| Business | Phone |
| Afm-Louisville Fed Musicians 1436 Bardstown Rd, Louisville 40204 | (502) 451-7512 |
| Amalgamated Transit Union 2222 S 9th St, Louisville 40208 | (502) 637-2037 |
| American Postal Workers Union 4116 Wahl Street Blvd, Louisville 40218 | (502) 491-3556 |
| Asbestos Workers 1734 Mellwood Ave, Louisville 40206 | (502) 893-4040 |
| Bricklayers Union 3715 Bardstown Rd 401, Louisville 40218 | (502) 451-4494 |
| Carpenters Local Union 4017 Dixie Hwy, Louisville 40216 | (502) 448-3270 |
| Central Labor Council 1244 S 4th St, Louisville 40203 | (502) 635-2867 |
| Communications Workers-America 1941 Bishop Ln 709, Louisville 40218 | (502) 458-1788 |
| Communications Workers-America 3006 Dixie Hwy, Louisville 40216 | (502) 448-8998 |
| Electrical Apprenticeship 4315 Preston Hwy 100, Louisville 40213 | (502) 581-9210 |
| Firemen & Oilers Local 320 6801 Dixie Hwy 122, Louisville 40258 | (502) 937-4155 |
| Graphic Communications Union 659 S 8th St, Louisville 40203 | (502) 583-2709 |
| Greater Louisville Bldg & Cnst 1734 Mellwood Ave, Louisville 40206 | (502) 894-9383 |
| Hotel & Rstrnt Employees 659 S 8th St, Louisville 40203 | (502) 589-9506 |
| Ibew 4315 Preston Hwy 102, Louisville 40213 | (502) 368-2568 |
| Ibew 906 Minoma Ave, Louisville 40217 | (502) 635-2611 |
| Indiana Ky Regional Council 900 W Market St 203, Louisville 40202 | (502) 569-6151 |
| International Assoc-Machinists 5330 S 3rd St 236, Louisville 40214 | (502) 368-2593 |
| International Assoc-Machinists 6019 Preston Hwy, Louisville 40219 | (502) 966-2409 |
| International Union-Oper Engrs 2902 Crittenden Dr, Louisville 40209 | (502) 636-1476 |
| Iron Workers Local Union 2441 Crittenden Dr, Louisville 40217 | (502) 637-8796 |
| Jefferson County Assn-Edctnl 4315 Preston Hwy # 101, Louisville 40213 | (502) 473-1525 |
| Kentucky Organizing Seiu 6801 Dixie Hwy, Louisville 40258 | (502) 995-0221 |
| Ky-W Va Conference-Teamsters 7711 Beulah Church Rd, Louisville 40228 | (502) 368-6847 |
| Laborers International Union 646 Phillips Ln, Louisville 40209 | (502) 375-0581 |
| Louisville Pro Firefighter's 400 Bakers Ln, Louisville 40214 | (502) 366-5227 |
| Machinists Lodge 824 S 2nd St, Louisville 40203 | (502) 587-1557 |
| Machinists Union 6019 Preston Hwy, Louisville 40219 | (502) 961-7772 |
| Labor 1031-Millwright Cnvyrs 3934 Dixie Hwy 410, Louisville 40216 | (502) 447-0420 |
| Nurses Professional Orgnztn 1169 Eastern Pkwy 2200, Louisville 40217 | (502) 459-3393 |
| Painters 519 Huron Ave, Louisville 40209 | (502) 366-2233 |
| Pari-Mutuel Clerks Union 2222 S 9th St, Louisville 40208 | (502) 635-2186 |
| Pipe Fitters 1317 Berry Blvd, Louisville 40215 | (502) 361-8492 |
| Pipe Fitters Insurance Fund 1313 Berry Blvd, Louisville 40215 | (502) 368-1683 |
| Pipe Fitters Joint Educational 2335 Millers Ln, Louisville 40216 | (502) 778-3380 |
| Plumbers & Gasfitters Union 1235 Bardstown Rd, Louisville 40204 | (502) 361-8492 |
| Road Sprinkler Fitters Local 8900 Kaprun Ct, Louisville 40220 | (502) 493-0500 |
| Roofers Local Union 7711 Beulah Church Rd, Louisville 40228 | (502) 231-3344 |
| Stagehands 119 W Breckinridge St, Louisville 40203 | (502) 587-7936 |
| General Drivers & Warehousemen 3813 Taylor Blvd, Louisville 40215 | (502) 368-5885 |
| Teamsters Local Union 7711 Beulah Church Rd, Louisville 40228 | (502) 231-9596 |
| United Automobile Workers 2702 Chamberlain Ln, Louisville 40245 | (502) 241-9491 |
| United Automobile Workers 3000 Fern Valley Rd, Louisville 40213 | (502) 969-9136 |
| United Food & Commercial Wrkrs 3330 Pinecroft Dr, Louisville 40219 | (502) 582-3508 |
| United Steel Workers-America 1517 1/2 Gagel Ave, Louisville 40216 | (502) 363-2070 |
| United Steelworkers Of America 1233 S 10th St, Louisville 40210 | (502) 635-6219 |