| J.H. Ladew | Newark | NJ |
| Jno. W. Ferguson | Paterson | NJ |
| Joe Manara E Building | Manville | NJ |
| Johansen March | Rahway | NJ |
| Johansen March | New Brunswick | NJ |
| Johansen March | Newark | NJ |
| John A. Roebling's Sons | Roebling | NJ |
| John A. Roebling's Sons | Trenton | NJ |
| John A. Roebling's Sons | Kinkora | NJ |
| John B. Hilgerts Sons | Rio Grande | NJ |
| John Boyle & Company | Bayonne | NJ |
| John D. Cutter & Company | Newark | NJ |
| John E. Diament | Cedarville | NJ |
| John E. Thropp Sons | Trenton | NJ |
| John Fenwick School | Salem | NJ |
| John F. Kennedy Hospital | Edison | NJ |
| John Gilber Plumbing | Newark | NJ |
| John H. Cooney | Harrison | NJ |
| John L. Reid | Newark | NJ |
| John McShain | Trenton | NJ |
| John Mehl & Company | Jersey City | NJ |
| John Moses | Trenton | NJ |
| John Norman Plumbing & Heating | Sparta | NJ |
| John Pacilio Plumbing & Heating | Totowa | NJ |
| John R. Cooke | Paterson | NJ |
| John Repp Ice & Cold Storage | Glassboro | NJ |
| Johns Manville | Finderne | NJ |
| Johns Manville | Newark | NJ |
| Johns Manville | North Brunswick | NJ |
| Johns Manville | Manville | NJ |
| Johnson & Johnson | New Brunswick | NJ |
| Johnson School | Cherry Hill | NJ |
| John Stephenson | Elizabeth | NJ |
| Johnstowne Boiler Plant | Bordentown | NJ |
| John Waldron | New Brunswick | NJ |
| John Wanamaker Department Store | Moorestown | NJ |
| John W. Ferguson | Paterson | NJ |
| John W. Wallace | Hoboken | NJ |
| J. O. Ross Engineering | New Brunswick | NJ |
| Joseph A. McCollum | Marlton | NJ |
| Joseph Campbell | Camden | NJ |
| Joseph Dixon Crucible | Jersey City | NJ |
| Joseph Krauss | Union | NJ |
| Joseph L. Lamarra Plumbing | Camden | NJ |
| Joseph Stokes Rubber | Trenton | NJ |
| Joseph Toye | Bridgeton | NJ |
| Jos. Wharton Andover Furnace | Hibernia | NJ |
| Jos. Wharton Andover Furnace | Phillipsburg | NJ |
| J.R. Evans | Camden | NJ |
| J. Schmarzwalder & Sons | Hoboken | NJ |
