Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Saltzman Creek | Stream | | Multnomah | 45 34 07 N | 122 44 27 W |
| Sam Barlow High School | School | 165 | Multnomah | 45 29 10 N | 122 21 14 W |
| Sam Jackson Park | Park | 129 | Multnomah | 45 29 56 N | 122 41 04 W |
| San Rafael Post Office (historical) | Post Office | 52 | Multnomah | 45 32 12 N | 122 37 11 W |
| Sand Island | Island | 27 | Multnomah | 45 33 22 N | 122 12 00 W |
| Sand Island | Island | 7 | Multnomah | 45 35 36 N | 122 33 19 W |
| Sand Lake | Reservoir | 3 | Multnomah | 45 39 50 N | 122 50 06 W |
| Sandee Palisades City Park | Park | 58 | Multnomah | 45 31 23 N | 122 22 41 W |
| Sandy | Locale | 18 | Multnomah | 45 32 32 N | 122 21 27 W |
| Sandy Post Office (historical) | Post Office | 14 | Multnomah | 45 32 29 N | 122 22 44 W |
| Sandy River | Stream | | Multnomah | 45 34 05 N | 122 24 03 W |
| Sauvie Island | Island | 3 | Multnomah | 45 42 59 N | 122 48 04 W |
| Sauvie Island Boat Ramp | Park | 5 | Multnomah | 45 39 15 N | 122 50 21 W |
| Sauvie Island Bridge | Bridge | 3 | Multnomah | 45 37 41 N | 122 49 01 W |
| Sauvie Island Game Management Area | Park | 3 | Multnomah | 45 43 14 N | 122 48 09 W |
| Sauvie Island School | School | 12 | Multnomah | 45 39 20 N | 122 49 33 W |
| Sauvies (historical) | Locale | 8 | Multnomah | 45 42 39 N | 122 46 21 W |
| Sauvies Island Post Office (historical) | Post Office | 8 | Multnomah | 45 41 04 N | 122 46 45 W |
| Sauvies Post Office (historical) | Post Office | 7 | Multnomah | 45 42 39 N | 122 46 18 W |
| School Section Lake | Lake | 4 | Multnomah | 45 39 32 N | 122 48 26 W |
| Schoolhouse Spring | Spring | 515 | Multnomah | 45 32 11 N | 122 09 34 W |
| Sckavone Stadium | Park | 18 | Multnomah | 45 27 56 N | 122 38 21 W |
| Scott School | School | 55 | Multnomah | 45 33 17 N | 122 35 37 W |
| Sellwood | Populated Place | 35 | Multnomah | 45 27 52 N | 122 39 09 W |
| Sellwood Bridge | Bridge | 3 | Multnomah | 45 27 51 N | 122 39 55 W |
| Sellwood City Park | Park | 38 | Multnomah | 45 28 05 N | 122 39 33 W |
| Sellwood Community Center | Building | 34 | Multnomah | 45 27 49 N | 122 39 02 W |
| Sellwood Post Office (historical) | Post Office | 35 | Multnomah | 45 27 52 N | 122 39 09 W |
| Sellwood Riverfront City Park | Park | 4 | Multnomah | 45 28 05 N | 122 39 52 W |
| Sellwood School | School | 32 | Multnomah | 45 27 44 N | 122 39 00 W |
| Sellwood-Moreland Post Office | Post Office | 35 | Multnomah | 45 27 50 N | 122 39 11 W |
| Senior Recreation | Building | 39 | Multnomah | 45 31 34 N | 122 39 10 W |
| Senn's Dairy City Park | Park | 28 | Multnomah | 45 33 17 N | 122 32 52 W |
| Sentinel Hill (historical) | Locale | 293 | Multnomah | 45 29 22 N | 122 41 45 W |
| Serendipity Academy | School | 72 | Multnomah | 45 30 21 N | 122 30 34 W |
| Sester Dam Number 1 | Dam | 179 | Multnomah | 45 28 47 N | 122 19 10 W |
