Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Saint Hedwig Church | Church | 79 | Hillsborough | 42 59 48 N | 071 27 21 W |
| Saint Jean de Baptiste School | School | 76 | Hillsborough | 42 59 44 N | 071 29 03 W |
| Saint John the Baptist Roman Catholic Church | Church | 78 | Hillsborough | 42 59 47 N | 071 28 59 W |
| Saint John the Evangelist Roman Catholic Church | Church | 48 | Hillsborough | 42 45 52 N | 071 26 16 W |
| Saint Johns School | School | 48 | Hillsborough | 42 45 52 N | 071 26 16 W |
| Saint Joseph Hospital and Trauma Center | Hospital | 57 | Hillsborough | 42 44 57 N | 071 28 48 W |
| Saint Joseph Minor Seminary | School | 313 | Hillsborough | 42 52 48 N | 071 56 24 W |
| Saint Joseph Regional Junior High School | School | 72 | Hillsborough | 42 59 41 N | 071 27 39 W |
| Saint Josephs Cathedral | Church | 75 | Hillsborough | 42 59 48 N | 071 27 37 W |
| Saint Josephs Parish Roman Catholic Church | Church | 55 | Hillsborough | 42 44 53 N | 071 28 44 W |
| Saint Josephs School | School | 57 | Hillsborough | 42 44 54 N | 071 28 49 W |
| Saint Judes Parish Community Church | Church | 49 | Hillsborough | 42 46 00 N | 071 20 57 W |
| Saint Lawrence Church | Church | 95 | Hillsborough | 43 01 02 N | 071 35 51 W |
| Saint Louis de Gonzague Roman Catholic Church | Church | 50 | Hillsborough | 42 45 26 N | 071 28 11 W |
| Saint Louis De Gonzagues Cemetery | Cemetery | 55 | Hillsborough | 42 44 15 N | 071 31 09 W |
| Saint Lukes Anglican Church | Church | 89 | Hillsborough | 42 52 04 N | 071 36 54 W |
| Saint Marie Roman Catholic Church | Church | 74 | Hillsborough | 42 59 33 N | 071 28 35 W |
| Saint Mary Ukranian Church | Church | 74 | Hillsborough | 42 59 37 N | 071 27 25 W |
| Saint Marys Catholic Church | Church | 189 | Hillsborough | 43 06 48 N | 071 54 55 W |
| Saint Marys Cemetery | Cemetery | 214 | Hillsborough | 43 07 27 N | 071 54 26 W |
| Saint Matthews Episcopal Church | Church | 94 | Hillsborough | 43 01 13 N | 071 35 57 W |
| Saint Nicholas Orthodox Church | Church | 108 | Hillsborough | 42 59 42 N | 071 24 32 W |
| Saint Patrick Church | Church | 45 | Hillsborough | 42 43 59 N | 071 19 14 W |
| Saint Patrick Roman Catholic Church | Church | 70 | Hillsborough | 42 59 45 N | 071 28 35 W |
| Saint Patricks Cemetery | Cemetery | 71 | Hillsborough | 42 50 13 N | 071 37 21 W |
| Saint Patricks Cemetery | Cemetery | 54 | Hillsborough | 42 46 33 N | 071 26 27 W |
| Saint Patricks Center | Building | 46 | Hillsborough | 42 45 33 N | 071 27 48 W |
| Saint Patricks Convent School | School | 45 | Hillsborough | 42 43 59 N | 071 19 16 W |
| Saint Patricks Orphanage | Building | 75 | Hillsborough | 42 59 35 N | 071 27 10 W |
| Saint Patricks Roman Catholic Church | Church | 46 | Hillsborough | 42 45 34 N | 071 27 48 W |
| Saint Patricks Roman Catholic Church | Church | 74 | Hillsborough | 42 50 17 N | 071 38 47 W |
| Saint Patricks School | School | 71 | Hillsborough | 42 59 44 N | 071 28 36 W |
| Saint Pauls United Methodist Church | Church | 108 | Hillsborough | 43 00 22 N | 071 26 43 W |
| Saint Peter and Saint Paul Church | Church | 69 | Hillsborough | 42 59 00 N | 071 27 24 W |
