Unknown & Unclassified nonprofits in Texas

Unknown & Unclassified nonprofits in Texas. Browse 39,901 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. Siam Relief Foundation

    EIN 871837297 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  2. Sick Childrens Clinic Inc 1002 Ave A

    EIN 752209353 · Headquarters: Lubbock, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Sickle Cell Association of the Texas Gulf Coast

    EIN 741717720 · Headquarters: HOUSTON, TX, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  4. Sid W Richardson Foundation

    EIN 756015828 · Headquarters: Fort Worth, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  5. Sidancerally

    EIN 800388310 · Headquarters: livingston, TX, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  6. Sidewalk Advocates for Life Mcallen

    EIN 872107332 · Headquarters: MCALLEN, TX, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  7. Sidney F Jones Tuw

    EIN 016033203 · Headquarters: DALLAS, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  8. Sidney Webster Memorial Fund

    EIN 056008012 · Headquarters: DALLAS, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  9. Sienna Bruins

    EIN 931387289 · Headquarters: Missouri City, TX, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  10. Sienna Plantation Community Association Inc

    EIN 383953483 · Headquarters: Missouri City, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. Sigma Alpha Epsilon - Texas Omega

    EIN 271287844 · Headquarters: Wichita Falls, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  12. Sigma Alpha Epsilon Fraternity

    EIN 371846884 · Headquarters: Keller, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  13. Sigma Alpha Epsilon Fraternity

    EIN 460985905 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  14. Sigma Alpha Epsilon Fraternity

    EIN 475481718 · Headquarters: San Antonio, TX, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  15. Sigma Alpha Epsilon Fraternity

    EIN 823435350 · Headquarters: MESQUITE, TX, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  16. Sigma Alpha Epsilon Fraternity Texas Delta Chapter

    EIN 750809499 · Headquarters: DALLAS, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Sigma Alpha Epsilon Texas Rho

    EIN 741130611 · Headquarters: AUSTIN, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Sigma Alpha Mu Fraternity

    EIN 222406693 · Headquarters: College Station, TX, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  19. Sigma Alpha Mu Fraternity

    EIN 752592829 · Headquarters: Nacogdoches, TX, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  20. Sigma Alumni Corporation

    EIN 742545927 · Headquarters: Houston, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. Sigma Chi Fraternity

    EIN 272071939 · Headquarters: The Woodlands, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Sigma Chi Fraternity

    EIN 510185655 · Headquarters: Addison, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Sigma Chi Fraternity

    EIN 611674643 · Headquarters: HOUSTON, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  24. Sigma Chi Fraternity

    EIN 746081399 · Headquarters: Kingsville, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Sigma Chi Fraternity

    EIN 811822992 · Headquarters: Arlington, TX, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  26. Sigma Chi Fraternity Delta Mu Chapter

    EIN 756061665 · Headquarters: Dallas, TX, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  27. Sigma Chi Fraternity Delta Upsilon Chapter Inc

    EIN 480906286 · Headquarters: LEWISVILLE, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. Sigma Chi Fraternity Epsilon Nu Chapter Texas Tech University

    EIN 756036564 · Headquarters: LUBBOCK, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Sigma Chi Fraternity Epsilon Psi

    EIN 746085531 · Headquarters: Huntsville, TX, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  30. Sigma Chi Fraternity Eta Omega Chapter

    EIN 742020367 · Headquarters: Waco, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  31. Sigma Chi Fraternity Eta Upsilon Chapter

    EIN 510207538 · Headquarters: College Station, TX, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  32. Sigma Chi House Corp of Dallas

    EIN 751889058 · Headquarters: McKinney, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Sigma Delta Epsilon Graduate Womens in Science Inc

    EIN 991507745 · Headquarters: Richardson, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  34. Sigma Epsilon of Kappa Delta Foundation

    EIN 010799428 · Headquarters: Austin, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Sigma Epsilon of Kappa Delta House Corp

    EIN 742155975 · Headquarters: Austin, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  36. Sigma Epsilon of Kappa Delta Sorority

    EIN 742205939 · Headquarters: Austin, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. Sigma Gama Rho Sorority Inc

    EIN 271388387 · Headquarters: Grapevine, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Sigma Gamma Lambda Chapter of Alpha Phi Alpha Fraternity Inc

    EIN 824569394 · Headquarters: Cypress, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  39. Sigma Gamma Rho Soroity Inc

    EIN 902363550 · Headquarters: PFLUGERVILLE, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Sigma Gamma Rho Sorority

    EIN 272531695 · Headquarters: MARSHALL, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Sigma Gamma Rho Sorority

    EIN 841769011 · Headquarters: EL PASO, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Sigma Gamma Rho Sorority

    EIN 933497322 · Headquarters: GRAPEVINE, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Sigma Gamma Rho Sorority - Alpha Lambda Chapter

    EIN 262611504 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Sigma Gamma Rho Sorority Inc

