Nonprofits in Castlewood, South Dakota

Nonprofits in Castlewood, South Dakota. Browse 9 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. American Legion

    EIN 466015495 · Headquarters: Castlewood, SD, US · Public & Societal Benefit · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  2. Big Soiux Guys & Gals 4-H Club

    EIN 142011410 · Headquarters: Castlewood, SD, US · Youth Development · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  3. Castlewood Cemetery Association

    EIN 466012949 · Headquarters: CASTLEWOOD, SD, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Castlewood Community Foundation

    EIN 822466393 · Headquarters: CASTLEWOOD, SD, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Castlewood Education Foundation

    EIN 204655784 · Headquarters: CASTLEWOOD, SD, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Castlewood Historical Society

    EIN 460402371 · Headquarters: CASTLEWOOD, SD, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  7. Glacial Lakes Motorcycle Club

    EIN 020600549 · Headquarters: Castlewood, SD, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Opdahl Farm Mutual Insurance Co

    EIN 460173784 · Headquarters: CASTLEWOOD, SD, USA · Mutual & Membership Benefit · Latest available filing year: 2010 · Primary form: IRS Form 990

  9. Strayhorse Kids 4-H Club

    EIN 900337866 · Headquarters: Castlewood, SD, US · Youth Development · Latest available filing year: 2013 · Primary form: IRS Form 990-N