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. Optimist International

    EIN 510192510 · Headquarters: Fort Worth, TX, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  2. Optimist International

    EIN 510192523 · Headquarters: Lafayette, CO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  3. Optimist International

    EIN 510200023 · Headquarters: Auburn Hills, MI, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  4. Optimist International

    EIN 510200091 · Headquarters: Albuquerque, NM, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  5. Optimist International

    EIN 510200108 · Headquarters: Shawano, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  6. Optimist International

    EIN 510200120 · Headquarters: KALONA, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Optimist International

    EIN 510205976 · Headquarters: Charlotte, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. Optimist International

    EIN 510212894 · Headquarters: wheat ridge, CO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. Optimist International

    EIN 510212929 · Headquarters: Sandersville, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. Optimist International

    EIN 510212933 · Headquarters: Oswego, IL, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  11. Optimist International

    EIN 510212967 · Headquarters: New Middletown, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Optimist International

    EIN 510212978 · Headquarters: MARYVILLE, TN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  13. Optimist International

    EIN 510218877 · Headquarters: Fort Morgan, CO, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Optimist International

    EIN 510219158 · Headquarters: GREELEY, CO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  15. Optimist International

    EIN 510219238 · Headquarters: TABOR, IA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  16. Optimist International

    EIN 510219269 · Headquarters: Rochester, MN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  17. Optimist International

    EIN 521241164 · Headquarters: London, KY, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  18. Optimist International

    EIN 521275007 · Headquarters: Mechanicsville, MD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  19. Optimist International

    EIN 521333194 · Headquarters: Manassas, VA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  20. Optimist International

    EIN 521363332 · Headquarters: Phoenix, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Optimist International

    EIN 526046228 · Headquarters: Salisbury, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Optimist International

    EIN 526048973 · Headquarters: OLNEY, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  23. Optimist International

    EIN 526054463 · Headquarters: Saint Louis, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  24. Optimist International

    EIN 526083645 · Headquarters: Prince Frederick, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  25. Optimist International

    EIN 541376294 · Headquarters: Fairfax, VA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Optimist International

    EIN 541479942 · Headquarters: Virginia Beach, VA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  27. Optimist International

    EIN 541593411 · Headquarters: Chesterfield, VA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Optimist International

    EIN 546054006 · Headquarters: Alexandria, VA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Optimist International

    EIN 546054872 · Headquarters: Chesapeake, VA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Optimist International

    EIN 546058853 · Headquarters: Chesterfield, VA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  31. Optimist International

    EIN 546073613 · Headquarters: HOPEWELL, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  32. Optimist International

    EIN 546074624 · Headquarters: Danville, VA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Optimist International

    EIN 546075542 · Headquarters: FAIRFAX, VA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Optimist International

    EIN 560771782 · Headquarters: Charlotte, NC, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  35. Optimist International

    EIN 561391256 · Headquarters: Wilson, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Optimist International

    EIN 561391260 · Headquarters: New London, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Optimist International

    EIN 561592039 · Headquarters: Wilson, NC, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  38. Optimist International

    EIN 562077654 · Headquarters: CHAPEL HILL, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  39. Optimist International

    EIN 566043029 · Headquarters: ASHEVILLE, NC, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  40. Optimist International

    EIN 566061277 · Headquarters: NORTH WILKESBORO, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Optimist International

    EIN 566061282 · Headquarters: Winston Salem, NC, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  42. Optimist International

    EIN 566061285 · Headquarters: ROCKY MOUNT, NC, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  43. Optimist International

    EIN 566062179 · Headquarters: Raleigh, NC, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  44. Optimist International

    EIN 566062529 · Headquarters: GREENVILLE, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Optimist International

    EIN 566063161 · Headquarters: GASTONIA, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Optimist International

    EIN 566094692 · Headquarters: Henderson, NC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  47. Optimist International

    EIN 566094982 · Headquarters: Charlotte, NC, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  48. Optimist International

    EIN 566096720 · Headquarters: Pittsboro, NC, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  49. Optimist International

    EIN 570782859 · Headquarters: ROCK HILL, SC, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  50. Optimist International

