Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Interchange 6 | Crossing | 26 | Middlesex | 40 33 20 N | 074 26 44 W |
| Interchange 7 | Crossing | 23 | Middlesex | 40 33 24 N | 074 27 43 W |
| Interchange 8 | Crossing | 19 | Middlesex | 40 33 12 N | 074 29 07 W |
| Interchange 8A | Crossing | 42 | Middlesex | 40 21 02 N | 074 28 25 W |
| Interchange 9 | Crossing | 10 | Middlesex | 40 32 30 N | 074 30 24 W |
| Ireland Brook | Stream | | Middlesex | 40 25 14 N | 074 29 07 W |
| Ireland Brook County Park | Park | 24 | Middlesex | 40 24 50 N | 074 28 14 W |
| Iresick Brook | Stream | | Middlesex | 40 23 56 N | 074 22 08 W |
| Irving Primary School | School | 37 | Middlesex | 40 30 09 N | 074 25 03 W |
| Irwin Elementary School | School | 30 | Middlesex | 40 25 38 N | 074 25 49 W |
| Iselin | Populated Place | 19 | Middlesex | 40 34 31 N | 074 19 21 W |
| Iselin Middle School | School | 23 | Middlesex | 40 34 13 N | 074 18 18 W |
| Iselin Station | Locale | 18 | Middlesex | 40 34 19 N | 074 19 20 W |
| J F Kennedy Medical Center | Hospital | 37 | Middlesex | 40 33 24 N | 074 20 60 W |
| J F Kennedy Memorial High School | School | 25 | Middlesex | 40 34 21 N | 074 18 13 W |
| J Fountain Junior Farm (historical) | Locale | 28 | Middlesex | 40 23 51 N | 074 19 04 W |
| J P Stevens High School | School | 36 | Middlesex | 40 34 50 N | 074 21 40 W |
| J R Cotrell Farm (historical) | Locale | 37 | Middlesex | 40 23 12 N | 074 17 09 W |
| James J Flynn Elementary School | School | 29 | Middlesex | 40 32 01 N | 074 17 05 W |
| James Madison Intermediate Elementary School | School | 45 | Middlesex | 40 35 05 N | 074 21 10 W |
| James Madison Primary Elementary School | School | 49 | Middlesex | 40 35 10 N | 074 21 15 W |
| James McDivitt Elementary School | School | 11 | Middlesex | 40 24 37 N | 074 18 04 W |
| James Monroe Elementary School | School | 37 | Middlesex | 40 32 26 N | 074 19 52 W |
| Jamesburg | Populated Place | 23 | Middlesex | 40 21 09 N | 074 26 25 W |
| Jamesburg County Park Conservation Area | Park | 22 | Middlesex | 40 23 12 N | 074 25 46 W |
| Jamesburg Gardens | Populated Place | 26 | Middlesex | 40 20 35 N | 074 25 14 W |
| Jamesburg Park | Populated Place | 31 | Middlesex | 40 22 47 N | 074 26 20 W |
| Jefferson Park (subdivision) | Populated Place | 37 | Middlesex | 40 31 56 N | 074 22 05 W |
| Jersey Turnpike Heliport | Airport | 23 | Middlesex | 40 28 36 N | 074 24 30 W |
| Jersey Turnpike New Brunswick Helistop | Airport | 20 | Middlesex | 40 28 38 N | 074 24 27 W |
| Jewish Community Center of Metuchen | Building | 41 | Middlesex | 40 32 52 N | 074 21 12 W |
| John Adams Elementary School | School | 35 | Middlesex | 40 27 53 N | 074 29 24 W |
| John Adams Middle School | School | 39 | Middlesex | 40 34 43 N | 074 22 11 W |
| John Calvin Magyar Reformed Church | Church | 28 | Middlesex | 40 31 06 N | 074 16 33 W |
| John E Riley Elementary School | School | 23 | Middlesex | 40 35 40 N | 074 24 15 W |
