| Carpenters and Joiners #732 | | Oakland City | IN |
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| Gibson County Central Labor Union | | Princeton | IN |
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| Glass Bottle Blowers Association #179 | Oakland City Plastics | Oakland City | IN |
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| International Association of Machinists #1459 | Potter & Brumfield | Princeton | IN |
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| International Association of Machinists #2042 | | Mt.Carmel | IL |
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| Local #1060 | | | |
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| Local #1856 | | Mt.Carmel | IL |
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| United Mine Workers of America # 352 | Blackfoot Mine | Coe | IN |
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| United Mine Workers of America #1015 | Wright Mine | Yankeetown | IN |
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| United Mine Workers of America #1016 | Victoria Mine | Boonville | IN |
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| United Mine Workers of America #1189 | Squaw Creek Mine | Boonville | IN |
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| United Mine Workers of America #4343 | Blackfoot Mine | Petersburg | IN |
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| United Mine Workers of America #5179 | Enos Mine | Spurgeon | IN |
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| United Mine Workers of America #5584 | Kings Station Mine | Princeton | IN |
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| United Mine Workers of America #7661 | Tecumseh Mine | Lynnville | IN |
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| United Mine Workers of America #7693 | Ditney Hill Mine | Elberfeld | IN |
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| United Mine Workers of America #9926 | Lynnville Mine | Lynnville | IN |
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| United Mine Workers of America District 50 #13211 | Contel | Princeton | IN |
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| United Packinghouse Workers of America #172 | Emge | Ft. Branch | IN |
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