Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Springdale Hall | Building | 56 | Mercer | 40 20 39 N | 074 39 55 W |
| Stacy Park | Park | 6 | Mercer | 40 13 08 N | 074 46 17 W |
| Stafford Little Hall | Building | 53 | Mercer | 40 20 47 N | 074 39 34 W |
| Stanhope Hall | Building | 62 | Mercer | 40 20 56 N | 074 39 36 W |
| State Capitol | Building | 8 | Mercer | 40 13 05 N | 074 46 06 W |
| State Cemetery | Cemetery | 42 | Mercer | 40 16 08 N | 074 47 44 W |
| Stokes Memorial School | School | 30 | Mercer | 40 14 28 N | 074 46 57 W |
| Stony Brook | Stream | | Mercer | 40 20 03 N | 074 39 09 W |
| Stony Brook Branch | Stream | | Mercer | 40 21 06 N | 074 47 02 W |
| Stony Brook Church | Church | 28 | Mercer | 40 19 38 N | 074 40 37 W |
| Stony Brook Fourteen Basin | Reservoir | 36 | Mercer | 40 20 39 N | 074 44 47 W |
| Stony Brook School | School | 29 | Mercer | 40 20 04 N | 074 40 52 W |
| Stony Brook Watershed Dam Fourteen | Dam | 36 | Mercer | 40 20 39 N | 074 44 47 W |
| Stonybrook Golf Club | Locale | 40 | Mercer | 40 22 29 N | 074 47 26 W |
| Stoutsburg | Populated Place | 50 | Mercer | 40 23 55 N | 074 44 08 W |
| Strawberry Hill | Summit | 144 | Mercer | 40 19 22 N | 074 53 44 W |
| Stuart County Day School of the Sacred Heart | School | 68 | Mercer | 40 22 07 N | 074 41 04 W |
| Stuart Hall | Building | 61 | Mercer | 40 20 43 N | 074 39 47 W |
| Sturgeon Pond | Reservoir | 4 | Mercer | 40 11 15 N | 074 44 53 W |
| Sturwood Hamlet | Populated Place | 31 | Mercer | 40 16 24 N | 074 44 32 W |
| Suburban Square Shopping Center | Locale | 40 | Mercer | 40 15 55 N | 074 48 09 W |
| Sylvia Lake | Reservoir | 28 | Mercer | 40 16 15 N | 074 46 24 W |
| Sylvia Lake Dam | Dam | 28 | Mercer | 40 16 15 N | 074 46 24 W |
| Technical School | School | 15 | Mercer | 40 13 15 N | 074 45 35 W |
| Teen House | Building | 8 | Mercer | 40 12 46 N | 074 45 56 W |
| Temple Park | Park | 40 | Mercer | 40 16 45 N | 074 46 22 W |
| Templeton Hall | Building | 54 | Mercer | 40 20 38 N | 074 39 50 W |
| Tenacre Foundation Hospital | Hospital | 67 | Mercer | 40 22 05 N | 074 41 34 W |
| Tenacre Foundation Nursing Home | Hospital | 71 | Mercer | 40 22 05 N | 074 41 29 W |
| Terrace Club | Building | 56 | Mercer | 40 20 50 N | 074 39 14 W |
| The American Boys Choir School | School | 50 | Mercer | 40 20 31 N | 074 41 51 W |
| The Church of Princeton | Church | 40 | Mercer | 40 21 45 N | 074 39 57 W |
| The Orchards | Populated Place | 23 | Mercer | 40 14 20 N | 074 41 50 W |
| The Square at West Windsor Shopping Center | Locale | 40 | Mercer | 40 18 36 N | 074 39 41 W |
| Third World Center | Building | 55 | Mercer | 40 20 57 N | 074 39 04 W |
| Thomas Molecular Laboratory | Building | 40 | Mercer | 40 20 41 N | 074 39 15 W |
| Thomas R Grover Middle School | School | 40 | Mercer | 40 16 22 N | 074 35 42 W |
