Unknown & Unclassified nonprofits

Unknown & Unclassified nonprofits. Browse 557,756 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. Massachusetts Association of Behavioral Health Systems

    EIN 043056868 · Headquarters: Belmont, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. Massachusetts Association of Buyer Agents Inc

    EIN 043204728 · Headquarters: Lowell, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Massachusetts Association of Campground Owners Inc

    EIN 042800860 · Headquarters: SUTTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  4. Massachusetts Association of Cardiovas Cular & Pulmonary Rehabilitation Inc

    EIN 043013181 · Headquarters: NORTH ATTLEBORO, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Massachusetts Association of Community Development Corporation

    EIN 042759909 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. Massachusetts Association of Contributory Retirement Systemsinc

    EIN 237411603 · Headquarters: SPRINGFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Massachusetts Association of Cosmetology Schools Inc

    EIN 043075418 · Headquarters: Malden, MA, US · Unknown & Unclassified · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  8. Massachusetts Association of Criminal Justice Education Corp

    EIN 461635133 · Headquarters: FITCHBURG, MA, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  9. Massachusetts Association of Day Care Agencies

    EIN 042774227 · Headquarters: Worcester, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  10. Massachusetts Association of Electrologists

    EIN 042580672 · Headquarters: SOMERSET, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Massachusetts Association of Future Farm

    EIN 043130486 · Headquarters: DIGHTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Massachusetts Association of Guardians Ad Litem Inc

    EIN 043198386 · Headquarters: Milford, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  13. Massachusetts Association of Hazard Material Technicians Inc

    EIN 043250894 · Headquarters: RANDOLPH, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  14. Massachusetts Association of Health Boards Inc

    EIN 042774252 · Headquarters: WELLESLEY HILLS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Massachusetts Association of Health Plans Inc

    EIN 222518016 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  16. Massachusetts Association of Insurance Agents Inc

    EIN 043172159 · Headquarters: MILFORD, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  17. Massachusetts Association of Italian American Police Officers Inc

    EIN 042921583 · Headquarters: BURLINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  18. Massachusetts Association of Land Surveyors & Civil Engineers Inc

    EIN 042616384 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. Massachusetts Association of Landscape Professionals Inc

    EIN 042591662 · Headquarters: MEDFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  20. Massachusetts Association of Lawn Care Professionals Inc

    EIN 043081084 · Headquarters: STOW, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  21. Massachusetts Association of Nurse Anesthesiology

    EIN 042588873 · Headquarters: Altamonte Springs, FL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Massachusetts Association of Occupational Health Nurses Incorpo

    EIN 042606262 · Headquarters: Auburn, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  23. Massachusetts Association of Physician Associates Inc

    EIN 046382689 · Headquarters: Westford, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  24. Massachusetts Association of Realtors Inc

    EIN 041591030 · Headquarters: FOXBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  25. Massachusetts Association of Realtors Inc Charitable Foundation

    EIN 223148563 · Headquarters: FOXBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  26. Massachusetts Association of Residential Care Homes

    EIN 043176140 · Headquarters: Woburn, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Massachusetts Association of School Superintendents Inc

    EIN 042518540 · Headquarters: BEDFORD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. Massachusetts Association of Science Supervisors

    EIN 042592065 · Headquarters: MARLBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  29. Massachusetts Association of Science Teachers Inc

    EIN 237304290 · Headquarters: GOSHEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  30. Massachusetts Association of Sewage Pumping Contractors Inc

    EIN 042772311 · Headquarters: Lowell, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  31. Massachusetts Association of Vocational Admin Inc

    EIN 223007752 · Headquarters: Marlborough, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  32. Massachusetts Associations of Orthodontists

    EIN 800651368 · Headquarters: STOUGHTON, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Massachusetts Attorneys Title Group Inc

    EIN 262882545 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990

  34. Massachusetts Banker Association Group Insurance Trust

    EIN 042628271 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  35. Massachusetts Bankers Association Charitable Foundation Inc

    EIN 043325424 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  36. Massachusetts Bankers Association Inc

    EIN 041589780 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. Massachusetts Bar Association

    EIN 041589785 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. Massachusetts Bar Institute Inc

    EIN 043293798 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. Massachusetts Bay Council Navy League of the United States Inc

    EIN 042783171 · Headquarters: WELLESLEY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. Massachusetts Bay Health Care Trust Fund

    EIN 043235427 · Headquarters: LEXINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. Massachusetts Bay Organization Development Learning Group

    EIN 471481627 · Headquarters: West Roxbury, MA, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  42. Massachusetts Bay Railroad Enthusiasts Inc

    EIN 237243300 · Headquarters: Andover, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. Massachusetts Bay Victory Riders Incorporated

    EIN 811498610 · Headquarters: Norfolk, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  44. Massachusetts Beach Buggy Association Inc

    EIN 046113094 · Headquarters: MANSFIELD, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Massachusetts Beta-upsilon Alumni Association

    EIN 222534422 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  46. Massachusetts Beverage Association Inc C/O BCB Government Relations

    EIN 237430214 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. Massachusetts Bicycle Coalition Incorporated

    EIN 042692252 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. Massachusetts Biotechnology Council Inc

    EIN 222693047 · Headquarters: CAMBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Massachusetts Boating & Yacht Club Association

