Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| South Twin Lake Recreation Site | Locale | 1333 | Deschutes | 43 44 04 N | 121 46 12 W |
| South Twomile Creek | Stream | | Coos | 43 03 02 N | 124 25 07 W |
| South Umpqua Experimental Forest | Forest | 787 | Douglas | 43 00 46 N | 122 43 07 W |
| South Umpqua Falls | Falls | 506 | Douglas | 43 03 15 N | 122 41 08 W |
| South Umpqua Falls Recreation Site | Locale | 1444 | Douglas | 43 03 14 N | 122 31 11 W |
| South Umpqua Guard Station | Locale | 504 | Douglas | 43 03 17 N | 122 41 23 W |
| South Umpqua River | Stream | | Douglas | 43 16 04 N | 123 26 46 W |
| South Umpqua Safety Rest Area | Locale | 181 | Douglas | 43 03 44 N | 123 20 44 W |
| South Village City Park | Park | 105 | Marion | 44 54 05 N | 123 02 04 W |
| South Waldo Shelter | Locale | 1662 | Lane | 43 40 41 N | 122 03 20 W |
| South Walker Spring | Spring | 1714 | Klamath | 43 15 50 N | 121 43 12 W |
| South Wall Rock Reservoir | Reservoir | 1242 | Malheur | 43 28 06 N | 117 30 54 W |
| South Warm Springs Creek | Stream | | Harney | 43 15 27 N | 119 14 55 W |
| South Warner Rim | Ridge | 1830 | Lake | 42 06 08 N | 119 58 29 W |
| South Waterfront City Park | Park | 15 | Multnomah | 45 30 31 N | 122 40 25 W |
| South Willow Creek | Stream | | Malheur | 44 20 07 N | 117 56 13 W |
| South Willow Creek Butte Reservoir | Reservoir | 1661 | Malheur | 42 01 54 N | 117 05 42 W |
| South Willow Reservoir | Reservoir | 2356 | Harney | 42 03 14 N | 118 14 30 W |
| South Wind Creek Reservoir | Reservoir | 1397 | Grant | 44 16 08 N | 119 37 60 W |
| South Wolf Creek | Stream | | Tillamook | 45 30 54 N | 123 37 06 W |
| South Wye (historical) | Locale | 1330 | Baker | 44 44 05 N | 118 11 60 W |
| South Yamhill (historical) | Locale | 56 | Polk | 45 04 19 N | 123 15 59 W |
| South Yamhill Cemetery | Cemetery | 76 | Yamhill | 45 10 16 N | 123 16 50 W |
| South Yamhill Post Office (historical) | Post Office | 55 | Polk | 45 04 20 N | 123 15 55 W |
| South Yamhill River | Stream | | Yamhill | 45 13 33 N | 123 08 41 W |
| Southard Lake | Lake | 867 | Curry | 42 39 04 N | 124 07 19 W |
| Southeast Black Rock | Island | 2 | Curry | 42 46 02 N | 124 36 23 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 |
| Southeast Shore Recreation Site | Locale | 1261 | Baker | 44 40 10 N | 118 00 13 W |
| Southern Lites Park | Park | 108 | Clackamas | 45 26 06 N | 122 32 32 W |
| Southern Oregon State University | School | 609 | Jackson | 42 11 09 N | 122 41 34 W |
| Southern Oregon University Nat | Park | | Jackson | 42 10 36 N | 122 41 41 W |
| Southern Portland (historical) | Locale | 15 | Multnomah | 45 28 46 N | 122 40 24 W |
| Southgate Park | Park | 57 | Polk | 44 50 35 N | 123 13 12 W |
| Southgate Post Office (historical) | Post Office | 64 | Clackamas | 45 27 04 N | 122 34 42 W |
| Southman Creek | Stream | | Lincoln | 44 59 12 N | 123 53 42 W |
| Southport | Locale | 9 | Coos | 43 17 53 N | 124 13 13 W |
| Southport Creek | Stream | | Coos | 43 17 44 N | 124 12 59 W |
| Southport Mine | Mine | 58 | Coos | 43 18 09 N | 124 13 17 W |
| Southside County Park | Park | 4 | Douglas | 43 44 09 N | 124 02 54 W |
| Southside Park | Park | 1254 | Klamath | 42 10 55 N | 121 43 44 W |
| Southside Post Office | Post Office | 136 | Lane | 44 01 35 N | 123 05 29 W |
| Southside Spring | Spring | 1609 | Harney | 43 08 29 N | 119 51 05 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 |
| Southwest Shore Recreation Site | Locale | 1245 | Baker | 44 40 33 N | 118 04 54 W |
| Southwestern Oregon Community College | School | 32 | Coos | 43 23 40 N | 124 15 11 W |
| Southwood City Park | Park | 77 | Clackamas | 45 25 34 N | 122 44 24 W |
| Southworth Cemetery | Cemetery | 1442 | Grant | 44 11 19 N | 118 59 14 W |
| Southworth Creek | Stream | | Lincoln | 44 24 45 N | 123 59 15 W |
| Southworth Ditch | Canal | 1430 | Grant | 44 09 20 N | 118 57 19 W |
| Southworth Ranch | Locale | 1425 | Grant | 44 08 59 N | 118 58 44 W |
| Souva Creek | Stream | | Wasco | 45 12 23 N | 121 25 20 W |