| Thompson Court | Building | 55 | Mercer | 40 20 27 N | 074 39 55 W |
| Tiger Inn | Building | 57 | Mercer | 40 20 56 N | 074 39 08 W |
| Timber Run | Stream | | Mercer | 40 15 30 N | 074 29 26 W |
| Timberlane Middle School | School | 40 | Mercer | 40 19 41 N | 074 48 26 W |
| Titusville | Populated Place | 25 | Mercer | 40 18 34 N | 074 52 50 W |
| Toll Gate Grammar School | School | 40 | Mercer | 40 19 16 N | 074 47 21 W |
| Tower Club | Building | 60 | Mercer | 40 20 52 N | 074 39 14 W |
| Town Center Plaza Shopping Center | Locale | 40 | Mercer | 40 16 40 N | 074 31 54 W |
| Town Center Shopping Center | Locale | 40 | Mercer | 40 16 36 N | 074 32 13 W |
| Township of East Windsor | Civil | 37 | Mercer | 40 15 30 N | 074 31 29 W |
| Township of Ewing | Civil | 38 | Mercer | 40 15 30 N | 074 47 59 W |
| Township of Hamilton | Civil | 31 | Mercer | 40 12 30 N | 074 40 29 W |
| Township of Hopewell | Civil | 66 | Mercer | 40 20 00 N | 074 48 59 W |
| Township of Lawrence | Civil | 31 | Mercer | 40 17 30 N | 074 43 59 W |
| Township of Princeton | Civil | 61 | Mercer | 40 22 00 N | 074 40 29 W |
| Township of Washington | Civil | 33 | Mercer | 40 13 00 N | 074 35 29 W |
| Township of West Windsor | Civil | 24 | Mercer | 40 17 30 N | 074 38 29 W |
| Township School Number 4 | School | 15 | Mercer | 40 16 20 N | 074 42 36 W |
| Travers Tower | Building | 40 | Mercer | 40 16 02 N | 074 46 30 W |
| Trent House | Building | 8 | Mercer | 40 12 46 N | 074 45 57 W |
| Trenton | Populated Place | 17 | Mercer | 40 13 01 N | 074 44 35 W |
| Trenton Channel | Channel | 0 | Mercer | 40 12 00 N | 074 45 39 W |
| Trenton Country Club | Locale | 24 | Mercer | 40 14 38 N | 074 48 48 W |
| Trenton Day School | School | 23 | Mercer | 40 14 46 N | 074 45 32 W |
| Trenton Gardens | Populated Place | 29 | Mercer | 40 11 50 N | 074 41 58 W |
| Trenton Heliport | Airport | 7 | Mercer | 40 12 50 N | 074 46 02 W |
| Trenton Marine Terminal | Locale | 6 | Mercer | 40 11 15 N | 074 45 04 W |
| Trenton-Robbinsville Airport | Airport | 32 | Mercer | 40 12 50 N | 074 36 05 W |
| Trinity Church | Church | 61 | Mercer | 40 20 50 N | 074 39 53 W |
| Twin Pine Airport | Airport | 67 | Mercer | 40 18 30 N | 074 45 27 W |
| Twin Rivers | Populated Place | 36 | Mercer | 40 15 50 N | 074 29 29 W |
| University Chapel | Church | 62 | Mercer | 40 20 56 N | 074 39 24 W |
| University Heights-H D Morrison Elementary School | School | 31 | Mercer | 40 15 20 N | 074 40 22 W |
| University Square Shopping Center | Locale | 40 | Mercer | 40 19 37 N | 074 38 27 W |
| Upper Bear Swamp | Swamp | 17 | Mercer | 40 18 20 N | 074 39 12 W |
| Upper Pyne (historical) | Building | 61 | Mercer | 40 20 58 N | 074 39 37 W |
| Van Horn Park | Park | 40 | Mercer | 40 15 07 N | 074 41 29 W |