    EIN 134347943 · Headquarters: BEAUMONT, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Sigma Gamma Rho Sorority Inc

    EIN 202438599 · Headquarters: HOUSTON, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Sigma Gamma Rho Sorority Inc

    EIN 264062207 · Headquarters: PLANO, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Sigma Gamma Rho Sorority Inc

    EIN 311023916 · Headquarters: AUSTIN, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Sigma Gamma Rho Sorority Inc

    EIN 311333124 · Headquarters: Spring, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Sigma Gamma Rho Sorority Inc

    EIN 311333127 · Headquarters: COLLEGE STATION, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Sigma Gamma Rho Sorority Inc

    EIN 311436568 · Headquarters: BEAUMONT, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Sigma Gamma Rho Sorority Inc

    EIN 364077673 · Headquarters: MISSOURI CITY, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Sigma Gamma Rho Sorority Inc

    EIN 364982510 · Headquarters: NACOGDOCHES, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Sigma Gamma Rho Sorority Inc

    EIN 463037914 · Headquarters: PLANO, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Sigma Gamma Rho Sorority Inc

    EIN 611856242 · Headquarters: San Antonio, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Sigma Gamma Rho Sorority Inc

    EIN 741981729 · Headquarters: HOUSTON, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Sigma Gamma Rho Sorority Inc

    EIN 746062889 · Headquarters: HOUSTON, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Sigma Gamma Rho Sorority Inc

    EIN 746062909 · Headquarters: WACO, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Sigma Gamma Rho Sorority Inc

    EIN 746063490 · Headquarters: SAN ANTONIO, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Sigma Gamma Rho Sorority Inc

    EIN 746084910 · Headquarters: HOUSTON, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Sigma Gamma Rho Sorority Inc

    EIN 752309184 · Headquarters: ARLINGTON, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Sigma Gamma Rho Sorority Inc

    EIN 756061086 · Headquarters: Arlington, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Sigma Gamma Rho Sorority Inc

    EIN 756061088 · Headquarters: MARSHALL, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Sigma Gamma Rho Sorority Inc

    EIN 832084864 · Headquarters: FORT WORTH, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Sigma Gamma Rho Sorority Inc

    EIN 833428362 · Headquarters: KILLEEN, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Sigma Gamma Rho Sorority Inc

    EIN 853220665 · Headquarters: SCHERTZ, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Sigma Gamma Rho Sorority Inc

    EIN 902100328 · Headquarters: DENTON, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Sigma Gamma Rho Sorority Inc

    EIN 912141088 · Headquarters: ARLINGTON, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Sigma Gamma Rho Sorority Inc

    EIN 934815679 · Headquarters: SAN ANTONIO, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Sigma Gamma Rho Sorority Inc

    EIN 990828833 · Headquarters: FORNEY, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Sigma Gamma Rho Sorority Inc Alpha Pi Sigma

    EIN 471276844 · Headquarters: FORT WORTH, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Sigma Gamma Rho Sorority Inc Lambda Omega Sigma Chapter

    EIN 901025426 · Headquarters: SPRING, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Sigma Gamma Rho Sorority Inc Mu Beta Sigma Alumnae Chapter

    EIN 364791428 · Headquarters: ROUND ROCK, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Sigma Gamma Rho Sorority Inc Southwestern Region

    EIN 742719245 · Headquarters: DALLAS, TX, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  74. Sigma Gamma Rho Sorority Incorporated

    EIN 901910453 · Headquarters: El Paso, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  75. Sigma Gamma Upsilon

    EIN 464662400 · Headquarters: Canyon, TX, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  76. Sigma Nu Fraternity

    EIN 352876586 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Sigma Nu Fraternity

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

  78. Sigma Nu Fraternity

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

  79. Sigma Organization

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

  80. 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

  81. 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

  82. 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

  83. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 742099350 · Headquarters: Beaumont, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 742613733 · Headquarters: San Antonio, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 742947715 · Headquarters: Bryan, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 746081401 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 751645222 · Headquarters: Denton, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 752862314 · Headquarters: McKinney, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 756057749 · Headquarters: DALLAS, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. Sigma Phi Epsilon Fraternity Texas Alpha Chapter

    EIN 741130614 · Headquarters: Austin, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Sigma Phi Epsilon Fraternity Texas Co Morty Mandel

    EIN 237328952 · Headquarters: Fulshear, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. Sigma Phi Lambda Alpha Upsilon Chapter

    EIN 851382258 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  93. Sigma Phi Lambda Inc

    EIN 200141068 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Sigma Phi Lambda Inc

    EIN 200182193 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Sigma Phi Lambda Inc

    EIN 201239450 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Sigma Phi Lambda Inc

    EIN 201239559 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. Sigma Phi Lambda Inc

    EIN 412212192 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  98. Sigma Phi Lambda Inc

    EIN 450542070 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Sigma Phi Lambda Inc

    EIN 450542071 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  100. Sigma Phi Lambda Inc

    EIN 743124244 · Headquarters: Corinth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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