| Sester Reservoir Number 1 | Reservoir | 179 | Multnomah | 45 28 47 N | 122 19 10 W |
| Sesters Reservoirs | Reservoir | 194 | Multnomah | 45 28 54 N | 122 18 44 W |
| Sewallcrest City Park | Park | 46 | Multnomah | 45 30 34 N | 122 37 57 W |
| Sewallcrest School | School | 46 | Multnomah | 45 30 37 N | 122 37 54 W |
| Sewer Trail | Trail | 530 | Multnomah | 45 29 46 N | 122 05 14 W |
| Shahapta (historical) | Locale | 126 | Multnomah | 45 28 03 N | 122 43 10 W |
| Shattuck (historical) | Locale | 79 | Multnomah | 45 29 14 N | 122 44 24 W |
| Shattuck Post Office (historical) | Post Office | 83 | Multnomah | 45 29 14 N | 122 43 54 W |
| Shattuck School | School | 50 | Multnomah | 45 30 37 N | 122 41 04 W |
| Shaver Mooring | Locale | 3 | Multnomah | 45 33 34 N | 122 43 34 W |
| Shaver School | School | 32 | Multnomah | 45 32 59 N | 122 31 44 W |
| Shepperds Dell | Valley | 40 | Multnomah | 45 32 53 N | 122 11 46 W |
| Shepperds Dell State Park | Park | 88 | Multnomah | 45 32 48 N | 122 11 49 W |
| Sheridan State Park | Park | 98 | Multnomah | 45 38 57 N | 121 54 24 W |
| Sherrard Point | Summit | 1146 | Multnomah | 45 31 59 N | 122 05 17 W |
| Shops (historical) | Locale | 21 | Multnomah | 45 29 57 N | 122 40 22 W |
| Shriners Hospital | Hospital | 64 | Multnomah | 45 33 06 N | 122 34 39 W |
| Signal Oil Spur (historical) | Locale | 15 | Multnomah | 45 35 49 N | 122 47 01 W |
| Sitton School | School | 31 | Multnomah | 45 35 59 N | 122 45 29 W |
| Sky Ranch | Locale | 407 | Multnomah | 45 40 31 N | 122 55 02 W |
| Skyline Memorial Gardens | Cemetery | 328 | Multnomah | 45 33 09 N | 122 46 44 W |
| Skyline School | School | 221 | Multnomah | 45 36 27 N | 122 51 24 W |
| Slough Post Office (historical) | Post Office | 11 | Multnomah | 45 36 07 N | 122 39 48 W |
| Smith and Bybee Lakes Wildlife Area | Park | 6 | Multnomah | 45 37 02 N | 122 46 42 W |
| Smith Creek | Stream | | Multnomah | 45 30 47 N | 122 20 15 W |
| Smith Lake | Lake | 3 | Multnomah | 45 36 39 N | 122 43 27 W |
| Smith School | School | 150 | Multnomah | 45 27 37 N | 122 43 50 W |
| South Channel | Channel | 5 | Multnomah | 45 33 46 N | 122 24 58 W |
| South Fork Beaver Creek | Stream | | Multnomah | 45 29 44 N | 122 21 59 W |
| South Fork Gordon Creek | Stream | | Multnomah | 45 30 04 N | 122 08 59 W |
| South Park Blocks | Park | 54 | Multnomah | 45 30 40 N | 122 41 11 W |
| South Portland (historical) | Populated Place | 88 | Multnomah | 45 29 15 N | 122 40 57 W |
| South Powellhurst School | School | 83 | Multnomah | 45 30 03 N | 122 32 12 W |
| South Rockwood Park | Park | 77 | Multnomah | 45 31 01 N | 122 28 19 W |
| South Rockwood School | School | 77 | Multnomah | 45 30 59 N | 122 28 31 W |
| South Waterfront City Park | Park | 15 | Multnomah | 45 30 31 N | 122 40 25 W |
| Southeast Community Park | Park | 146 | Multnomah | 45 28 56 N | 122 22 41 W |
| Southeast Neighborhood Park | Park | 144 | Multnomah | 45 28 31 N | 122 23 49 W |
