Unknown & Unclassified nonprofits in Oregon

Unknown & Unclassified nonprofits in Oregon. Browse 8,031 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. Sid & Karen Deboer Family Foundation

    EIN 871679528 · Headquarters: ASHLAND, OR, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  2. Sidney Irrigation Cooperative

    EIN 930638559 · Headquarters: JEFFERSON, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  3. Sightseers

    EIN 842890276 · Headquarters: Salem, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Sigma Alpha Epsilon Fraternity

    EIN 264499087 · Headquarters: Adams, OR, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  5. Sigma Alpha Epsilon Fraternity Sae at Willamette University

    EIN 833769120 · Headquarters: SALEM, OR, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  6. Sigma Building Corporation

    EIN 936031539 · Headquarters: Tigard, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Sigma Chapter of Kappa Delta Rho

    EIN 811136853 · Headquarters: Corvallis, OR, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  8. Sigma Chi Building Association

    EIN 936026158 · Headquarters: EUGENE, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Sigma Chi Fraternity Beta Iota Chapter

    EIN 930123625 · Headquarters: EUGENE, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Sigma Gamma Rho Sorority Inc

    EIN 815458412 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Sigma Nu - DT Alumni Chapter

    EIN 815269937 · Headquarters: CORVALLIS, OR, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  12. Sigma Nu Fraternity

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

  13. Sigma Nu Fraternity

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

  14. Sigma Omicron Upsilon Chapter

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

  15. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 943467738 · Headquarters: Hillsboro, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Sigma Phi Epsilon Fraternity Alumni Oregon Beta Chapter

    EIN 930280690 · Headquarters: EUGENE, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Sigma Phi Epsilon Fraternity Oregon Alpha Chapter

    EIN 930280680 · Headquarters: Corvallis, OR, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  18. Sigma Phi Gamma International Sorority Inc

    EIN 043222923 · Headquarters: Lake Oswego, OR, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  19. Sigma Phi Gamma International Sorority Inc

    EIN 936026903 · Headquarters: Aloha, OR, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  20. Sigma Phi Gamma International Sorority Inc

    EIN 936031930 · Headquarters: Beaverton, OR, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  21. Sigma Phi Gamma International Sorority Inc

    EIN 936042195 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  22. Sigma Phi Gamma International Sorority Inc

    EIN 936099224 · Headquarters: Lake Oswego, OR, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  23. Sigma Pi Fraternity International Inc Omega Chapter

    EIN 930241124 · Headquarters: PENDLETON, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Sigma Theta Tau Inc

    EIN 930680969 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  25. Sigma Theta Tau International Inc

    EIN 352734576 · Headquarters: Eugene, OR, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  26. Sigma Xi Sosc

    EIN 931108666 · Headquarters: Ashland, OR, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  27. Signatory Painting Contractors Organization Inc

    EIN 931093216 · Headquarters: AUMSVILLE, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  28. Signatory Painting Contractors Organization Industry Promotion

    EIN 931097173 · Headquarters: AUMSVILLE, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Silent Echo Theater Company Llc

    EIN 811405451 · Headquarters: Sisters, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Silicon Forest Karate Club

    EIN 921959232 · Headquarters: Beaverton, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Silver Creek District Improvement Co Inc

    EIN 936031544 · Headquarters: Enterprise, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Silver Falls Education Association

    EIN 930999132 · Headquarters: Silverton, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Silver Lake Community Development Corporation

    EIN 931073800 · Headquarters: Silver Lake, OR, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  34. Silver Wave Chapter 18

    EIN 800654239 · Headquarters: Tillamook, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Silverfish Review Press

    EIN 931141597 · Headquarters: Eugene, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Silverton Area Chamber of Commerce

    EIN 930327439 · Headquarters: SILVERTON, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  37. Silverton Cemetery Association

    EIN 930683434 · Headquarters: Silverton, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Silverton Country Historical Society

    EIN 931031523 · Headquarters: Silverton, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Silverton Flywheels Scholarship Fund

    EIN 800876035 · Headquarters: Molalla, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Silverton Health Foundation

    EIN 930913392 · Headquarters: SILVERTON, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. Silverton Murals Society

    EIN 931100833 · Headquarters: SILVERTON, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Silverton Runners Club

    EIN 930832642 · Headquarters: Silverton, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Silverton Together Inc

    EIN 931018660 · Headquarters: Silverton, OR, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  44. Silvies Club

    EIN 936032683 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Single Trees Square Dance Club of Eugene Oregon

    EIN 930885162 · Headquarters: Eugene, OR, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  46. Sior Oregon Inc C/o Transpacific Dk Investments Llc

    EIN 262395230 · Headquarters: LAKE OSWEGO, OR, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  47. Siskiyou Audubon Society

    EIN 930866572 · Headquarters: Grants Pass, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Siskiyou Chapter American Rock Garden Society

