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. Phi Sigma Sigma

    EIN 581858571 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Phi Sigma Sigma

    EIN 581858576 · Headquarters: SYKESVILLE, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  3. Phi Sigma Sigma

    EIN 581858589 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Phi Sigma Sigma

    EIN 581858592 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  5. Phi Sigma Sigma

    EIN 581864056 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  6. Phi Sigma Sigma

    EIN 581864065 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Phi Sigma Sigma

    EIN 581864085 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  8. Phi Sigma Sigma

    EIN 581864091 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. Phi Sigma Sigma

    EIN 581864105 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. Phi Sigma Sigma

    EIN 581864109 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. Phi Sigma Sigma

    EIN 581864111 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  12. Phi Sigma Sigma

    EIN 581864115 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  13. Phi Sigma Sigma

    EIN 581864116 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  14. Phi Sigma Sigma

    EIN 581864118 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Phi Sigma Sigma

    EIN 581864123 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. Phi Sigma Sigma

    EIN 581864126 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  17. Phi Sigma Sigma

    EIN 581864128 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  18. Phi Sigma Sigma

    EIN 581864130 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. Phi Sigma Sigma

    EIN 581908624 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  20. Phi Sigma Sigma

    EIN 581908626 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Phi Sigma Sigma

    EIN 581908631 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Phi Sigma Sigma

    EIN 581908636 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  23. Phi Sigma Sigma

    EIN 581908638 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  24. Phi Sigma Sigma

    EIN 650584443 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  25. Phi Sigma Sigma

    EIN 753224072 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Phi Sigma Sigma - Beta Eta Chapter

    EIN 475518135 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Phi Sigma Sigma - Delta Phi Chapter

    EIN 581864075 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  28. Phi Sigma Sigma - Delta Xi Chapter

    EIN 581864062 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  29. Phi Sigma Sigma - Epsilon Alpha Chapter

    EIN 371376206 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  30. Phi Sigma Sigma Central Indiana Alumnae Club

    EIN 900426185 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  31. Phi Sigma Sigma Epsilon Chapter

    EIN 900428547 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Phi Sigma Sigma Inc

    EIN 236432249 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Phi Sigma Sigma Inc

    EIN 311254232 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Phi Sigma Sigma Inc

    EIN 364656209 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Phi Sigma Sigma Inc

    EIN 383801496 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Phi Sigma Sigma Inc

    EIN 453236484 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Phi Sigma Sigma Inc

    EIN 475532648 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Phi Sigma Sigma Inc

    EIN 530220898 · Headquarters: ELDERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. Phi Sigma Sigma Inc

    EIN 581864080 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Phi Sigma Sigma Inc

    EIN 582007633 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Phi Sigma Sigma Inc

    EIN 582014028 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Phi Sigma Sigma Inc

    EIN 582041443 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Phi Sigma Sigma Inc

    EIN 582041444 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Phi Sigma Sigma Inc

    EIN 582041445 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Phi Sigma Sigma Inc

    EIN 582041450 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Phi Sigma Sigma Inc

    EIN 650276389 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Phi Sigma Sigma Inc

    EIN 650276410 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. Phi Sigma Sigma Inc

    EIN 650276418 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  49. Phi Sigma Sigma Inc

    EIN 650276433 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Phi Sigma Sigma Inc

    EIN 650276438 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Phi Sigma Sigma Inc

    EIN 650276444 · Headquarters: Elkridge, MD, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  52. Phi Sigma Sigma Inc

    EIN 650337704 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Phi Sigma Sigma Inc

    EIN 650472446 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Phi Sigma Sigma Inc

    EIN 650472453 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Phi Sigma Sigma Inc

    EIN 650584432 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  56. Phi Sigma Sigma Inc

    EIN 650911832 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Phi Sigma Sigma Inc

    EIN 814291442 · Headquarters: Eldersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  58. Phi Sigma Sigma Inc

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

  59. Phi Sigma Sigma Inc

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

  60. Phi Sigma Sigma Inc

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

  61. Phi Sigma Sigma Inc

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

  62. Phi Sigma Sigma Inc

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

  63. Phi Sigma Sigma Inc

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

  64. Phi Sigma Sigma Inc

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

  65. Phi Sigma Sigma Inc

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

  66. Phi Sigma Sigma Inc

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

  67. Phi Sigma Sigma Inc

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

  68. 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

  69. 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

  70. 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

  71. 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

  72. 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

  73. 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

  74. 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

  75. 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

  76. 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

  77. 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

  78. 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

  79. 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

  80. 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

  81. 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

  82. 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

  83. 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

  84. 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

  85. 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

  86. 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

  87. 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

  88. 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

  89. 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

  90. 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

  91. 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

  92. 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

  93. 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

  94. 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

  95. Phi Sigma Sigma National Housing Corporation

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

  96. Phi Sigma Sigma Sorority - Pi Chapter

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

  97. Phi Sigma Society Beta Lambda Chapter

    EIN 237414614 · Headquarters: Normal, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  98. Phi Sigma Tau

    EIN 753214208 · Headquarters: Logan, UT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Phi Sigma Tau Gamma

    EIN 272920461 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  100. Phi Sigma Tau Kappa Chapter

    EIN 464606107 · Headquarters: N Dartmouth, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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