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. Sigma Nu Fraternity

    EIN 616036661 · Headquarters: BOWLING GREEN, KY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  2. Sigma Nu Fraternity

    EIN 630188930 · Headquarters: AUBURN, AL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. Sigma Nu Fraternity

    EIN 630937287 · Headquarters: BIRMINGHAM, AL, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  4. Sigma Nu Fraternity

    EIN 631031801 · Headquarters: HUNTSVILLE, AL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Sigma Nu Fraternity

    EIN 726027776 · Headquarters: RUSTON, LA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  6. Sigma Nu Fraternity

    EIN 730581049 · Headquarters: Tulsa, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Sigma Nu Fraternity

    EIN 746077304 · Headquarters: SAN MARCOS, TX, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  8. Sigma Nu Fraternity

    EIN 752190034 · Headquarters: Fort Worth, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Sigma Nu Fraternity

    EIN 800567726 · Headquarters: PITTSBURGH, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Sigma Nu Fraternity

    EIN 800719090 · Headquarters: Evans, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. Sigma Nu Fraternity

    EIN 810194570 · Headquarters: MISSOULA, MT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Sigma Nu Fraternity

    EIN 811810905 · Headquarters: GREENVILLE, NC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Sigma Nu Fraternity

    EIN 811870867 · Headquarters: Normal, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Sigma Nu Fraternity

    EIN 860055379 · Headquarters: Tucson, AZ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Sigma Nu Fraternity

    EIN 866038244 · Headquarters: Flagstaff, AZ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. Sigma Nu Fraternity

    EIN 900342034 · Headquarters: Akron, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Sigma Nu Fraternity

    EIN 900824346 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Sigma Nu Fraternity

    EIN 910574696 · Headquarters: Pullman, WA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  19. Sigma Nu Fraternity

    EIN 911503686 · Headquarters: CHENEY, WA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Sigma Nu Fraternity

    EIN 930280675 · Headquarters: CORVALLIS, OR, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  21. Sigma Nu Fraternity

    EIN 930280677 · Headquarters: Eugene, OR, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  22. Sigma Nu Fraternity

    EIN 946136603 · Headquarters: Clovis, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  23. Sigma Nu Fraternity Beta Zeta

    EIN 350882978 · Headquarters: LAFAYETTE, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Sigma Nu Fraternity C/o Dave Foreman

    EIN 830146325 · Headquarters: CHEYENNE, WY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Sigma Nu Fraternity Delta Delta Chapter

    EIN 240804142 · Headquarters: State College, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. Sigma Nu Fraternity Delta Omicron Chapter

    EIN 826024346 · Headquarters: Moscow, ID, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Sigma Nu Fraternity Epsilon Mu

    EIN 350884303 · Headquarters: INDIANAPOLIS, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. Sigma Nu Fraternity Epsilon Xi Chapter

    EIN 640304773 · Headquarters: OXFORD, MS, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Sigma Nu Fraternity Gamma Delta

    EIN 223395645 · Headquarters: Bedford, NH, USA · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990

  30. Sigma Nu Fraternity Gamma Kappa

    EIN 840404406 · Headquarters: LONGMONT, CO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Sigma Nu Fraternity Gamma Xi

    EIN 430519040 · Headquarters: ROLLA, MO, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  32. Sigma Nu Fraternity Home Association Inc

    EIN 581679853 · Headquarters: ATLANTA, GA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  33. Sigma Nu Fraternity Inc

    EIN 540628798 · Headquarters: LEXINGTON, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. Sigma Nu Fraternity Inc - Zeta Gamma Alumni Chapter

    EIN 861791799 · Headquarters: WILLOUGHBY, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  35. Sigma Nu Fraternity Incorporated

    EIN 562327355 · Headquarters: LYNCHBURG, VA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Sigma Nu Fraternity Nu Alpha Chapter

    EIN 208958810 · Headquarters: Fort Smith, AR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Sigma Nu Fraternity Nu Chapter

    EIN 480417720 · Headquarters: LAWRENCE, KS, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. Sigma Nu Fraternity- Delta Kappa