| Saint Peters Cemetery | Cemetery | 260 | Hillsborough | 42 53 29 N | 071 57 05 W |
| Saint Peters Orphanage | Building | 75 | Hillsborough | 42 59 41 N | 071 29 00 W |
| Saint Peters School | School | 75 | Hillsborough | 42 59 41 N | 071 28 58 W |
| Saint Phillips Greek Orthodox Church | Church | 57 | Hillsborough | 42 44 53 N | 071 29 38 W |
| Saint Pius X Roman Catholic Church | Church | 107 | Hillsborough | 42 58 58 N | 071 25 05 W |
| Saint Raphael Roman Catholic Church | Church | 46 | Hillsborough | 42 58 55 N | 071 28 23 W |
| Saint Raphaels School | School | 45 | Hillsborough | 42 58 56 N | 071 28 22 W |
| Saint Stanislaus Cemetery | Cemetery | 60 | Hillsborough | 42 46 29 N | 071 29 52 W |
| Saint Stanislaus Parish Church | Church | 44 | Hillsborough | 42 45 49 N | 071 28 14 W |
| Saint Theresa Roman Catholic Church | Church | 75 | Hillsborough | 42 57 55 N | 071 27 36 W |
| Saint Therese School | School | 71 | Hillsborough | 42 57 57 N | 071 27 31 W |
| Salmon Brook | Stream | | Hillsborough | 43 04 03 N | 072 01 45 W |
| Salmon Brook | Stream | | Hillsborough | 42 44 54 N | 071 26 38 W |
| Salmon Brook Main Street Pond | Reservoir | 50 | Hillsborough | 42 45 06 N | 071 27 46 W |
| Salvation Army | Church | 68 | Hillsborough | 42 59 09 N | 071 27 32 W |
| Salvation Army | Church | 64 | Hillsborough | 42 44 38 N | 071 27 20 W |
| Sams Heliport | Airport | 191 | Hillsborough | 42 58 02 N | 071 34 20 W |
| Samuel Blodget Park | Park | 62 | Hillsborough | 43 00 35 N | 071 28 45 W |
| Sand Brook | Stream | | Hillsborough | 43 08 30 N | 071 52 36 W |
| Sand Brook Marsh | Reservoir | 276 | Hillsborough | 43 10 48 N | 071 54 10 W |
| Sand Brook Marsh Dam | Dam | 277 | Hillsborough | 43 10 48 N | 071 54 10 W |
| Sandhill Pond | Lake | 177 | Hillsborough | 42 55 58 N | 071 44 17 W |
| Sandy Pond | Lake | 49 | Hillsborough | 42 44 59 N | 071 28 17 W |
| Sargent (historical) | Populated Place | 98 | Hillsborough | 43 03 23 N | 071 39 02 W |
| Scab Mill Brook | Stream | | Hillsborough | 42 45 37 N | 071 40 49 W |
| Scout Trail | Trail | 256 | Hillsborough | 42 57 08 N | 071 53 23 W |
| Seavey Hill | Summit | 142 | Hillsborough | 42 42 41 N | 071 22 09 W |
| Sebbins Brook | Stream | | Hillsborough | 42 54 45 N | 071 27 14 W |
| Sebbins Pond | Lake | 59 | Hillsborough | 42 55 41 N | 071 28 42 W |
| Second Brook | Stream | | Hillsborough | 42 45 17 N | 071 26 18 W |
| Second Congregational Church | Church | 113 | Hillsborough | 42 50 46 N | 071 44 20 W |
| Second Street Shoppes Shopping Center | Locale | 42 | Hillsborough | 42 58 29 N | 071 28 33 W |
| Senter Cemetery | Cemetery | 68 | Hillsborough | 42 48 51 N | 071 24 28 W |
| Shadrach Pond | Lake | 444 | Hillsborough | 42 58 44 N | 072 03 00 W |
| Shaky Pond | Lake | 242 | Hillsborough | 42 57 22 N | 071 38 33 W |
| Shanklin Heliport | Airport | 247 | Hillsborough | 42 49 32 N | 071 44 28 W |
| Sharon | Populated Place | 354 | Hillsborough | 42 48 47 N | 071 54 56 W |
| Sharon Arts Center | Building | 353 | Hillsborough | 42 48 46 N | 071 54 57 W |
| Shattuck Pond | Lake | 284 | Hillsborough | 43 01 41 N | 071 49 39 W |