| Southern Portland (historical) | Locale | 15 | Multnomah | 45 28 46 N | 122 40 24 W |
| Southwest Community Center | Building | 107 | Multnomah | 45 28 32 N | 122 43 20 W |
| Southwest Community Park | Park | 82 | Multnomah | 45 29 24 N | 122 28 01 W |
| Spring Garden City Park | Park | 150 | Multnomah | 45 27 41 N | 122 42 43 W |
| Springdale | Populated Place | 94 | Multnomah | 45 31 08 N | 122 19 47 W |
| Springdale School | School | 93 | Multnomah | 45 31 09 N | 122 19 49 W |
| Springville (historical) | Locale | 74 | Multnomah | 45 35 09 N | 122 46 24 W |
| Springville Post Office (historical) | Post Office | 74 | Multnomah | 45 35 09 N | 122 46 24 W |
| Springwater Corridor Trail | Park | 63 | Multnomah | 45 28 34 N | 122 33 24 W |
| Springwater on the Willamette | Park | 67 | Multnomah | 45 28 49 N | 122 34 18 W |
| Springwater Trail | Park | | Multnomah | 45 29 19 N | 122 27 24 W |
| St Johns Community Center | Building | 41 | Multnomah | 45 35 32 N | 122 45 11 W |
| St Johns Racquet Center | Building | 44 | Multnomah | 45 35 27 N | 122 45 21 W |
| Stark Street Island | Park | 86 | Multnomah | 45 31 06 N | 122 33 16 W |
| Station L Airstrip (historical) | Airport | 12 | Multnomah | 45 30 26 N | 122 39 56 W |
| Steel Bridge | Bridge | 3 | Multnomah | 45 31 39 N | 122 40 08 W |
| Stephens Creek Natural Area | Park | 125 | Multnomah | 45 28 19 N | 122 41 43 W |
| Stephenson School | School | 160 | Multnomah | 45 26 29 N | 122 42 14 W |
| Stevens Point | Cape | 3 | Multnomah | 45 28 31 N | 122 40 04 W |
| Stone (historical) | Locale | 30 | Multnomah | 45 36 54 N | 121 59 48 W |
| Stone City Park | Park | 56 | Multnomah | 45 31 50 N | 122 26 07 W |
| Stone Reservoir | Reservoir | 56 | Multnomah | 45 31 54 N | 122 26 09 W |
| Stotts Landing (historical) | Locale | 6 | Multnomah | 45 33 55 N | 122 24 35 W |
| Strathmore Park | Park | 18 | Multnomah | 45 33 09 N | 122 31 07 W |
| Sullivan Gulch | Valley | | Multnomah | 45 31 31 N | 122 39 49 W |
| Sumner-Albina City Park | Park | 65 | Multnomah | 45 33 36 N | 122 40 33 W |
| Sundial Beach | Beach | 6 | Multnomah | 45 34 00 N | 122 24 18 W |
| Sunnyside School | School | 48 | Multnomah | 45 30 52 N | 122 37 43 W |
| Sunnyside School Park | Park | 47 | Multnomah | 45 30 53 N | 122 37 47 W |
| Sunnyview Post Office (historical) | Post Office | 51 | Multnomah | 45 31 00 N | 122 37 21 W |
| Sunrise City Park | Park | 91 | Multnomah | 45 31 32 N | 122 23 33 W |
| Sunset Pacific Oil Company Spurs (historical) | Locale | 13 | Multnomah | 45 35 22 N | 122 46 33 W |
| Swan Island | Island | 12 | Multnomah | 45 33 38 N | 122 42 32 W |
| Swan Island Basin | Bay | 3 | Multnomah | 45 33 54 N | 122 42 39 W |
| Swan Island Post Office (historical) | Post Office | 7 | Multnomah | 45 33 55 N | 122 42 29 W |
| Sweet Briar School | School | 71 | Multnomah | 45 30 59 N | 122 22 54 W |