EIN 421369969 · Headquarters: Mason City, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  21. Mason City Community Housing Resource Board Inc

    EIN 421370727 · Headquarters: Mason City, IA, US · Mutual & Membership Benefit · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  22. Mason City Community School District 7-12 Pto

    EIN 273330215 · Headquarters: Mason City, IA, US · Education · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  23. Mason City Community Theatre

    EIN 237027000 · Headquarters: MASON CITY, IA, USA · Arts, Culture & Humanities · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  24. Mason City Downtown Association

    EIN 481256121 · Headquarters: MASON CITY, IA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  25. Mason City Family YMCA

    EIN 420680330 · Headquarters: MASON CITY, IA, USA · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990

  26. Mason City Farmers Market

    EIN 334124622 · Headquarters: Mason City, IA, US · Food, Agriculture & Nutrition · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Mason City Foundation

    EIN 421375606 · Headquarters: MASON CITY, IA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. Mason City Little League Inc

    EIN 421342767 · Headquarters: MASON CITY, IA, USA · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  29. Mason City Lodge 1328 Loyal Order of Moose

    EIN 420386600 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. Mason City Public Library Foundation Inc

    EIN 421263454 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Mason City Sister City Organization Inc

    EIN 593798987 · Headquarters: MASON CITY, IA, US · International, Foreign Affairs & National Security · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  32. Mason City Soccer Club

    EIN 465623679 · Headquarters: MASON CITY, IA, USA · Recreation & Sports · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  33. Mason City Swim Club

    EIN 237369788 · Headquarters: MASON CITY, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Mason City Veterans Memorial Assoc

    EIN 371481580 · Headquarters: MASON CITY, IA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Mason City York Rite Corporation

    EIN 833097522 · Headquarters: Mason City, IA, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Mason City Youth Football Association

    EIN 200098699 · Headquarters: MASON CITY, IA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Mason City Youth Hockey Assc Inc

    EIN 421083935 · Headquarters: MASON CITY, IA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. Masonic Temple Association of Mason City

    EIN 420776866 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  39. Mc-newman Post Prom

    EIN 991718130 · Headquarters: Mason City, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Meals on Wheels of Mason City Inc

    EIN 420954145 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  41. Mercy Health Services - Iowa Corp

    EIN 311373080 · Headquarters: MASON CITY, IA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. Mercy Medical Center - Sioux City Foundation

    EIN 141880022 · Headquarters: MASON CITY, IA, USA · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990

  43. MercyOne North Iowa Foundation

    EIN 421229151 · Headquarters: Mason City, IA, US · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. Midwest Racing

    EIN 461397131 · Headquarters: Mason City, IA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Mohawk Danzers

    EIN 920812022 · Headquarters: MASON CITY, IA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  46. Mrom

    EIN 994433716 · Headquarters: Mason City, IA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. My Happy Place

    EIN 462628458 · Headquarters: MASON CITY, IA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  48. My Happy Place Inc

    EIN 371959132 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  49. N Iowa Labor Council

    EIN 421223557 · Headquarters: Mason City, IA, US · Employment · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  50. National Active and Retired Federal Employees Association

    EIN 426124950 · Headquarters: Mason City, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. National Alliance on Mental Illness of North Iowa

    EIN 472728148 · Headquarters: MASON CITY, IA, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. National Association of Fsa County Office Employees

    EIN 426067489 · Headquarters: Mason City, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. National Association of Letter Carriers Harmony Branch 471

    EIN 237087341 · Headquarters: Mason City, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. National Association of Retired & Veteran Railway Employees

    EIN 251749637 · Headquarters: MASON CITY, IA, US · Public & Societal Benefit · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  55. National Exchange Club

    EIN 426076102 · Headquarters: MASON CITY, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. National Society of the Daughters of the American Revolution

    EIN 237027758 · Headquarters: Mason City, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. National Ttt Society

    EIN 426096016 · Headquarters: Mason City, IA, US · Mutual & Membership Benefit · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  58. Newman Alumni Corporation

    EIN 421277155 · Headquarters: MASON CITY, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Newman Catholic School System Found

    EIN 421078829 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Niacog Housing Trust Fund Inc

    EIN 452989334 · Headquarters: MASON CITY, IA, USA · Housing & Shelter · Latest available filing year: 2025 · Primary form: IRS Form 990

  61. Niad Center for Human Development Inc

    EIN 421080685 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. North Central Iowa Genealogical Society

    EIN 421197977 · Headquarters: Mason City, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. North Central Iowa Right to Life

