Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Peddie Lake | Reservoir | 31 | Mercer | 40 16 10 N | 074 31 24 W |
| Peddie Lake Dam | Dam | 31 | Mercer | 40 16 10 N | 074 31 24 W |
| Peddie Prep School | School | 32 | Mercer | 40 15 57 N | 074 31 24 W |
| Peddie School | School | 40 | Mercer | 40 15 49 N | 074 31 22 W |
| Peddie School Heliport | Airport | 31 | Mercer | 40 15 42 N | 074 31 09 W |
| Pennington | Populated Place | 64 | Mercer | 40 19 42 N | 074 47 27 W |
| Pennington Fire Station 51 | Building | 40 | Mercer | 40 19 48 N | 074 47 47 W |
| Pennington Mountain | Summit | 117 | Mercer | 40 21 25 N | 074 48 22 W |
| Pennington Presbyterian Church | Church | 40 | Mercer | 40 19 39 N | 074 47 25 W |
| Pennington Shopping Center | Locale | 40 | Mercer | 40 19 35 N | 074 47 51 W |
| Penns Neck | Populated Place | 31 | Mercer | 40 19 56 N | 074 38 13 W |
| Penns Neck School (historical) | School | 32 | Mercer | 40 19 37 N | 074 38 38 W |
| Perriwig Channel | Channel | -3 | Mercer | 40 10 45 N | 074 44 23 W |
| Perry L Drew Elementary School | School | 40 | Mercer | 40 16 27 N | 074 29 21 W |
| Peters Brook | Stream | | Mercer | 40 23 33 N | 074 50 03 W |
| Pleasant Run | Stream | | Mercer | 40 08 26 N | 074 36 47 W |
| Pond Run | Stream | | Mercer | 40 13 53 N | 074 44 21 W |
| Port Mercer | Populated Place | 13 | Mercer | 40 18 15 N | 074 41 06 W |
| Post Corner | Populated Place | 28 | Mercer | 40 16 58 N | 074 38 14 W |
| Prince of Peace Lutheran Church | Church | 32 | Mercer | 40 18 10 N | 074 36 29 W |
| Princessville | Populated Place | 25 | Mercer | 40 17 33 N | 074 42 28 W |
| Princeton | Populated Place | 61 | Mercer | 40 20 55 N | 074 39 33 W |
| Princeton Battle Monument | Park | 61 | Mercer | 40 20 54 N | 074 39 50 W |
| Princeton Battlefield State Park | Park | 34 | Mercer | 40 19 53 N | 074 40 31 W |
| Princeton Boat House | Building | 40 | Mercer | 40 20 22 N | 074 39 01 W |
| Princeton Cemetery | Cemetery | 55 | Mercer | 40 21 14 N | 074 39 36 W |
| Princeton Child Development Institute | School | 63 | Mercer | 40 19 53 N | 074 43 44 W |
| Princeton Colonial Park | Populated Place | 29 | Mercer | 40 18 07 N | 074 37 09 W |
| Princeton Country Club | Locale | 20 | Mercer | 40 18 44 N | 074 40 16 W |
| Princeton Crossroads Corporate Center | Locale | 40 | Mercer | 40 16 48 N | 074 47 49 W |
| Princeton Day School | School | 57 | Mercer | 40 21 45 N | 074 41 24 W |
| Princeton Estates | Populated Place | 30 | Mercer | 40 17 53 N | 074 36 45 W |
| Princeton Graduate College | School | 55 | Mercer | 40 20 27 N | 074 39 57 W |
| Princeton High School | School | 40 | Mercer | 40 21 28 N | 074 39 20 W |
| Princeton House Medical Center | Hospital | 49 | Mercer | 40 23 18 N | 074 39 19 W |
| Princeton Institute for Advanced Studies | School | 31 | Mercer | 40 19 50 N | 074 40 04 W |
