Unknown & Unclassified nonprofits in Maryland

Unknown & Unclassified nonprofits in Maryland. Browse 10,672 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. Phi Sigma Sigma Inc

    EIN 823245014 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  2. Phi Sigma Sigma Inc

    EIN 825389441 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  3. Phi Sigma Sigma Inc

    EIN 900224950 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Phi Sigma Sigma Inc

    EIN 900224970 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  5. Phi Sigma Sigma Inc

    EIN 911774505 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  6. Phi Sigma Sigma Inc

    EIN 911774530 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Phi Sigma Sigma Inc

    EIN 911908681 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. Phi Sigma Sigma Inc

    EIN 911962256 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. Phi Sigma Sigma Inc

    EIN 911962257 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. Phi Sigma Sigma Inc

    EIN 912110929 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  11. Phi Sigma Sigma Inc - Beta Alpha Chapter

    EIN 520608979 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Phi Sigma Sigma Inc - Beta Rho Chapter

    EIN 237079764 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  13. Phi Sigma Sigma Inc - Beta Xi Chapter

    EIN 453236607 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  14. Phi Sigma Sigma Inc - Delta Eta Chapter

    EIN 581485432 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Phi Sigma Sigma Inc - Delta Iota Chapter

    EIN 581858590 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  16. Phi Sigma Sigma Inc - Delta Kappa Chapter

    EIN 650214026 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  17. Phi Sigma Sigma Inc - Epsilon Kappa Chapter

    EIN 581864117 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  18. Phi Sigma Sigma Inc - Epsilon Omicron Chapter

    EIN 581864083 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  19. Phi Sigma Sigma Inc - Gamma Iota Chapter

    EIN 582041454 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  20. Phi Sigma Sigma Inc - Gamma Nu Chapter

    EIN 271836924 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. Phi Sigma Sigma Inc - Gamma Zeta Chapter

    EIN 582007616 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Phi Sigma Sigma Inc - Iota Chi Chapter

    EIN 824685883 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Phi Sigma Sigma Inc - Iota Iota Chapter

    EIN 753224073 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  24. Phi Sigma Sigma Inc - Iota Nu Chapter

    EIN 800379277 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  25. Phi Sigma Sigma Inc - Iota Rho Chapter

    EIN 371768693 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  26. Phi Sigma Sigma Inc - Theta Beta Chapter

    EIN 570973592 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  27. Phi Sigma Sigma Inc - Theta Chi Chapter

    EIN 911908682 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  28. Phi Sigma Sigma Inc - Theta Xi Chapter

    EIN 650472454 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  29. Phi Sigma Sigma Inc - Xi Chapter

    EIN 526056451 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  30. Phi Sigma Sigma Inc - Zeta Delta Chapter

    EIN 650276440 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  31. Phi Sigma Sigma Inc - Zeta Tau Chapter

    EIN 582007631 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  32. Phi Sigma Sigma Inc - Zeta Zeta Chapter

    EIN 581908600 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  33. Phi Sigma Sigma Inc Sacramento Capital City Alumnae Ch

    EIN 825397785 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Phi Sigma Sigma Inc Theta Mu Chapter

    EIN 650668897 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Phi Sigma Sigma Iota Mu Chapter

    EIN 300416271 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Phi Sigma Sigma Iota Pi Chapter

    EIN 455184126 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Phi Sigma Sigma Las Vegas Alumnae Chapter

    EIN 760828180 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Phi Sigma Sigma National Housing Corporation

    EIN 650434520 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. Phi Sigma Sigma Sorority - Pi Chapter

    EIN 912110932 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. Phi Theta Kappa

    EIN 581579629 · Headquarters: Frederick, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Phi Upsilon Omicron - Gamma Lambda Chapter

    EIN 261099015 · Headquarters: College Park, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Philadelphia Yearly Meeting of Friends

    EIN 521549837 · Headquarters: Salisbury, MD, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  43. Philanthropy Works Inc

    EIN 933606650 · Headquarters: Olney, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Philip Michael of Firm Rock Maryland Family

    EIN 853847173 · Headquarters: Clarksburg, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Philip S & Adele S Brown Foundation Inc

    EIN 521649300 · Headquarters: Takoma Park, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  46. Philippine Assn of Metropolitan Washington Engineers

    EIN 521327107 · Headquarters: Silver Spring, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Philippines Missions Inc

    EIN 520902697 · Headquarters: Hagerstown, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  48. Philly Area Naturalist Guys

    EIN 232863271 · Headquarters: Rising Sun, MD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  49. Phoenix International Incorporated

    EIN 852466834 · Headquarters: La Plata, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. Phoenix Society Inc

    EIN 237152387 · Headquarters: ANNAPOLIS JUNCTION, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Photo Chemical Machining Institute

    EIN 237102765 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  52. Physicians for a National Health Program

