| Local Union | Counties |
| 894 – Akron | Medina, Portage, Summit |
| 245 – Ashtabula | Ashtabula |
| 1015 – Canton | Carroll, Stark, Wayne |
| 265 – Cincinnati | Brown, Clermont, Clinton, Hamilton in Ohio; Boone, Campbell, Kenton in Kentucky |
| 310 – Cleveland | Cuyahoga, Geauga, Lake |
| 860 – Cleveland | Cuyahoga, Geauga, Lake |
| 423 – Columbus | Fairfield, Fayette, Franklin, Hocking, Licking, Madison, Pickaway, Union |
| 1410 – Dayton | Champaign, Clark, Darke, Greene, Logan, Miami, Montgomery, Preble |
| 329 – Lima | Allen, Auglaize, Mercer, Paulding, Putnam, Shelby, Van Wert |
| 758 – Lorain | Lorain |
| 1216 – Mansfield | Ashland, Crawford, Knox, Morrow, Richland |
| 639 – Marietta | Monroe, Morgan, Washington |
| 574 – Marion | Delaware, Hancock, Hardin, Marion, Seneca, Wyandot |
| 534 – Middletown | Butler, Warren |
| 134 – Newcomerstown | Coshocton, Holmes, Tuscarawas |
| 83 – Portsmouth | Adams, Athens, Gallia, Highland, Jackson, Lawrence, Meigs, Pike, Ross, Scioto, Vinton |
| 480 – Sandusky | Erie, Huron, Ottawa, Sandusky |
| 809 – Steubenville | Columbiana, Harrison, Jefferson |
| 500 – Toledo | Defiance, Fulton, Henry, Lucas, Williams, Wood |
| 935 – Warren | Trumbull |
| 141 – Westerville | Westerville |
| 1149 Wheeling | Belmont |
| 530 – Zanesville | Guernsey, Muskingum, Noble, Perry |