| Princeton Ivy East | Populated Place | 32 | Mercer | 40 18 00 N | 074 36 23 W |
| Princeton Junction | Populated Place | 23 | Mercer | 40 19 02 N | 074 37 12 W |
| Princeton Medical Center | Hospital | 40 | Mercer | 40 21 26 N | 074 39 42 W |
| Princeton Metro Park | Park | 40 | Mercer | 40 19 02 N | 074 37 49 W |
| Princeton Park Corporate Center | Locale | 40 | Mercer | 40 17 24 N | 074 42 35 W |
| Princeton Park Office Center | Locale | 40 | Mercer | 40 17 01 N | 074 43 03 W |
| Princeton Public School | School | 58 | Mercer | 40 21 02 N | 074 39 17 W |
| Princeton Shopping Center | Locale | 43 | Mercer | 40 21 50 N | 074 39 01 W |
| Princeton South Corporate Center | Locale | 40 | Mercer | 40 17 03 N | 074 42 31 W |
| Princeton Theological Seminary | School | 60 | Mercer | 40 20 43 N | 074 40 07 W |
| Princeton Township School | School | 40 | Mercer | 40 21 38 N | 074 39 48 W |
| Princeton University | School | 42 | Mercer | 40 20 34 N | 074 39 25 W |
| Proctor Dining Hall | Building | 55 | Mercer | 40 20 26 N | 074 39 55 W |
| Prospect Heights | Populated Place | 25 | Mercer | 40 14 53 N | 074 45 51 W |
| Prospect House | Building | 60 | Mercer | 40 20 49 N | 074 39 24 W |
| Prospect Park | Populated Place | 29 | Mercer | 40 14 25 N | 074 45 59 W |
| PSE and G Trenton Distribution Helistop | Airport | 26 | Mercer | 40 17 15 N | 074 40 30 W |
| Pyne Hall | Building | 52 | Mercer | 40 20 43 N | 074 39 35 W |
| Quadrangle Club | Building | 56 | Mercer | 40 20 53 N | 074 39 10 W |
| Quaker Bridge | Bridge | 18 | Mercer | 40 16 09 N | 074 40 20 W |
| Quaker Bridge Mall Shopping Center | Locale | 24 | Mercer | 40 17 25 N | 074 40 53 W |
| Quaker Gardens | Populated Place | 20 | Mercer | 40 15 05 N | 074 41 01 W |
| Quakerbridge Commerce Center | Locale | 40 | Mercer | 40 15 35 N | 074 40 33 W |
| RCA Princeton Heliport | Airport | 30 | Mercer | 40 20 00 N | 074 37 57 W |
| Reunion Hall | Building | 61 | Mercer | 40 20 54 N | 074 39 35 W |
| Rider College | School | 17 | Mercer | 40 13 16 N | 074 45 25 W |
| Rider University | School | 40 | Mercer | 40 16 45 N | 074 44 22 W |
| Riverside Elementary School | School | 40 | Mercer | 40 21 17 N | 074 38 12 W |
| Riverview Cemetery | Cemetery | 7 | Mercer | 40 11 42 N | 074 45 18 W |
| Robbinsville | Populated Place | 39 | Mercer | 40 12 52 N | 074 37 10 W |
| Robertson Hall | Building | 62 | Mercer | 40 20 54 N | 074 39 17 W |
| Rocky Brook | Stream | | Mercer | 40 17 18 N | 074 32 23 W |
| Rocky Hill | Summit | 93 | Mercer | 40 22 44 N | 074 39 34 W |
| Rocky Hill Cemetery | Cemetery | 44 | Mercer | 40 24 23 N | 074 38 29 W |
| Roscoe L West Library | Building | 40 | Mercer | 40 16 16 N | 074 46 38 W |
| Rosedale | Populated Place | 48 | Mercer | 40 20 17 N | 074 43 19 W |
| Rosedale Chapel (historical) | Church | 56 | Mercer | 40 20 08 N | 074 43 14 W |
