Nonprofits in Waltham, Massachusetts

Nonprofits in Waltham, Massachusetts. Browse 565 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. Kappa Delta Sorority - Theta Tau

    EIN 301167834 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  2. Kappa Sigma Fraternity

    EIN 262220860 · Headquarters: WALTHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  3. Kids Are Scientists Too Incorporated

    EIN 273404768 · Headquarters: Waltham, MA, US · Education · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  4. King Family Scholarship Fund Inc

    EIN 261624624 · Headquarters: Waltham, MA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  5. Kingsbury Temperance Fund

    EIN 046053279 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-PF

  6. Kisoboka Uganda

    EIN 474805281 · Headquarters: Waltham, MA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Kitty Haven Inc

    EIN 042623878 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  8. Knights of Columbus

    EIN 205359722 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Knights of Columbus

    EIN 237104422 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Knights of Columbus

    EIN 371579201 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Knights of Columbus

    EIN 811754120 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Knights of Columbus Building Association of Waltham Inc

    EIN 042636774 · Headquarters: Waltham, MA, US · Mutual & Membership Benefit · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  13. Laborers' International Union of North America - Local Union No560

    EIN 041472475 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  14. Lady Hawks Hoopsters Boosters Inc

    EIN 830843477 · Headquarters: Waltham, MA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Lamacchia Cares Foundation Inc

    EIN 923400879 · Headquarters: Waltham, MA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  16. Latinos En Accion Waltyham Ma Inc

    EIN 412119286 · Headquarters: WALTHAM, MA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  17. Lavana Productions Inc

    EIN 043479056 · Headquarters: WALTHAM, MA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  18. League of Women Voters of Massachusetts

    EIN 046053404 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. Learning Disabilities Worldwide Inc

    EIN 042441353 · Headquarters: WALTHAM, MA, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  20. Leva Tatidar Samaj Inc USA

    EIN 043228450 · Headquarters: Waltham, MA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  21. Lexington Ski Club Inc

    EIN 046152531 · Headquarters: Waltham, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  22. Life Changers Initiative International Inc

    EIN 814193670 · Headquarters: WALTHAM, MA, US · Community Improvement & Capacity Building · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  23. Life Empowerment for Pregnancy Choices Inc

    EIN 413059271 · Headquarters: Waltham, MA, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Life Focus Center of Charlestown Inc

    EIN 042687260 · Headquarters: WALTHAM, MA, US · Education · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  25. Life Giving Water International Inc

    EIN 472793644 · Headquarters: WALTHAM, MA, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  26. Lifechoice Donor Services Inc

    EIN 061631615 · Headquarters: Waltham, MA, USA · Health Care · Latest available filing year: 2020 · Primary form: IRS Form 990

  27. Lins Institute of Science

    EIN 833615372 · Headquarters: WALTHAM, MA, USA · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  28. Listening to Parents

    EIN 270401410 · Headquarters: Waltham, MA, US · Human Services · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  29. Live the Fast Inc

    EIN 471649733 · Headquarters: WALTHAM, MA, USA · Religion Related · Latest available filing year: 2019 · Primary form: IRS Form 990

  30. Love and Care International Inc

    EIN 993858117 · Headquarters: WALTHAM, MA, US · Food, Agriculture & Nutrition · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. M54 Inc

    EIN 863712479 · Headquarters: WALTHAM, MA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  32. Macarthur School Pto

    EIN 861083062 · Headquarters: Waltham, MA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Marion P Manzon Scholarship Corp

    EIN 810708885 · Headquarters: WALTHAM, MA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Maslows Light

    EIN 842308620 · Headquarters: Waltham, MA, US · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  35. Mass Island Corp

    EIN 993715939 · Headquarters: WALTHAM, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  36. Mass-ala

    EIN 043237159 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  37. Massachusetss Police Association Charity Fund Inc C/o Jon Bailey

    EIN 832724705 · Headquarters: WALTHAM, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. Massachusetts Academy of Family Physicians Foundation Inc

    EIN 813784060 · Headquarters: Waltham, MA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  39. Massachusetts Association of Ambulatory Surgery Centers Inc

    EIN 043173779 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  40. Massachusetts Association of Practicing Urologists Inc

    EIN 900015633 · Headquarters: WALTHAM, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  41. Massachusetts Association of School Personnel Administrators

    EIN 800686005 · Headquarters: Waltham, MA, US · Community Improvement & Capacity Building · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  42. Massachusetts Chapter of the American College of Physicians Inc

    EIN 222761118 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  43. Massachusetts Clubhouse Coalition Inc

    EIN 043204732 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. Massachusetts Defense Technology Initiative Inc

    EIN 204192918 · Headquarters: Waltham, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2014 · Primary form: IRS Form 990

  45. Massachusetts E-health Collaborative

    EIN 201913059 · Headquarters: WALTHAM, MA, USA · Employment · Latest available filing year: 2021 · Primary form: IRS Form 990-PF

  46. Massachusetts Gastroenterology Association Inc

    EIN 454169854 · Headquarters: WALTHAM, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  47. Massachusetts Health Data Consortium Inc

    EIN 042647615 · Headquarters: Waltham, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. Massachusetts Maniacs