    EIN 943124997 · Headquarters: Central Point, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. Siskiyou Chapter Native Plant Society of Oregon

    EIN 931099927 · Headquarters: ASHLAND, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Siskiyou Community Health Center

    EIN 930628804 · Headquarters: GRANTS PASS, OR, United States · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Siskiyou Decorative Artists

    EIN 931074761 · Headquarters: Rogue River, OR, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  52. Siskiyou Fraternity

    EIN 930696424 · Headquarters: ROGUE RIVER, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Siskiyou Singers

    EIN 930875009 · Headquarters: ASHLAND, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  54. Siskiyou Sports Car Club Inc

    EIN 930564745 · Headquarters: MEDFORD, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Sister Network

    EIN 463829776 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  56. Sisters Area Chamber of Commerce

    EIN 930729390 · Headquarters: SISTERS, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. Sisters Habitat for Humanity

    EIN 931039346 · Headquarters: SISTERS, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. Sisters in Law

    EIN 471501849 · Headquarters: Walterville, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Sisters of Mary of Kakamega

    EIN 273160112 · Headquarters: Bend, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Sisters of the Road Inc

    EIN 930748169 · Headquarters: PORTLAND, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  61. Sisters Rodeo Association

    EIN 930716745 · Headquarters: SISTERS, OR, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  62. Sisters Snogofers

    EIN 800503853 · Headquarters: Sisters, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  63. Sisterspirit

    EIN 911669299 · Headquarters: portland, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Siuslaw Outreach Services

    EIN 943061005 · Headquarters: FLORENCE, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. Siuslaw Pioneer Museum Association Llc

    EIN 237328335 · Headquarters: FLORENCE, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Sixes Rural Fire Protection District

    EIN 930888538 · Headquarters: SIXES, OR, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  67. Ski to Sea Oregon Council of Higher Degrees

    EIN 931329397 · Headquarters: Bend, OR, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  68. Skipping Stones

    EIN 931095484 · Headquarters: EUGENE, OR, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  69. Skiyente Ski Club

    EIN 911306507 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Sky View Middle School PTSA

    EIN 931293565 · Headquarters: Bend, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Sky Vista Road Maintenance

    EIN 814248118 · Headquarters: Amity, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Skyhawk Wrestling Club

    EIN 463553515 · Headquarters: Tigard, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Skylands Water Company

    EIN 930554313 · Headquarters: Lake Oswego, OR, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  74. Skyline Pool Inc

    EIN 454324973 · Headquarters: West Linn, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Skyline PTA

    EIN 936039406 · Headquarters: PORTLAND, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  76. Skyline Snowmobile Club

    EIN 911724717 · Headquarters: Weston, OR, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  77. Slopes & Trails Inc

    EIN 931032978 · Headquarters: Medford, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Slow Food USA Inc

    EIN 352330833 · Headquarters: Corvallis, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Smhs Booster Club

    EIN 930884617 · Headquarters: MEDFORD, OR, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  80. Smiling Hearts

    EIN 461108994 · Headquarters: Aumsville, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Smith College Club of Oregon

    EIN 237402724 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Smith Rock Wrestling

    EIN 262327436 · Headquarters: Redmond, OR, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  83. Snake River Sportsmen Inc

    EIN 930836164 · Headquarters: Ontario, OR, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  84. SNJM Educational Ministries Corporation

    EIN 990763398 · Headquarters: Marylhurst, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Snow Foundation

    EIN 931093986 · Headquarters: Newberg, OR, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  86. So Cal Bandits Softball Organization

    EIN 453732885 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  87. Soap Creek Schoolhouse Foundation

    EIN 930712069 · Headquarters: Corvallis, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. Soaring Spirit Therapeutic Equestrian Center

    EIN 770313074 · Headquarters: Eugene, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Social Advance

    EIN 822138502 · Headquarters: Eugene, OR, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  90. Socido World Cultures

    EIN 421936387 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Society for Information Management Portland Chapter

    EIN 931316927 · Headquarters: Portland, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  92. Society for Inherited Metabolic Disorders

    EIN 930721765 · Headquarters: TROUTDALE, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Society for Marketing Professional Services

    EIN 931025506 · Headquarters: PORTLAND, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  94. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 930575624 · Headquarters: Springfield, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 931012922 · Headquarters: Grants Pass, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 931122068 · Headquarters: Newport, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 936037648 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. Society for Preservation & Encrgmnt of Barbershop Quartet Singing Amer

    EIN 260017357 · Headquarters: West Linn, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Society for Preservation & Encrgmnt of Barbershop Quartet Singing Amer

    EIN 936029965 · Headquarters: Salem, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Society for Preservation & Encrgmnt of Barbershop Quartet Singing Amer

    EIN 936044261 · Headquarters: Newberg, OR, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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