| Rosedale Lake | Reservoir | 40 | Mercer | 40 19 58 N | 074 45 16 W |
| Rosedale Park | Park | 39 | Mercer | 40 19 45 N | 074 45 19 W |
| Rosemont | Populated Place | 32 | Mercer | 40 14 21 N | 074 41 39 W |
| Rotary Island | Island | 10 | Mercer | 40 14 14 N | 074 48 56 W |
| Rowan Lake | Lake | 0 | Mercer | 40 11 11 N | 074 43 43 W |
| Royal Plaza Shopping Center | Locale | 40 | Mercer | 40 16 05 N | 074 32 37 W |
| Sacred Heart School | School | 11 | Mercer | 40 12 52 N | 074 45 42 W |
| Saint Alphonsus Church | Church | 40 | Mercer | 40 23 18 N | 074 45 27 W |
| Saint Ann School | School | 30 | Mercer | 40 15 58 N | 074 44 39 W |
| Saint Anthonys Convent | School | 17 | Mercer | 40 13 09 N | 074 43 53 W |
| Saint Francis Medical Center Helistop | Airport | 17 | Mercer | 40 13 06 N | 074 44 18 W |
| Saint George Church | Church | 40 | Mercer | 40 18 03 N | 074 52 08 W |
| Saint Hedwigs Cemetery | Cemetery | 36 | Mercer | 40 16 19 N | 074 45 27 W |
| Saint Hedwigs School | School | 30 | Mercer | 40 14 17 N | 074 45 01 W |
| Saint James African Methodist Episcopal Church | Church | 40 | Mercer | 40 16 01 N | 074 31 54 W |
| Saint James School | School | 27 | Mercer | 40 14 05 N | 074 45 28 W |
| Saint Joachims School | School | 15 | Mercer | 40 12 47 N | 074 45 11 W |
| Saint Lawrence Rehabilitation Center | Hospital | 40 | Mercer | 40 17 17 N | 074 44 08 W |
| Saint Paul's Lutheran Church | Church | 30 | Mercer | 40 16 15 N | 074 32 47 W |
| Saint Pauls School | School | 55 | Mercer | 40 21 06 N | 074 39 12 W |
| Saint Vincent DePaul Church | Church | 14 | Mercer | 40 10 34 N | 074 39 37 W |
| Saline Hall | Building | 61 | Mercer | 40 20 53 N | 074 39 42 W |
| Science Complex | Building | 40 | Mercer | 40 16 16 N | 074 46 47 W |
| Scudder Plaza | Park | 62 | Mercer | 40 20 55 N | 074 39 17 W |
| Scudders Falls | Populated Place | 28 | Mercer | 40 15 33 N | 074 50 13 W |
| Scully Dormitories | Building | 42 | Mercer | 40 20 40 N | 074 39 19 W |
| Seeley G Mudd Manuscript Library | Building | 54 | Mercer | 40 20 59 N | 074 39 07 W |
| Shabakunk Creek | Stream | | Mercer | 40 15 02 N | 074 43 13 W |
| Sherbrook Estates | Populated Place | 25 | Mercer | 40 18 52 N | 074 36 53 W |
| Shipetaukin Creek | Stream | | Mercer | 40 16 32 N | 074 42 10 W |
| Slackwood Elementary School | School | 40 | Mercer | 40 15 05 N | 074 44 24 W |
| Slackwoods | Populated Place | 25 | Mercer | 40 15 11 N | 074 44 05 W |
| Somerset | Populated Place | 37 | Mercer | 40 16 34 N | 074 50 57 W |
| Speer Library | Building | 58 | Mercer | 40 20 44 N | 074 39 58 W |
| Spelman Hall | Building | 47 | Mercer | 40 20 39 N | 074 39 33 W |
| Spring Lake | Reservoir | 2 | Mercer | 40 11 36 N | 074 43 58 W |
| Springdale Golf Club | Locale | 40 | Mercer | 40 20 16 N | 074 39 43 W |