    EIN 521812927 · Headquarters: Fulton, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Physicians for Social Responsibility Inc

    EIN 521213221 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Pi Kappa Alpha Fraternity

    EIN 383989333 · Headquarters: Phoenix, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  55. Pi Kappa Alpha Fraternity

    EIN 770656480 · Headquarters: Sunderland, MD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  56. Pi Kappa Alpha Fraternity

    EIN 934490693 · Headquarters: Mt Rainier, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Pi Kappa Alpha Fraternity Delta Psi Chapter

    EIN 352553731 · Headquarters: COLLEGE PARK, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  58. Pi Kappa Phi Fraternity Eta Phi Chapter

    EIN 521885152 · Headquarters: BALTIMORE, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  59. Pi Lambda Phi Fraternity

    EIN 465640292 · Headquarters: Frostburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  60. Pi Mu Epsilon Fraternity

    EIN 813915890 · Headquarters: CHESTERTOWN, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Pi Mu Epsilon Inc

    EIN 526070844 · Headquarters: COLLEGE PARK, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Pi Mu Epsilon Inc

    EIN 900148859 · Headquarters: BALTIMORE, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  63. Pi Mu Epsilon Inc

    EIN 900148861 · Headquarters: BALTIMORE, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Pi Mu Epsilon Inc

    EIN 900148862 · Headquarters: SALISBURY, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. Pi Mu Epsilon Inc

    EIN 900257637 · Headquarters: BALTIMORE, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  66. Pi Mu Epsilon Inc

    EIN 900257639 · Headquarters: EMMITSBURG, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Pi Mu Epsilon Inc

    EIN 912074936 · Headquarters: FREDERICK, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  68. Pi Mu Epsilon Inc

    EIN 912074939 · Headquarters: BALTIMORE, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. Pi Mu Epsilon Inc

    EIN 912076637 · Headquarters: BALTIMORE, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Pi Omega Foundation Inc

    EIN 521354108 · Headquarters: Baltimore, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  71. Pi Tau Sigma

    EIN 581516501 · Headquarters: Annapolis, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Pi Tau Sigma

    EIN 911877171 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Piano Technicians Guild of Balto

    EIN 463622900 · Headquarters: Westminster, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Pierre Fauchard Academy

    EIN 410648891 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  75. Pignon Christian Ministries

    EIN 991164055 · Headquarters: Okland, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  76. Pikesville Chamber of Commerce

    EIN 521263505 · Headquarters: PIKESVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  77. Pikeswood Civic Association

    EIN 800705967 · Headquarters: Randallstown, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Pikeville College PAD Prelaw Chapter

    EIN 260065574 · Headquarters: TOWSON, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Pinagkaisa Oneness

    EIN 562649852 · Headquarters: Gaithersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  80. Pine Grove Cemetery Co of Carroll County

    EIN 526044266 · Headquarters: Mount Airy, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  81. Pine Grove Village Community Association Inc

    EIN 526056556 · Headquarters: Pasadena, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. Pine Steppers

    EIN 521334046 · Headquarters: Ocean Pines, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Pine Tree Associates Inc

    EIN 526017028 · Headquarters: Annapolis, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Pine Valley Valleywood Community Association Inc

    EIN 237276195 · Headquarters: Timonium, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Pinefield Civic Association Inc

    EIN 237165725 · Headquarters: WALDORF, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Pines Community Improvement Assoc Inc

    EIN 520895448 · Headquarters: Arnold, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  87. Piney Mt Sportsmens Association Inc

    EIN 521881025 · Headquarters: Mount Savage, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  88. Pink House Inc

    EIN 874072944 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  89. Pioneer Hook & Ladder Company Inc

    EIN 526048251 · Headquarters: HAGERSTOWN, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. Pipe Creek Cemetery of the Church of the Brethren Inc

    EIN 520610539 · Headquarters: NEW WINDSOR, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Pipe Shop Relief Fund

    EIN 465264448 · Headquarters: Luke, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  92. Pirates Cove Race Club Corporation

    EIN 521986686 · Headquarters: Greenbelt, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Piscataway Conoy Confederacy and Sub Tribes Inc

    EIN 521285115 · Headquarters: Prince Frederick, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Pittsville Volunteer Fire Dept Inc

    EIN 526055638 · Headquarters: PITTSVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  95. Pius Ten Hunting Club

    EIN 274134034 · Headquarters: Woodbine, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Place for Children Inc

    EIN 521616673 · Headquarters: Baltimore, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. Planting Roots Foundation Inc

    EIN 832909502 · Headquarters: Cresaptown, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  98. Plasma Protein Therapeutics Assoc

    EIN 521800187 · Headquarters: ANNAPOLIS, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. Plate to Potential

    EIN 413423157 · Headquarters: Bivalve, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Playback Theater Inc

    EIN 222176709 · Headquarters: Columbia, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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