REGION THREE - Essex • Hudsen • Hunterdon • Mercer • Middlesex • Somerset • Union • Warren
| Region 3 | County |
| City of Orange | Essex |
| East Orange Housing Authority | Essex |
| Fairfield Township | Essex |
| Millburn Township | Essex |
| North Caldwell | Essex |
| Nutley | Essex |
| Nutley BOE | Essex |
| Secaucus Housing Authority | Hudson |
| Clinton Township | Hunterdon |
| High Bridge Borough | Hunterdon |
| Readington-Lebanon Sewerage Authority | Hunterdon |
| Township of Union | Hunterdon |
| Hamilton Township Fire district No 9 | Mercer |
| Trenton Parking Authority | Mercer |
| West Windsor Township | Mercer |
| Metuchen Borough | Middlesex |
| Monroe Township | Middlesex |
| New Brunswick | Middlesex |
| New Brunswick Parking Authority | Middlesex |
| North Brunswick | Middlesex |
| Piscataway Township | Middlesex |
| Bedminster Township | Somerset |
| Bernards Township | Somerset |
| Bernards Twp Sewrage Authority | Somerset |
| Bernardsville Borough | Somerset |
| Bernardsville Public Library | Somerset |
| Branchburg Township | Somerset |
| Franklin Township | Somerset |
| Montgomery Township | Somerset |
| Watchung Borough | Somerset |
| Elizabeth | Union |
| Elizabeth Parking Authority | Union |
| Fanwood Borough | Union |
| Kenilworth | Union |
| Mountainside Borough | Union |
| Mountainside Public Library | Union |
| Scotch Plains Township | Union |
| Summit City | Union |
| Union Township | Union |
| Westfield Town | Union |
| Pohatcong Township | Warren |
| Washington Borough | Warren |
| Washington Township | Warren |
