DouxProcess Directory
Add to your AI

Ask for any business in the US.

NAICS 813910 · Business Associations

you asked:

Business association in Mason City, IA

11 business association in Mason City, IA; 33 within 30 miles. Every listing checked against the issuer's record, in the published order.

  1. Cerro Gordo County Medical Society

    Active501(c)(6) business league

    Mason City, IA

    Ask it
    Proof for Cerro Gordo County Medical Society
    IRS exempt-organization registration
    IRS 420821216
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 420821216 → IRS search

  2. Delta Kappa Gamma Society

    Active501(c)(6) business league

    Mason City, IA

    Ask it
    Proof for Delta Kappa Gamma Society
    IRS exempt-organization registration
    IRS 426096249
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 426096249 → IRS search

  3. Horsemen of Iowa Inc

    Active501(c)(6) business league

    Mason City, IA

    Ask it
    Proof for Horsemen of Iowa Inc
    IRS exempt-organization registration
    IRS 421229681
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 421229681 → IRS search

  4. Human Resources Association of North Iowa

    Active501(c)(6) business league

    Mason City, IA

    Ask it
    Proof for Human Resources Association of North Iowa
    IRS exempt-organization registration
    IRS 421314683
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 421314683 → IRS search

  5. Iowa Association of Women Police

    Active501(c)(6) business league

    Mason City, IA

    Ask it
    Proof for Iowa Association of Women Police
    IRS exempt-organization registration
    IRS 421184294
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 421184294 → IRS search

  6. Mason City Chamber of Commerce

    Active501(c)(6) business league

    Mason City, IA

    Ask it
    Proof for Mason City Chamber of Commerce
    IRS exempt-organization registration
    IRS 420398820
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 420398820 → IRS search

  7. Mason City Chamber of Commerce Foundation

    Active501(c)(3) public charity

    Mason City, IA

    Ask it
    Proof for Mason City Chamber of Commerce Foundation
    IRS exempt-organization registration
    IRS 421505507
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(3) public charity
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 421505507 → IRS search

  8. North Iowa Builders Exchange

    Active501(c)(6) business league

    Mason City, IA

    Ask it
    Proof for North Iowa Builders Exchange
    IRS exempt-organization registration
    IRS 426071637
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 426071637 → IRS search

  9. North Iowa Corridor Economic Development Corporation

    Active501(c)(6) business league

    Mason City, IA

    Ask it
    Proof for North Iowa Corridor Economic Development Corporation
    IRS exempt-organization registration
    IRS 753190471
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 753190471 → IRS search

  10. North Iowa Landlords Association

    Active501(c)(6) business league

    Mason City, IA

    Ask it
    Proof for North Iowa Landlords Association
    IRS exempt-organization registration
    IRS 260836489
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 260836489 → IRS search

  11. Visit Mason City Inc

    Active501(c)(6) business league

    Mason City, IA

    Ask it
    Proof for Visit Mason City Inc
    IRS exempt-organization registration
    IRS 452436698
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 452436698 → IRS search

  12. Clear Lake Chamber of Commerce

    Active501(c)(6) business league

    Clear Lake, IA · 10 mi away

    Ask it
    Proof for Clear Lake Chamber of Commerce
    IRS exempt-organization registration
    IRS 420478075
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Clear Lake, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 420478075 → IRS search

  13. Iowa State County Treasurers Association

    Active501(c)(6) business league

    Clear Lake, IA · 10 mi away

    Ask it
    Proof for Iowa State County Treasurers Association
    IRS exempt-organization registration
    IRS 680558324
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Clear Lake, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 680558324 → IRS search

  14. Rockwell Cooperative Telephone Association

    ActiveTax-exempt corporation registered in SAM.gov

    Rockwell, IA · 10 mi away

    Ask it
    Proof for Rockwell Cooperative Telephone Association
    SAM.gov registration
    SAM.gov W5BASDHNLA38
    Issuer
    SAM.gov
    Status
    Active
    Class
    Tax-exempt corporation registered in SAM.gov
    Expires
    May 29, 2027
    Checked
    Nov 2, 2026
    Where
    Rockwell, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → SAM.gov record

  15. Association for Persons IN Supported Employment

    Active501(c)(6) business league

    Klemme, IA · 20 mi away

    Ask it
    Proof for Association for Persons IN Supported Employment
    IRS exempt-organization registration
    IRS 421419086
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Klemme, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 421419086 → IRS search

  16. Garner Chamber of Commerce

    Active501(c)(6) business league

    Garner, IA · 21 mi away

    Ask it
    Proof for Garner Chamber of Commerce
    IRS exempt-organization registration
    IRS 421219477
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Garner, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 421219477 → IRS search

  17. Hancock County Economic Development Corporation

    Active501(c)(6) business league

    Garner, IA · 21 mi away

    Ask it
    Proof for Hancock County Economic Development Corporation
    IRS exempt-organization registration
    IRS 202714626
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Garner, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 202714626 → IRS search

  18. Iowa Association of County Conservation Boards

    Active501(c)(6) business league

    Osage, IA · 22 mi away

    Ask it
    Proof for Iowa Association of County Conservation Boards
    IRS exempt-organization registration
    IRS 421129519
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Osage, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 421129519 → IRS search

  19. Lake Mills Chamber Development Corporation

    Active501(c)(6) business league

    Lake Mills, IA · 25 mi away

    Ask it
    Proof for Lake Mills Chamber Development Corporation
    IRS exempt-organization registration
    IRS 421116685
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Lake Mills, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 421116685 → IRS search

  20. Northwood Economic Development Corporation

    Active501(c)(6) business league

    Northwood, IA · 22 mi away

    Ask it
    Proof for Northwood Economic Development Corporation
    IRS exempt-organization registration
    IRS 474877077
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(6) business league
    Checked
    Oct 23, 2026
    Where
    Northwood, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 474877077 → IRS search

More cities in Iowa

Des Moines 168Wdm 54Ankeny 35Cedar Rapids 29Urbandale 29Cedar Falls 27Davenport 24Waterloo 20Bettendorf 19Johnston 19Sioux City 19Ames 18Iowa City 18Dubuque 14Council Blfs 9West Des Moines 9

Free for people · nobody pays to rank. Run one of these businesses? Claim it free.

Checked facts from public license files · How ranking works