    EIN 570786917 · Headquarters: myrtle beach, SC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Optimist International

    EIN 576025054 · Headquarters: Rock Hill, SC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Optimist International

    EIN 576025213 · Headquarters: Spartanburg, SC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Optimist International

    EIN 576027111 · Headquarters: Sumter, SC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Optimist International

    EIN 576028365 · Headquarters: Charleston, SC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Optimist International

    EIN 576036540 · Headquarters: Lugoff, SC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. Optimist International

    EIN 581312044 · Headquarters: MACON, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Optimist International

    EIN 581367594 · Headquarters: CANTON, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  58. Optimist International

    EIN 581452746 · Headquarters: Jasper, GA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Optimist International

    EIN 581458533 · Headquarters: Summerville, GA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  60. Optimist International

    EIN 581458786 · Headquarters: Roanoke Rapids, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Optimist International

    EIN 581548868 · Headquarters: Trenton, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Optimist International

    EIN 581747291 · Headquarters: Macon, GA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  63. Optimist International

    EIN 581750233 · Headquarters: Matthews, NC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Optimist International

    EIN 582024969 · Headquarters: Clarkesville, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. Optimist International

    EIN 582114545 · Headquarters: St Louis, MO, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  66. Optimist International

    EIN 586034680 · Headquarters: Atlanta, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Optimist International

    EIN 586035934 · Headquarters: CEDARTOWN, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  68. Optimist International

    EIN 586042829 · Headquarters: Smyrna, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. Optimist International

    EIN 586042928 · Headquarters: Newnan, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Optimist International

    EIN 586043688 · Headquarters: Athens, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Optimist International

    EIN 586043821 · Headquarters: WARNER ROBINS, GA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  72. Optimist International

    EIN 586043828 · Headquarters: Tybee Island, GA, US · Unknown & Unclassified · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  73. Optimist International

    EIN 586071908 · Headquarters: Dacula, GA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Optimist International

    EIN 586073473 · Headquarters: Tucker, GA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  75. Optimist International

    EIN 592571810 · Headquarters: Lynn Haven, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  76. Optimist International

    EIN 592571815 · Headquarters: MIAMI LAKES, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Optimist International

    EIN 592715689 · Headquarters: Perry, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Optimist International

    EIN 596136857 · Headquarters: Saint Petersburg, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Optimist International

    EIN 596142959 · Headquarters: St Petersburg, FL, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  80. Optimist International

    EIN 596153225 · Headquarters: Lakeland, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Optimist International

    EIN 596155184 · Headquarters: PLANT CITY, FL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  82. Optimist International

    EIN 596168874 · Headquarters: Jacksonville, FL, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  83. Optimist International

    EIN 596178206 · Headquarters: Grand Ridge, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  84. Optimist International

    EIN 596208749 · Headquarters: Ocala, FL, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  85. Optimist International

    EIN 610298532 · Headquarters: Louisville, KY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Optimist International

    EIN 611310904 · Headquarters: Louisville, KY, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  87. Optimist International

    EIN 611427119 · Headquarters: Centennial, CO, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  88. Optimist International

    EIN 611428008 · Headquarters: Farmington, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. Optimist International

    EIN 611428716 · Headquarters: Belleville, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Optimist International

    EIN 616031264 · Headquarters: Frankfort, KY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Optimist International

    EIN 616034200 · Headquarters: Radcliff, KY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Optimist International

    EIN 616034333 · Headquarters: Bardstown, KY, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  93. Optimist International

    EIN 616035006 · Headquarters: Radcliff, KY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Optimist International

    EIN 616038431 · Headquarters: Wilder, KY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Optimist International

    EIN 621222758 · Headquarters: Kodak, TN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Optimist International

    EIN 621771882 · Headquarters: Clinton, TN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. Optimist International

    EIN 626042828 · Headquarters: Chattanooga, TN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  98. Optimist International

    EIN 626047450 · Headquarters: KNOXVILLE, TN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Optimist International

    EIN 626047971 · Headquarters: Kingsport, TN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Optimist International

    EIN 626048267 · Headquarters: Bolivar, TN, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

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