    EIN 932245581 · Headquarters: Newark, DE, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Sigma Nu Holding Association

    EIN 411859020 · Headquarters: MINNEAPOLIS, MN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. Sigma Nu House Bldg Assn

    EIN 450226719 · Headquarters: Hopkins, MN, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  41. Sigma Nu House Company

    EIN 830208449 · Headquarters: Cheyenne, WY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Sigma Nu House Company Inc

    EIN 420524715 · Headquarters: Boone, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Sigma Nu House Corporation of Bowling Green State University

    EIN 341583667 · Headquarters: Richfield, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Sigma Nu House Corporation of Columbia Mo

    EIN 430519030 · Headquarters: COLUMBIA, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  45. Sigma Nu Iota Kappa Chapter Housing Corporation

    EIN 237384355 · Headquarters: SAN JOSE, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  46. Sigma Nu Lambda Omicron

    EIN 465694036 · Headquarters: Irvine, CA, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  47. Sigma Nu Psi

    EIN 272228487 · Headquarters: JACKSON, MS, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  48. Sigma Nu Theta Chapter

    EIN 630188940 · Headquarters: TUSCALOOSA, AL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Sigma of Florida

    EIN 472449215 · Headquarters: Winter Park, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Sigma Omega Alumni Association

    EIN 873122300 · Headquarters: Clinton, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Sigma Omega Upsilon

    EIN 934742424 · Headquarters: Columbia, SC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Sigma Omicron House Corporation of Kappa Delta Sorority a Virginia Corporation

    EIN 366101386 · Headquarters: CHAMPAIGN, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. Sigma Omicron Housing Association

    EIN 730758187 · Headquarters: TULSA, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. Sigma Omicron Upsilon Chapter

    EIN 911935321 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Sigma Organization

    EIN 465410843 · Headquarters: San Antonio, TX, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  56. Sigma Phi Alpha Dental Hygeine Honor Society Inc

    EIN 237038059 · Headquarters: loxahatchee groves, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Sigma Phi Alpha Dental Hygiene Honor

    EIN 900061984 · Headquarters: Rockford, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 016023507 · Headquarters: PORTLAND, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  59. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 020741888 · Headquarters: Tampa, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 036013571 · Headquarters: Williston, VT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 043294423 · Headquarters: SOMERSET, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 046151923 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 066087862 · Headquarters: Bridgeport, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 161103957 · Headquarters: williamsville, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 166073770 · Headquarters: Binghamton, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 226091067 · Headquarters: New York, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 230678363 · Headquarters: BERWICK, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 232577677 · Headquarters: Williamsport, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 236426591 · Headquarters: Philadelphia, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 237052981 · Headquarters: Pinellas Park, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 260185712 · Headquarters: Waukesha, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 272489621 · Headquarters: Joplin, MO, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 274509873 · Headquarters: Warner Robins, GA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 300052072 · Headquarters: Louisville, KY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 311277169 · Headquarters: Blue Ash, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 316067761 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 341623759 · Headquarters: Quakertown, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 341624759 · Headquarters: Lima, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 352430028 · Headquarters: Chula Vista, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  80. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 356067819 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363022027 · Headquarters: PALATINE, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363755567 · Headquarters: Morrow, GA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363755596 · Headquarters: Burbank, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363769232 · Headquarters: Hurst, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363769235 · Headquarters: Johnson City, TN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363769236 · Headquarters: TYLER, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363792963 · Headquarters: Pittsburgh, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363794141 · Headquarters: Bangor, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363804934 · Headquarters: Dunwoody, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363886390 · Headquarters: Bryn Mawr, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363890608 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363909803 · Headquarters: Hastings, NE, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363954111 · Headquarters: Cheyenne, WY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363955993 · Headquarters: Paramus, NJ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 364017891 · Headquarters: Roanoke, VA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 364019472 · Headquarters: Hattiesburg, MS, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  97. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 364032438 · Headquarters: Chicago Heights, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  98. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 364034143 · Headquarters: Overland Park, KS, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 364039962 · Headquarters: woodland hills, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 364052754 · Headquarters: Corpus Christi, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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