    EIN 046056456 · Headquarters: Peabody, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  50. Massachusetts Branch of the International Dyslexia Association

    EIN 237290540 · Headquarters: PRIDES CROSSING, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  51. Massachusetts Breast Cancer Coalition Inc

    EIN 043144053 · Headquarters: FRANKLIN, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  52. Massachusetts Bricklayers & Masons Health & Welfare Fund

    EIN 042145367 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. Massachusetts British Iron Association Inc

    EIN 043085321 · Headquarters: Chelmsford, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Massachusetts Broadcasters Assoc Inc

    EIN 237312139 · Headquarters: DALTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. Massachusetts Budget and Policy Center Inc

    EIN 042967537 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  56. Massachusetts Building Congress Inc

    EIN 042127289 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. Massachusetts Business Professionals of America

    EIN 042638360 · Headquarters: CHARLTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. Massachusetts Business Roundtable

    EIN 042695705 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. Massachusetts Call & Volunteer Firefighters Association Inc

    EIN 043244354 · Headquarters: Sherborn, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Massachusetts Camera Naturalists

    EIN 365056683 · Headquarters: Wrentham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Massachusetts Career Development Association

    EIN 881200314 · Headquarters: Lowell, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Massachusetts Center for Progress Inc

    EIN 334764174 · Headquarters: BEVERLY, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  63. Massachusetts Chapter Americans for Democratic Action Inc

    EIN 462367499 · Headquarters: Needham Heights, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  64. Massachusetts Chapter National Academy of Elder Law Attorneys Inc

    EIN 043154964 · Headquarters: NEWTONVILLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. Massachusetts Chapter of the American Academy of Pediatrics (MCAAP)

    EIN 042786447 · Headquarters: Newton, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Massachusetts Chapter of the American Co

    EIN 043215357 · Headquarters: BIRMINGHAM, AL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  67. 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

  68. Massachusetts Chapter of the American Needlepoint Guild Inc

    EIN 042581785 · Headquarters: Beverly, MA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  69. Massachusetts Chapter of the American Planning Association

    EIN 510152000 · Headquarters: HOLYOKE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. Massachusetts Chapter of the Institute of Transportation Engine

    EIN 820988911 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  71. Massachusetts Chapter of the Inter Assoc of Assessing Officers Inc

    EIN 043311850 · Headquarters: Lowell, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Massachusetts Charitable Fire Society

    EIN 042305919 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  73. Massachusetts Charitable Mechanic Association

    EIN 042023566 · Headquarters: QUINCY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  74. Massachusetts Charitable Society C/o Wave Equity Partners

    EIN 041589975 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. Massachusetts Chemistry & Technology Alliance Inc

    EIN 043157284 · Headquarters: Upton, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  76. Massachusetts Chiefs of Police Associati

    EIN 042595447 · Headquarters: SOUTH GRAFTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. Massachusetts Citizens Against the Death Penalty Fund Inc

    EIN 042790946 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Massachusetts Citizens for Life Inc

    EIN 237185782 · Headquarters: WALPOLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. Massachusetts Clubhouse Coalition Inc

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

  80. Massachusetts Coalition for Adult Education Inc

    EIN 223016440 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  81. Massachusetts Coalition for Independent Work Inc

    EIN 854218737 · Headquarters: Medford, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  82. Massachusetts Coalition of Nurse Practitioners Inc

    EIN 043156335 · Headquarters: LITTLETON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  83. Massachusetts Coalition of Police

    EIN 042791706 · Headquarters: MILLBURY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Massachusetts Coalition of Police Local 172 West Boylston Police Department

    EIN 042963849 · Headquarters: WEST BOYLSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Massachusetts Collectors & Treasurers Association Inc

    EIN 042657178 · Headquarters: NORTHBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. Massachusetts College of Art and Design Foundation Inc

    EIN 042742359 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. Massachusetts College of Emergency Physicians

    EIN 042697431 · Headquarters: Natick, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  88. Massachusetts Communities Action Network Inc

    EIN 042863903 · Headquarters: DORCHESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. Massachusetts Community College Council

    EIN 510173054 · Headquarters: Worcester, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. Massachusetts Computer Using Educators Inc

    EIN 222831177 · Headquarters: BEDFORD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Massachusetts Concrete & Aggregate Producers Association Inc

    EIN 042515687 · Headquarters: CHICOPEE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  92. Massachusetts Construction Advancement Program

    EIN 237326022 · Headquarters: FRAMINGHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Massachusetts Continuing Legal Education Inc

    EIN 042453466 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Massachusetts Convention Fandom Inc

    EIN 042636422 · Headquarters: Framingham, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Massachusetts Correction Officers Health and Welfare Fund

    EIN 043147584 · Headquarters: MINNEAPOLIS, MN, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  96. Massachusetts Correctional Legal Services Inc Dba Prisoners' Legal Svcs

    EIN 042523362 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. Massachusetts Council for the Social Studies Inc

    EIN 237073973 · Headquarters: MARSHFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  98. Massachusetts Council of Community Hospitals Inc

    EIN 043116067 · Headquarters: BURLINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  99. Massachusetts Council of Human Services Providers Inc

    EIN 042597297 · Headquarters: FRAMINGHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. Massachusetts Council on Fam Mediation

    EIN 042897930 · Headquarters: SOUTHBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

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