| John F Kennedy Elementary School | School | 34 | Middlesex | 40 20 58 N | 074 26 33 W |
| John F Kennedy Elementary School | School | 25 | Middlesex | 40 35 12 N | 074 23 56 W |
| John H Glenn Junior School | School | 8 | Middlesex | 40 23 32 N | 074 19 42 W |
| John J Delaney Homes (subdivision) | Populated Place | 20 | Middlesex | 40 32 02 N | 074 16 53 W |
| John Marshall Elementary School | School | 24 | Middlesex | 40 30 43 N | 074 25 04 W |
| John P Faber Elementary School | School | 17 | Middlesex | 40 34 57 N | 074 28 03 W |
| Johnson Learning Center | School | 27 | Middlesex | 40 30 23 N | 074 22 03 W |
| Johnson Park | Park | 1 | Middlesex | 40 30 31 N | 074 27 05 W |
| Johnsons Pond (historical) | Lake | 7 | Middlesex | 40 30 18 N | 074 26 14 W |
| Jonas Salk Middle School | School | 12 | Middlesex | 40 23 09 N | 074 22 01 W |
| Joseph Medwick Park | Park | 7 | Middlesex | 40 35 58 N | 074 14 17 W |
| Joyce Kilmer Elementary School | School | 17 | Middlesex | 40 27 06 N | 074 26 26 W |
| Keasbey | Populated Place | 11 | Middlesex | 40 31 00 N | 074 18 19 W |
| Keasbey Sewage Disposal Plant | Locale | 7 | Middlesex | 40 30 53 N | 074 18 09 W |
| Keasby Reach | Channel | 2 | Middlesex | 40 30 42 N | 074 17 56 W |
| Kendall Park | Populated Place | 56 | Middlesex | 40 25 15 N | 074 33 39 W |
| Kennedy Park | Park | 23 | Middlesex | 40 34 43 N | 074 19 27 W |
| Kennedy Park Elementary School | School | 24 | Middlesex | 40 34 44 N | 074 19 23 W |
| Keystone Park | Park | 3 | Middlesex | 40 24 52 N | 074 21 45 W |
| Kilmer Bowl | Basin | 35 | Middlesex | 40 31 38 N | 074 25 33 W |
| Kingdom Hall of Jehovahs Witnesses | Church | 9 | Middlesex | 40 30 39 N | 074 16 53 W |
| Knollwood Elementary School | School | 25 | Middlesex | 40 32 19 N | 074 29 14 W |
| Kossuth Park | Park | 24 | Middlesex | 40 29 44 N | 074 27 13 W |
| L'Hommedieu Hall | Building | 29 | Middlesex | 40 30 24 N | 074 21 53 W |
| Lady of Peace Church | Church | 31 | Middlesex | 40 26 31 N | 074 28 22 W |
| Lafayette Estates Elementary School | School | 29 | Middlesex | 40 32 48 N | 074 18 55 W |
| Lahiere | Populated Place | 32 | Middlesex | 40 31 08 N | 074 24 09 W |
| Lake Creighton | Reservoir | 11 | Middlesex | 40 34 04 N | 074 31 02 W |
| Lake Manalapan | Reservoir | 16 | Middlesex | 40 20 49 N | 074 26 06 W |
| Lake Marguerite | Reservoir | 12 | Middlesex | 40 22 40 N | 074 25 41 W |
| Lake Nelson | Reservoir | 18 | Middlesex | 40 32 27 N | 074 26 47 W |
| Lake Nelson Dam | Dam | 18 | Middlesex | 40 32 27 N | 074 26 47 W |
| Lake Nelson Memorial Cemetery | Cemetery | 27 | Middlesex | 40 32 11 N | 074 27 22 W |
| Lake Nelson Seventh Day School | School | 19 | Middlesex | 40 32 29 N | 074 27 20 W |
| Lakeridge Recreation Area | Park | 9 | Middlesex | 40 24 12 N | 074 15 26 W |
| Lappatatong Creek | Stream | | Middlesex | 40 26 11 N | 074 12 25 W |
| Laurel Park | Populated Place | 46 | Middlesex | 40 27 25 N | 074 18 49 W |
| Laurence Harbor | Populated Place | 10 | Middlesex | 40 27 24 N | 074 14 48 W |
