DouxProcess Directory
Add to your AI

Ask for any business in the US.

NAICS 813930 · Labor Unions and Similar Labor Organizations

you asked:

Labor union in Mason City, IA

11 labor union in Mason City, IA; 34 within 30 miles. Every listing checked against the issuer's record, in the published order.

  1. American Federation of State County & Municipal Employees

    Active501(c)(5) labor, agricultural or horticultural organization

    Mason City, IA

    Ask it
    Proof for American Federation of State County & Municipal Employees
    IRS exempt-organization registration
    IRS 420650475
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 420650475 → IRS search

  2. American Federation of State County & Municipal Employees

    Active501(c)(5) labor, agricultural or horticultural organization

    Mason City, IA

    Ask it
    Proof for American Federation of State County & Municipal Employees
    IRS exempt-organization registration
    IRS 421099571
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 421099571 → IRS search

  3. Bakery Confectionery Tobacco Workers and Grain Millers Intl Uni

    Active501(c)(5) labor, agricultural or horticultural organization

    Mason City, IA

    Ask it
    Proof for Bakery Confectionery Tobacco Workers and Grain Millers Intl Uni
    IRS exempt-organization registration
    IRS 420571086
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 420571086 → IRS search

  4. Brotherhood of Locomotive Engineers and Trainmen

    Active501(c)(5) labor, agricultural or horticultural organization

    Mason City, IA

    Ask it
    Proof for Brotherhood of Locomotive Engineers and Trainmen
    IRS exempt-organization registration
    IRS 237328658
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 237328658 → IRS search

  5. International Association of Fire Fighters

    Active501(c)(5) labor, agricultural or horticultural organization

    Mason City, IA

    Ask it
    Proof for International Association of Fire Fighters
    IRS exempt-organization registration
    IRS 426095935
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 426095935 → IRS search

  6. International Brotherhd - Boilrmkrs Ir Shp Bldrs Blcksmth Frgrs & Hlpr

    Active501(c)(5) labor, agricultural or horticultural organization

    Mason City, IA

    Ask it
    Proof for International Brotherhd - Boilrmkrs Ir Shp Bldrs Blcksmth Frgrs & Hlpr
    IRS exempt-organization registration
    IRS 426066360
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 426066360 → IRS search

  7. Iowa Farm Bureau Federation

    Active501(c)(5) labor, agricultural or horticultural organization

    Mason City, IA

    Ask it
    Proof for Iowa Farm Bureau Federation
    IRS exempt-organization registration
    IRS 420685004
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 420685004 → IRS search

  8. Mason City Education Association

    Active501(c)(5) labor, agricultural or horticultural organization

    Mason City, IA

    Ask it
    Proof for Mason City Education Association
    IRS exempt-organization registration
    IRS 420932426
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 420932426 → IRS search

  9. National Active and Retired Federal Employees Association

    Active501(c)(5) labor, agricultural or horticultural organization

    Mason City, IA

    Ask it
    Proof for National Active and Retired Federal Employees Association
    IRS exempt-organization registration
    IRS 426124950
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 426124950 → IRS search

  10. National Association of Fsa County Office Employees

    Active501(c)(5) labor, agricultural or horticultural organization

    Mason City, IA

    Ask it
    Proof for National Association of Fsa County Office Employees
    IRS exempt-organization registration
    IRS 426067489
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 426067489 → IRS search

  11. National Association of Letter Carriers Harmony Branch 471

    Active501(c)(5) labor, agricultural or horticultural organization

    Mason City, IA

    Ask it
    Proof for National Association of Letter Carriers Harmony Branch 471
    IRS exempt-organization registration
    IRS 237087341
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Mason City, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 237087341 → IRS search

  12. Brotherhood of Locomotive Engineers & Trainmen

    Active501(c)(5) labor, agricultural or horticultural organization

    Clear Lake, IA · 10 mi away

    Ask it
    Proof for Brotherhood of Locomotive Engineers & Trainmen
    IRS exempt-organization registration
    IRS 310954454
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Clear Lake, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 310954454 → IRS search

  13. Iowa Cattlemens Association

    Active501(c)(5) labor, agricultural or horticultural organization

    Clear Lake, IA · 10 mi away

    Ask it
    Proof for Iowa Cattlemens Association
    IRS exempt-organization registration
    IRS 421109536
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Clear Lake, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 421109536 → IRS search

  14. Brotherhood of Maintenance of Way Employees

    Active501(c)(5) labor, agricultural or horticultural organization

    Northwood, IA · 22 mi away

    Ask it
    Proof for Brotherhood of Maintenance of Way Employees
    IRS exempt-organization registration
    IRS 426121454
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Northwood, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 426121454 → IRS search

  15. Iowa Cattlemens Association

    Active501(c)(5) labor, agricultural or horticultural organization

    Marble Rock, IA · 20 mi away

    Ask it
    Proof for Iowa Cattlemens Association
    IRS exempt-organization registration
    IRS 510185465
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Marble Rock, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 510185465 → IRS search

  16. Iowa Cattlemens Association

    Active501(c)(5) labor, agricultural or horticultural organization

    Osage, IA · 22 mi away

    Ask it
    Proof for Iowa Cattlemens Association
    IRS exempt-organization registration
    IRS 421146456
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Osage, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 421146456 → IRS search

  17. Iowa Cattlemens Association

    Active501(c)(5) labor, agricultural or horticultural organization

    Northwood, IA · 22 mi away

    Ask it
    Proof for Iowa Cattlemens Association
    IRS exempt-organization registration
    IRS 237424009
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Northwood, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 237424009 → IRS search

  18. Iowa Farm Bureau Federation

    Active501(c)(5) labor, agricultural or horticultural organization

    Northwood, IA · 22 mi away

    Ask it
    Proof for Iowa Farm Bureau Federation
    IRS exempt-organization registration
    IRS 420686470
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Northwood, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 420686470 → IRS search

  19. Iowa Farm Bureau Federation

    Active501(c)(5) labor, agricultural or horticultural organization

    Garner, IA · 21 mi away

    Ask it
    Proof for Iowa Farm Bureau Federation
    IRS exempt-organization registration
    IRS 420293100
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Garner, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 420293100 → IRS search

  20. Iowa Farm Bureau Federation

    Active501(c)(5) labor, agricultural or horticultural organization

    Osage, IA · 22 mi away

    Ask it
    Proof for Iowa Farm Bureau Federation
    IRS exempt-organization registration
    IRS 420685007
    Issuer
    IRS
    Status
    Active
    Class
    501(c)(5) labor, agricultural or horticultural organization
    Checked
    Oct 23, 2026
    Where
    Osage, IA · serves Iowa
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Look up 420685007 → IRS search

More cities in Iowa

Des Moines 321Johnston 57Cedar Rapids 29Sioux City 22Waterloo 20Davenport 18Dubuque 14Iowa City 14Ames 10Burlington 10Ankeny 9Boone 9Creston 8Keokuk 8Marshalltown 8Bettendorf 7

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

Checked facts from public license files · How ranking works