| Shedd Brook | Stream | | Hillsborough | 43 07 15 N | 071 56 03 W |
| Sheepfold Assembly of God Church | Church | 41 | Hillsborough | 42 45 42 N | 071 27 28 W |
| Shieling State Forest | Forest | 254 | Hillsborough | 42 53 37 N | 071 55 58 W |
| Shipley Hill | Summit | 120 | Hillsborough | 42 45 27 N | 071 31 32 W |
| Shirley Hill | Summit | 249 | Hillsborough | 42 59 18 N | 071 34 12 W |
| Shirley Hill Cemetery | Cemetery | 208 | Hillsborough | 42 59 00 N | 071 33 55 W |
| Shirley Park | Park | 90 | Hillsborough | 43 00 58 N | 071 34 58 W |
| Silver Lake | Lake | 83 | Hillsborough | 42 45 25 N | 071 35 52 W |
| Silver Lake State Park | Park | 82 | Hillsborough | 42 45 45 N | 071 35 36 W |
| Simoneau Plaza Shopping Center | Locale | 40 | Hillsborough | 42 45 12 N | 071 27 33 W |
| Simpson Park | Park | 72 | Hillsborough | 42 59 37 N | 071 28 32 W |
| Sisters of the Holy Cross Novitiate | Church | 100 | Hillsborough | 42 58 18 N | 071 25 01 W |
| Sisters of the Precious Blood Monastery | Church | 108 | Hillsborough | 42 59 57 N | 071 25 48 W |
| Skatutakee Mountain | Summit | 572 | Hillsborough | 42 58 09 N | 072 02 16 W |
| Skypark Campground | Locale | 111 | Hillsborough | 43 03 35 N | 071 39 18 W |
| Slab City | Populated Place | 231 | Hillsborough | 43 05 55 N | 071 45 40 W |
| Smith Brook | Stream | | Hillsborough | 43 06 56 N | 071 50 03 W |
| Smithville | Populated Place | 324 | Hillsborough | 42 44 15 N | 071 52 16 W |
| Smithville Cemetery | Cemetery | 327 | Hillsborough | 42 44 01 N | 071 52 39 W |
| Smithville Reservoir | Reservoir | 327 | Hillsborough | 42 44 06 N | 071 52 52 W |
| Smyth Road School | School | 113 | Hillsborough | 43 00 20 N | 071 26 38 W |
| Sodom Hill | Summit | 360 | Hillsborough | 43 06 16 N | 071 51 17 W |
| Solon Mansfield Memorial Library | Building | 321 | Hillsborough | 42 49 15 N | 071 51 06 W |
| Somerset Plaza Shopping Center | Locale | 60 | Hillsborough | 42 46 48 N | 071 29 52 W |
| Souhegan Cooperative High School | School | 71 | Hillsborough | 42 49 27 N | 071 34 35 W |
| Souhegan River | Stream | | Hillsborough | 42 51 41 N | 071 29 14 W |
| Souhegan River Reservoir | Reservoir | 30 | Hillsborough | 42 51 36 N | 071 29 34 W |
| Souhegan River Reservoir | Reservoir | 107 | Hillsborough | 42 50 18 N | 071 43 40 W |
| Souhegan River Reservoir | Reservoir | 70 | Hillsborough | 42 50 12 N | 071 38 46 W |
| Souhegan River Reservoir Number 13 | Reservoir | 300 | Hillsborough | 42 45 54 N | 071 50 40 W |
| Souhegan River Watershed Dam Number 10A | Dam | 262 | Hillsborough | 42 51 00 N | 071 48 10 W |
| Souhegan River Watershed Dam Number 12A | Dam | 267 | Hillsborough | 42 47 36 N | 071 49 40 W |
| Souhegan River Watershed Dam Number 13 | Dam | 300 | Hillsborough | 42 45 54 N | 071 50 40 W |
| Souhegan River Watershed Dam Number 14 | Dam | 324 | Hillsborough | 42 45 54 N | 071 51 34 W |
| Souhegan River Watershed Dam Number 15 | Dam | 270 | Hillsborough | 42 47 48 N | 071 48 16 W |
| Souhegan River Watershed Dam Number 19 | Dam | 297 | Hillsborough | 42 43 24 N | 071 50 52 W |
| Souhegan River Watershed Dam Number 25B | Dam | 233 | Hillsborough | 42 49 18 N | 071 49 10 W |