| Vannest State Wildlife Management Area | Park | 18 | Mercer | 40 16 00 N | 074 39 59 W |
| Villa Victoria Academy | School | 13 | Mercer | 40 15 17 N | 074 50 29 W |
| Village Elementary School | School | 40 | Mercer | 40 16 25 N | 074 36 24 W |
| Von Neuman Engineering Research Laboratory | Building | 50 | Mercer | 40 21 01 N | 074 38 59 W |
| Wallace Social Science Center | Building | 60 | Mercer | 40 20 57 N | 074 39 13 W |
| Walter C Black Elementary School | School | 37 | Mercer | 40 16 14 N | 074 32 01 W |
| Warner Village | Populated Place | 15 | Mercer | 40 14 01 N | 074 43 33 W |
| Washington Crossing | Populated Place | 18 | Mercer | 40 17 48 N | 074 52 01 W |
| Washington Crossing State Park | Park | 51 | Mercer | 40 18 40 N | 074 51 49 W |
| WBUD-AM (Trenton) | Tower | 25 | Mercer | 40 15 56 N | 074 45 26 W |
| Weber Park | Populated Place | 31 | Mercer | 40 14 42 N | 074 46 24 W |
| Weidel Airport | Airport | 89 | Mercer | 40 20 25 N | 074 51 14 W |
| West Branch Shabakunk Creek | Stream | | Mercer | 40 15 04 N | 074 44 56 W |
| West College | Building | 60 | Mercer | 40 20 53 N | 074 39 35 W |
| West Trenton | Populated Place | 49 | Mercer | 40 15 50 N | 074 49 07 W |
| West Trenton Presbyterian Church | Church | 40 | Mercer | 40 15 42 N | 074 48 59 W |
| West Trenton Station | Locale | 38 | Mercer | 40 15 31 N | 074 48 49 W |
| West Windsor Commerce Center | Locale | 40 | Mercer | 40 17 45 N | 074 39 42 W |
| West Windsor Community Park | Park | 40 | Mercer | 40 18 09 N | 074 36 09 W |
| West Windsor-Plainsboro High School South Campus | School | 29 | Mercer | 40 18 21 N | 074 37 09 W |
| Westerly Road Fundamentalist Church | Church | 39 | Mercer | 40 21 15 N | 074 40 34 W |
| Westminister Choir School | School | 49 | Mercer | 40 21 23 N | 074 39 12 W |
| Wetzel Field | Park | 15 | Mercer | 40 12 38 N | 074 44 16 W |
| Whig Hall | Building | 61 | Mercer | 40 20 52 N | 074 39 30 W |
| White Horse | Populated Place | 27 | Mercer | 40 11 26 N | 074 42 09 W |
| Whitehead Pond | Reservoir | 10 | Mercer | 40 14 52 N | 074 43 37 W |
| Whitehead Pond Dam | Dam | 10 | Mercer | 40 14 52 N | 074 43 37 W |
| WHWH-AM (Princeton) | Tower | 67 | Mercer | 40 22 00 N | 074 44 37 W |
| Wilburtha | Populated Place | 17 | Mercer | 40 15 07 N | 074 49 57 W |
| William L Antheil Elementary School | School | 40 | Mercer | 40 16 22 N | 074 46 02 W |
| Wiltshire Shopping Center | Locale | 40 | Mercer | 40 17 58 N | 074 38 34 W |
| Windsor | Populated Place | 30 | Mercer | 40 14 32 N | 074 34 53 W |
| Windsor Chapel | Church | 32 | Mercer | 40 16 50 N | 074 36 41 W |
| Windsor Green Shopping Center | Locale | 40 | Mercer | 40 18 32 N | 074 40 06 W |
| Windsor Heights Shopping Center | Locale | 40 | Mercer | 40 16 22 N | 074 32 27 W |
| Witherspoon Hall | Building | 58 | Mercer | 40 20 51 N | 074 39 37 W |