| Business | Phone |
| American Postal Workers Union 411 17th St, Lake Charles 70601 | (337) 439-5249 |
| Boiler Makers Local 135 W 18th St, Lake Charles 70601 | (337) 436-9488 |
| Carpenter's Piledrivers Local 149 W 18th St, Lake Charles 70601 | (337) 439-2706 |
| Communications Workers-America 3409 Hodges St, Lake Charles 70605 | (337) 477-3407 |
| Electrical Workers Health 3000 Highway 90 E, Lake Charles 70615 | (337) 436-1282 |
| Ibew 3000 Highway 90 E, Lake Charles 70615 | (337) 436-3324 |
| Independent Employees Union 1601 Oregon St, Lake Charles 70607 | (337) 478-4663 |
| International Assoc-Machinists 330 Belden St, Lake Charles 70601 | (337) 433-2000 |
| International Longshoremen's 1032 Railroad Ave, Lake Charles 70601 | (337) 439-4401 |
| International Longshoremen's 420 Church St, Lake Charles 70601 | (337) 433-2610 |
| International Union-Oper Engrs 130 W 18th St, Lake Charles 70601 | (337) 436-7878 |
| La Federation Of Teachers Pge 3000 Highway 90 E, Lake Charles 70615 | (337) 497-9494 |
| Laborers Construction Union 1300 3rd St, Lake Charles 70601 | (337) 439-2702 |
| Operating Engineer's Local 314 Bilbo St, Lake Charles 70601 | (337) 433-8255 |
| Painters Local Union 533 11th St, Lake Charles 70601 | (337) 436-5625 |
| Plumbers & Steamfitters 2013 Ryan St, Lake Charles 70601 | (337) 436-4373 |
| Plumbers & Steamfitters 3116 Center St, Lake Charles 70601 | (337) 436-4570 |
| Plumbers & Steamfitters 822 N Lake Shore Dr, Lake Charles 70601 | (337) 433-1447 |