    EIN 461150556 · Headquarters: Mason City, IA, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  64. North Iowa Alliance for the Mentally Ill Inc

    EIN 421237495 · Headquarters: MASON CITY, IA, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  65. North Iowa Area Community College Foundation

    EIN 237023677 · Headquarters: MASON CITY, IA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. North Iowa Association of Life Underwriters Inc

    EIN 426089351 · Headquarters: Mason City, IA, US · Mutual & Membership Benefit · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  67. North Iowa Band Festival Foundation

    EIN 421446860 · Headquarters: MASON CITY, IA, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  68. North Iowa Basketball Association

    EIN 460917422 · Headquarters: MASON CITY, IA, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. North Iowa Builders Exchange

    EIN 426071637 · Headquarters: MASON CITY, IA, US · Community Improvement & Capacity Building · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  70. North Iowa Child Abuse Prevention Council Inc

    EIN 421298784 · Headquarters: Mason City, IA, US · Crime & Legal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. North Iowa Christian School

    EIN 421234140 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. North Iowa Community Action Organization

    EIN 420921505 · Headquarters: Mason City, IA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  73. North Iowa Community Credit Union

    EIN 420806064 · Headquarters: MASON CITY, IA, USA · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990

  74. North Iowa Community Emergency Response Team Llc

    EIN 271128362 · Headquarters: Mason City, IA, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. North Iowa Corridor Economic Development Corporation

    EIN 753190471 · Headquarters: MASON CITY, IA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. North Iowa Corridor Housing Development Corporation

    EIN 874542830 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. North Iowa Dispute Settlement Center

    EIN 421228741 · Headquarters: Mason City, IA, US · Crime & Legal Related · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  78. North Iowa Fair Association

    EIN 420441660 · Headquarters: MASON CITY, IA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. North Iowa Figure Skating Club

    EIN 421242097 · Headquarters: Mason City, IA, USA · Recreation & Sports · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  80. North Iowa Landlords Association

    EIN 260836489 · Headquarters: MASON CITY, IA, US · Community Improvement & Capacity Building · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  81. North Iowa Long Term Disaster Recovery Committee

    EIN 371961715 · Headquarters: MASON CITY, IA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  82. North Iowa Pharmacy Inc

    EIN 421517085 · Headquarters: MASON CITY, IA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. North Iowa Spin

    EIN 823412981 · Headquarters: MASON CITY, IA, US · Recreation & Sports · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  84. North Iowa Touring Club

    EIN 421314390 · Headquarters: Mason City, IA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  85. North Iowa Transition and Employment Services Inc

    EIN 420951757 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. North Iowa Transition Center Inc

    EIN 421149822 · Headquarters: MASON CITY, IA, USA · Mental Health & Crisis Intervention · Latest available filing year: 2018 · Primary form: IRS Form 990

  87. North Iowa Vintage Auto Club

    EIN 205676782 · Headquarters: MASON CITY, IA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. North Iowa Volleyball Association

    EIN 851068178 · Headquarters: MASON CITY, IA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  89. North Iowa Youth Center Inc

    EIN 593802381 · Headquarters: MASON CITY, IA, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. North Iowa Youth for Christ

    EIN 521285889 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Northeast Iowa Local Workforce Development Board

    EIN 923074163 · Headquarters: MASON CITY, IA, USA · Employment · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. Northern Lights Alliance for the Homeless Inc

    EIN 421501295 · Headquarters: MASON CITY, IA, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Northiowa Outlaws Booster Club Inc

    EIN 205339357 · Headquarters: Mason City, IA, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  94. Northland Amateur Communications Group

    EIN 863481326 · Headquarters: Mason City, IA, US · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  95. Northwestern States Cement Employee Credit Union

    EIN 420443742 · Headquarters: MASON CITY, IA, USA · Public & Societal Benefit · Latest available filing year: 2015 · Primary form: IRS Form 990

  96. Oakland Mercy Hospital

    EIN 208072234 · Headquarters: MASON CITY, IA, US · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. Oakland Mercy Hospital Foundation

    EIN 311678345 · Headquarters: MASON CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  98. Oikourmene Religious Center

    EIN 237012998 · Headquarters: Mason City, IA, US · Religion Related · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  99. Order of the White Shrine of Jerusalem

    EIN 237514237 · Headquarters: Mason City, IA, US · Mutual & Membership Benefit · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  100. Parents Families and Friends of Lesbians and Gays North Iowa

    EIN 331076398 · Headquarters: Mason City, IA, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2015 · Primary form: IRS Form 990-N

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