Region 4 Local Unions
Below is a list of the local unions located in UAW Region 4.
| Local | Unit City Location | Unit State Location | Website |
| 9 | Milwaukee | Wisconsin | Local 9 |
| 13 | Dubuque | Iowa | |
| 31 | Kansas City | Kansas | Local 31 |
| 72 | Kenosha Racine | Wisconsin | Local 72 |
| 74 | Albia Ottumwa | Iowa | Local 74 |
| 75 | Milwaukee | Wisconsin | |
| 79 | Milan | Illinois | |
| 82 | Racine | Wisconsin | |
| 94 | Dubuque | Iowa | Local 94 |
| 95 | Beloit Janesville Whitewater | Wisconsin | Local 95 |
| 120 | Cresco | Iowa | |
| 125 | Buffalo Circles Pines Hopkins Plymouth Spring Lake Park | Minnesota | |
| 180 | Racine | Wisconsin | |
| 186 | Hudson | Colorado | |
| 241 | Duluth | Minnesota | |
| 249 | Claycomo Shawnee | Minnesota Kansas | Local 249 |
| 270 | Clive Perry | Iowa | |
| 281 | Davenport | Iowa | Local 281 |
| 282 | Arnold Bridgeton Desoto Foristell O'Fallen St. Peters Wentzville | Missouri | |
| 291 | Oshkosh | Wisconsin | |
| 349 | Eveleth Hibbing Grand Rapids Virginia | Minnesota | |
| 407 | West Allis | Wisconsin | |
| 431 | Bennett | Colorado | |
| 434 | Moline | Illinois | |
| 450 | Des Moines | Iowa | |
| 469 | Oak Creek | Wisconsin | |
| 551 | Chicago | Illinois | Local 551 |
| 565 | Peoria | Illinois | |
| 578 | Oshkosh | Wisconsin | |
| 579 | Danville | Illinois | |
| 588 | Bedford Park Chicago Heights Sauk Village | Illinois | |
| 592 | Rochelle Rockford | Illinois | Local 592 |
| 616 | Cedar Rapids | Iowa | |
| 646 | Fond du Lac | Wisconsin | |
| 691 | St. Louis | Missouri | |
| 710 | Edwardsville Kansas City | Kansas | |
| 710 | Blue Springs Chillicothe Columbia Excelsior Springs Kansas City Kirksville Riverside | Missouri | |
| 718 | Rockford | Illinois | |
| 719 | La Grange | Illinois | |
| 722 | Hudson Menomonee | Wisconsin | |
| 751 | Decatur | Illinois | |
| 766 | Englewood | Colorado | |
| 803 | Rockford | Illinois | |
| 807 | Burlington | Iowa | |
| 833 | Kohler | Wisconsin | Local 833 |
| 838 | Cedar Falls Waterloo | Iowa | |
| 844 | Vermont | Illinois | |
| 865 | East Moline Sterling | Illinois | |
| 867 | Alberta Lea Austin | Minnesota | |
| 890 | Morton Grove | Illinois | |
| 893 | Conrad Marshalltown | Iowa | Local 893 |
| 904 | Mendota | Illinois | |
| 958 | Winona | Minnesota | |
| 974 | Delavan Mason City Pekin Pontiac | Illinois | Local 974 |
| 997 | Newton | Iowa | |
| 1023 | Rockford | Illinois | |
| 1024 | Cedar Rapids | Iowa | |
| 1076 | Sheboygan | Wisconsin | |
| 1088 | Mendota | Illinois | |
| 1092 | Milwaukee | Wisconsin | |
| 1102 | Green Bay | Wisconsin | |
| 1178 | Naperville | Illinois | |
| 1237 | Burlington | Iowa | |
| 1268 | Belvidere Sycamore | Illinois | Local 1268 |
| 1291 | Plymouth | Wisconsin | |
| 1349 | Cedar Rapids | Iowa | |
| 1391 | East Dubuque | Iowa | |
| 1414 | East Moline | Illinois | |
| 1540 | Jefferson Perry | Iowa | |
| 1576 | Beloit | Wisconsin | |
| 1613 | Monticello | Iowa | |
| 1672 | Des Moines | Iowa | |
| 1761 | Belvidere | Illinois | |
| 1887 | St. Louis | Missouri | |
| 1896 | Davenport | Iowa | |
| 1930 | Wentzville | Missouri | |
| 1982 | Dyersville | Iowa | |
| 2020 | Stevens Point | Wisconsin | Local 2020 |
| 2056 | Cherry Valley | Illinois | |
| 2096 | Elwood Pontiac Schaumburg | Illinois | |
| 2114 | Bolingbrook | Illinois | |
| 2125 | Rochester | Minnesota | |
| 2128 | Danville | Illinois | |
| 2132 | Oshkosh | Wisconsin | |
| 2201 | Freeport | Illinois | |
| 250 | Wentzville | Missouri | Local 2250 |
| 2261 | Freeport | Illinois | |
| 2282 | Moline | Illinois | |
| Rock Island | |||
| 2320 | Chicago & La Grange Des Moines Madison Mankato | Illinois Iowa Wisconsin Minnesota | |
| 2323 | Ottawa | Illinois | |
| 2366 | Coffeyville | Kansas | |
| 2379 | Jefferson | Missouri | |
| 2384 | Shelbyville | Illinois | |
| 3212 | Chicago | Illinois |