| Laurence Harbor Beach | Beach | 0 | Middlesex | 40 27 31 N | 074 14 41 W |
| Laurence Harbor Public School (historical) | School | 15 | Middlesex | 40 27 02 N | 074 14 56 W |
| Lawrence Brook | Stream | | Middlesex | 40 29 05 N | 074 23 34 W |
| Lawrence Brook Elementary School | School | 26 | Middlesex | 40 27 45 N | 074 25 04 W |
| Lawrence Brook Manor | Populated Place | 22 | Middlesex | 40 28 20 N | 074 24 57 W |
| Leroy Gordon Cooper Elementary School | School | 6 | Middlesex | 40 26 47 N | 074 14 42 W |
| Liberty Truck Company Number 2 | Building | 11 | Middlesex | 40 31 18 N | 074 15 47 W |
| Lincoln Elementary School | School | 22 | Middlesex | 40 30 01 N | 074 27 13 W |
| Lincoln Elementary School | School | 31 | Middlesex | 40 31 18 N | 074 22 58 W |
| Lincoln Middle School | School | 16 | Middlesex | 40 35 31 N | 074 28 06 W |
| Lincoln Park | Populated Place | 32 | Middlesex | 40 31 12 N | 074 23 08 W |
| Lincoln School | School | 3 | Middlesex | 40 27 12 N | 074 23 03 W |
| Lindenau | Populated Place | 29 | Middlesex | 40 30 54 N | 074 24 40 W |
| Lindeneau Elementary School | School | 36 | Middlesex | 40 30 17 N | 074 24 28 W |
| Linwood Middle School | School | 34 | Middlesex | 40 28 08 N | 074 27 35 W |
| Little Bear Brook | Stream | | Middlesex | 40 19 43 N | 074 37 29 W |
| Little Rocky Hill | Populated Place | 73 | Middlesex | 40 23 51 N | 074 35 20 W |
| Livingston Elementary School | School | 26 | Middlesex | 40 29 07 N | 074 27 02 W |
| Livingston Park Elementary School | School | 36 | Middlesex | 40 27 54 N | 074 28 23 W |
| Long Reach | Channel | 0 | Middlesex | 40 28 35 N | 074 22 02 W |
| Lord Stirling Elementary School | School | 12 | Middlesex | 40 29 23 N | 074 26 24 W |
| Luke Park | Park | 37 | Middlesex | 40 26 39 N | 074 31 18 W |
| Lynn Crest Elementary School | School | 30 | Middlesex | 40 35 20 N | 074 19 51 W |
| Lynn Woodoaks | Populated Place | 32 | Middlesex | 40 35 20 N | 074 19 60 W |
| M Scott Carpenter Elementary School | School | 6 | Middlesex | 40 23 55 N | 074 20 12 W |
| MacArthur Manor | Populated Place | 4 | Middlesex | 40 27 30 N | 074 22 09 W |
| MacWilliams Stadium | Park | 3 | Middlesex | 40 30 06 N | 074 16 32 W |
| Madison Park | Populated Place | 38 | Middlesex | 40 27 05 N | 074 18 29 W |
| Madison Park Elementary School | School | 38 | Middlesex | 40 27 07 N | 074 18 31 W |
| Main Hall | Building | 30 | Middlesex | 40 30 21 N | 074 21 54 W |
| Majors Pond | Reservoir | 1 | Middlesex | 40 27 41 N | 074 21 54 W |
| Manalapan Brook | Stream | | Middlesex | 40 23 33 N | 074 22 58 W |
| Manalapan Lake Dam | Dam | 16 | Middlesex | 40 20 49 N | 074 26 06 W |
| Maple Hill Dairy (historical) | Locale | 37 | Middlesex | 40 33 14 N | 074 18 05 W |
| Maple Meade | Populated Place | 33 | Middlesex | 40 26 37 N | 074 28 32 W |
| Maple Meade School | School | 35 | Middlesex | 40 26 21 N | 074 28 36 W |
| Market Building | Building | 11 | Middlesex | 40 30 27 N | 074 16 14 W |