    EIN 562303058 · Headquarters: Waltham, MA, US · Youth Development · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  49. Massachusetts Medical Benevolent Society

    EIN 237089741 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. Massachusetts Medical Society

    EIN 042050773 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Massachusetts Medical Society

    EIN 042193016 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  52. Massachusetts Medical Society

    EIN 042730284 · Headquarters: WALTHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Massachusetts Medical Society

    EIN 046148974 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Massachusetts Medical Society

    EIN 223369130 · Headquarters: WALTHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Massachusetts Medical Society

    EIN 223369133 · Headquarters: WALTHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Massachusetts Medical Society

    EIN 223369135 · Headquarters: WALTHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Massachusetts Medical Society

    EIN 223369138 · Headquarters: WALTHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Massachusetts Medical Society

    EIN 223369141 · Headquarters: WALTHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Massachusetts Medical Society

    EIN 223369142 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Massachusetts Medical Society

    EIN 223369166 · Headquarters: WALTHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Massachusetts Medical Society

    EIN 237206114 · Headquarters: WALTHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Massachusetts Medical Society

    EIN 510193209 · Headquarters: WALTHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Massachusetts Medical Society Alliance Inc

    EIN 237055291 · Headquarters: WALTHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Massachusetts Medical Society and Alliance Charitable Foundation

    EIN 223199624 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. Massachusetts Medical Society Charitable & Educational Fund

    EIN 046075905 · Headquarters: WALTHAM, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Massachusetts Medical Society Essex South District

    EIN 046290204 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  67. Massachusetts Neurologic Assoc Inc

    EIN 042763275 · Headquarters: WALTHAM, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  68. Massachusetts Open-water Swimming Association

    EIN 275555560 · Headquarters: Waltham, MA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Massachusetts Peer Review Organization Inc

    EIN 042920849 · Headquarters: WALTHAM, MA, USA · Health Care · Latest available filing year: 2012 · Primary form: IRS Form 990

  70. Massachusetts Police Association Inc C/o Jon Bailey

    EIN 042635521 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. Massachusetts Psychiatric Society Inc

    EIN 042383343 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  72. Massachusetts Radiological Society Inc

    EIN 237051966 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  73. Massachusetts Senior and Assisted Living Communities Foundation

    EIN 810809743 · Headquarters: WALTHAM, MA, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  74. Massachusetts Society of Addiction Medicine Inc

    EIN 020556564 · Headquarters: WALTHAM, MA, USA · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  75. Massachusetts Society of Anesthesiologists Inc

    EIN 046180165 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  76. Massachusetts Society of Clinical Oncologists Inc

    EIN 042863899 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. Massachusetts Society of Radiologic Technologists Inc

    EIN 046190252 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  78. Massachusetts Society of Traditional Chinese Med

    EIN 850533742 · Headquarters: Waltham, MA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  79. Matthew F Daigle Foundation

    EIN 821692888 · Headquarters: Waltham, MA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  80. Maureen Ministries International Inc

    EIN 861367345 · Headquarters: Waltham, MA, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Maxcen Housing Society Inc Massachusetts Branch

    EIN 320191811 · Headquarters: Waltham, MA, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990

  82. Mbaitu Inc

    EIN 842498907 · Headquarters: Waltham, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  83. Mcclary Family Foundation Inc

    EIN 850955900 · Headquarters: WALTHAM, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  84. McDevitt PTO

    EIN 872989099 · Headquarters: Waltham, MA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Md Waltham Youth Wrestling Inc

    EIN 823015810 · Headquarters: WALTHAM, MA, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Mercer Family Foundation

    EIN 201982204 · Headquarters: Waltham, MA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  87. Merlin Charitable Foundation

    EIN 464351193 · Headquarters: WALTHAM, MA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  88. Metalwerx Inc

    EIN 134261443 · Headquarters: Waltham, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. Middlesex Human Service Agency Inc

    EIN 042626387 · Headquarters: WALTHAM, MA, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. Mightydrum Inc

    EIN 824894285 · Headquarters: WALTHAM, MA, US · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Military Order of the Purple Heart of the USA

    EIN 611698310 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Mind First Foundation

    EIN 461357012 · Headquarters: WALTHAM, MA, USA · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Ministerio Central Casa Del Alfarero Inc

    EIN 461700621 · Headquarters: WALTHAM, MA, USA · Religion Related · Latest available filing year: 2015 · Primary form: IRS Form 990-EZ

  94. Ministerio Palabra Uncion Y Fuego Ebenezer Inc

    EIN 821287652 · Headquarters: WALTHAM, MA, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  95. Missionica Ebenezer Inc

    EIN 931577673 · Headquarters: Waltham, MA, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Modern Quilt Guild Inc

    EIN 473692715 · Headquarters: Waltham, MA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Motorheads Car Club

    EIN 871105766 · Headquarters: WALTHAM, MA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  98. Mr Owl Foundation C/o Foster Dykema Cabot & Co

    EIN 320397570 · Headquarters: WALTHAM, MA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  99. Multicultural Neurobehavioral Rehabilitation Center Inc

    EIN 043492115 · Headquarters: WALTHAM, MA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. National Affordable Housing Foundation Schenectady Inc

    EIN 223160793 · Headquarters: WALTHAM, MA, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990

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