| Sow and Pigs | Island | -8 | Tillamook | 45 33 19 N | 123 55 49 W |
| Sow Bug Lake | Lake | 1839 | Klamath | 43 30 06 N | 122 05 17 W |
| Sow Creek | Stream | | Douglas | 43 21 14 N | 123 39 25 W |
| SP Connection Albany | Locale | 67 | Linn | 44 38 07 N | 123 05 27 W |
| Spada Dam | Dam | 42 | Marion | 45 12 41 N | 122 54 28 W |
| Spada Reservoir | Reservoir | 33 | Marion | 45 12 34 N | 122 54 39 W |
| Spady Reservoir | Reservoir | 62 | Marion | 44 57 14 N | 122 52 14 W |
| Spain Saddle | Gap | 1222 | Wallowa | 45 46 58 N | 116 48 01 W |
| Spalding Dam | Dam | 1673 | Lake | 42 11 30 N | 119 22 16 W |
| Spalding Pond Recreation Site | Locale | 1013 | Josephine | 42 20 47 N | 123 42 13 W |
| Spalding Ranch | Locale | 1609 | Lake | 42 13 38 N | 119 24 49 W |
| Spalding Reservoir | Reservoir | 1673 | Harney | 42 11 30 N | 119 22 12 W |
| Spalding Reservoir | Reservoir | 338 | Josephine | 42 19 59 N | 123 20 26 W |
| Spangler (historical) | Locale | 187 | Clackamas | 45 15 33 N | 122 33 34 W |
| Spangler Gulch | Valley | | Josephine | 42 33 29 N | 123 35 44 W |
| Spangler Hill | Summit | 200 | Clackamas | 45 15 13 N | 122 34 38 W |
| Spangler Pond | Reservoir | 119 | Washington | 45 27 34 N | 123 02 34 W |
| Spangler Spring | Spring | 1300 | Wallowa | 45 42 60 N | 117 06 59 W |
| Spaniol Reservoir | Reservoir | 225 | Washington | 45 42 09 N | 123 05 09 W |
| Spanish Charlie Basin | Basin | 1305 | Malheur | 43 24 26 N | 117 04 56 W |
| Spanish Flat | Flat | 1795 | Lake | 42 23 12 N | 119 39 50 W |
| Spanish Gulch | Valley | | Jackson | 42 18 09 N | 123 12 44 W |
| Spanish Gulch | Valley | | Wheeler | 44 30 07 N | 119 45 19 W |
| Spanish Gulch Cemetery | Cemetery | 1169 | Wheeler | 44 27 60 N | 119 46 24 W |
| Spanish Hollow | Valley | | Sherman | 45 40 18 N | 120 49 48 W |
| Spanish Hollow (historical) | Locale | 320 | Sherman | 45 36 59 N | 120 44 14 W |
| Spanish Lake | Lake | 1364 | Lake | 42 05 08 N | 119 47 24 W |
| Spanish Lake | Lake | 1788 | Lake | 42 23 32 N | 119 38 39 W |
| Spanish Peak | Summit | 2092 | Wheeler | 44 24 26 N | 119 46 31 W |
| Spare Spring | Spring | 1835 | Malheur | 42 01 46 N | 117 24 45 W |
| Sparks | Locale | 374 | Umatilla | 45 35 27 N | 118 48 51 W |
| Sparks Creek | Stream | | Lane | 44 09 14 N | 122 21 04 W |
| Sparks Gulch | Valley | | Wasco | 45 00 54 N | 120 52 31 W |
| Sparks Lake | Lake | 1656 | Deschutes | 44 00 56 N | 121 44 43 W |
| Sparks Lake Recreation Site | Locale | 1657 | Deschutes | 44 00 49 N | 121 44 08 W |
| Sparks Spring | Spring | 1114 | Hood River | 45 24 58 N | 121 35 29 W |
| Sparlin Cemetery | Cemetery | 423 | Josephine | 42 14 40 N | 123 16 22 W |
| Sparrowhawk Creek | Stream | | Josephine | 42 25 53 N | 123 24 48 W |
| Sparta | Populated Place | 1253 | Baker | 44 52 16 N | 117 19 27 W |
| Sparta Butte | Summit | 1465 | Baker | 44 53 09 N | 117 20 05 W |
| Sparta Cemetery | Cemetery | 1269 | Baker | 44 52 19 N | 117 19 37 W |
| Sparta Post Office (historical) | Post Office | 1253 | Baker | 44 52 16 N | 117 19 27 W |
| Sparta Spring (historical) | Spring | 1017 | Baker | 44 53 30 N | 117 50 14 W |
| Spatterdock Lake | Lake | 1797 | Lake | 42 15 56 N | 120 50 06 W |
| Spaulding Creek | Stream | | Malheur | 44 12 18 N | 117 54 05 W |
| Spaulding Gulch | Valley | | Baker | 44 45 36 N | 118 12 17 W |
| Spaulding Mill | Locale | 1024 | Josephine | 42 20 42 N | 123 42 13 W |
| Spaulding Reservoir | Reservoir | 290 | Josephine | 42 25 41 N | 123 17 20 W |
| Spaulding Ridge | Ridge | 1894 | Baker | 44 47 42 N | 118 14 20 W |
| Spauldings Spur (historical) | Locale | 108 | Washington | 45 19 11 N | 122 53 59 W |
| Spaur Creek | Stream | | Tillamook | 45 32 08 N | 123 31 31 W |
| Spawn Reservoir | Reservoir | 1955 | Lake | 42 30 60 N | 120 11 09 W |
| Spawning Channel | Channel | 88 | Umatilla | 45 55 41 N | 119 18 16 W |
| Speaker | Populated Place | 597 | Josephine | 42 42 59 N | 123 17 38 W |
| Speaker Placer | Mine | 527 | Josephine | 42 42 42 N | 123 18 37 W |
| Speaker Post Office (historical) | Post Office | 597 | Josephine | 42 42 59 N | 123 17 38 W |