| Business | Phone |
| Afscme Council 31 212 S 1st St 102, Rockford 61104 | (815) 968-0447 |
| American Postal Workers Union 5225 Harrison Ave, Rockford 61125 | (815) 229-9080 |
| Uaw Sub-Regional 112 N 2nd St, Rockford 61107 | (815) 962-0601 |
| Carpenters Local Union 212 S 1st St, Rockford 61104 | (815) 963-7478 |
| Service Employee Intl Union 204 N Church St, Rockford 61101 | (815) 962-3738 |
| Sheet Metal Workers 3316 N Publishers Dr, Rockford 61109 | (815) 874-6641 |
| Rockford United Labor 212 S 1st St, Rockford 61104 | (815) 968-1411 |
| Plasterers & Cement Masons 212 S 1st St # 204, Rockford 61104 | (815) 873-0346 |
| Northwestern Il Building 4477 Linden Rd, Rockford 61109 | (815) 873-0437 |
| Musician's Union 119 N Church St 204, Rockford 61101 | (815) 965-2132 |
| Ibew 6820 Mill Rd, Rockford 61108 | (815) 398-6282 |
| International Assoc-Fire Fight 108 S 2nd St, Rockford 61104 | (815) 965-1458 |
| International Union-Oper Engrs 4477 Linden Rd, Rockford 61109 | (815) 874-4166 |
| Ironworkers Local Union 5640 Sockness Dr, Rockford 61109 | (815) 873-9180 |