Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Southwest Bayou | Stream | | Cameron | 29 48 41 N | 092 40 24 W |
| Southwest Bourg Gas Field | Oilfield | 0 | Terrebonne | 29 31 31 N | 090 39 15 W |
| Southwest Branch | Gut | 1 | St. Bernard | 29 57 26 N | 089 31 47 W |
| Southwest Deer Park Oil Field | Oilfield | 13 | Concordia | 31 22 58 N | 091 37 07 W |
| Southwest Delhi Oil Field | Oilfield | 26 | Franklin | 32 23 10 N | 091 36 26 W |
| Southwest Demery Creek Gas Field | Oilfield | 59 | Natchitoches | 32 00 44 N | 093 07 39 W |
| Southwest Elementary School | School | 19 | St. Landry | 30 31 35 N | 092 05 51 W |
| Southwest Esther Gas Field | Oilfield | 1 | Vermilion | 29 49 59 N | 092 14 15 W |
| Southwest Gueydan Gas Field | Oilfield | 2 | Vermilion | 29 59 31 N | 092 33 15 W |
| Southwest Kinder Gas Field | Oilfield | 11 | Allen | 30 26 46 N | 092 55 16 W |
| Southwest Lake Arthur Gas Field | Oilfield | 0 | Cameron | 30 01 01 N | 092 51 01 W |
| Southwest Lake Boeuf Gas Field | Oilfield | 0 | Lafourche | 29 45 16 N | 090 39 53 W |
| Southwest Lillie Oil Field | Oilfield | 65 | Claiborne | 32 56 46 N | 092 45 31 W |
| Southwest Louisiana Baptist Encampment | Locale | 32 | Beauregard | 30 40 20 N | 093 02 36 W |
| Southwest Louisiana Boys Village | Locale | 5 | Calcasieu | 30 14 01 N | 093 04 55 W |
| Southwest Louisiana Vocational Technical School | School | 5 | Acadia | 30 12 19 N | 092 23 35 W |
| Southwest Mermentau Gas Field | Oilfield | 2 | Acadia | 30 08 50 N | 092 34 53 W |
| Southwest Pass | Channel | 13 | Plaquemines | 29 00 51 N | 089 20 39 W |
| Southwest Pass | Channel | 4 | St. Bernard | 29 56 07 N | 089 17 08 W |
| Southwest Pass | Gap | 2 | Vermilion | 29 34 26 N | 092 02 43 W |
| Southwest Pass Lighthouse | Building | 0 | Plaquemines | 28 58 19 N | 089 23 31 W |
| Southwest Point | Cape | 0 | Vermilion | 29 36 50 N | 092 00 32 W |
| Southwest Ridge Gas Field | Oilfield | 8 | Lafayette | 30 10 06 N | 092 10 12 W |
| Southwest School (historical) | School | 45 | Washington | 30 44 34 N | 090 14 15 W |
| Southwestern Canal | Canal | 2 | Jefferson Davis | 30 05 28 N | 092 49 26 W |
| Southwestern Louisiana Canal | Canal | 0 | Lafourche | 29 15 13 N | 090 10 51 W |
| Southwestern Training School | School | 11 | Lafayette | 30 12 44 N | 092 00 57 W |
| Southwinds | Populated Place | 20 | Ouachita | 32 28 43 N | 092 02 19 W |
| Southwood | Populated Place | 6 | Ascension | 30 13 09 N | 091 02 57 W |
| Southwood High School | School | 77 | Caddo | 32 24 31 N | 093 48 59 W |
| Southwood Park | Park | 4 | Ascension | 30 16 49 N | 090 58 22 W |
| Southwood Ridge (subdivision) | Populated Place | 10 | Tangipahoa | 30 28 59 N | 090 26 15 W |
| Southwood Shopping Center | Locale | -1 | Jefferson | 29 52 40 N | 090 02 08 W |
| Sowela School | School | 57 | Beauregard | 30 51 30 N | 093 17 35 W |
| Sowela School | School | 4 | Calcasieu | 30 13 53 N | 093 12 36 W |
| Sowela Technical Institute | School | 3 | Calcasieu | 30 13 09 N | 093 09 36 W |
| Spain Street Church of God in Christ | Church | 1 | Orleans | 29 58 06 N | 090 03 11 W |
| Spanish Bay | Bay | 0 | Plaquemines | 29 22 25 N | 089 23 26 W |
| Spanish Bayou | Gut | 0 | St. Bernard | 29 45 45 N | 089 37 58 W |
| Spanish Bayou | Stream | | Rapides | 31 18 55 N | 092 26 43 W |
| Spanish Branch | Stream | | Rapides | 31 20 58 N | 092 53 43 W |
| Spanish Branch | Stream | | St. Tammany | 30 33 36 N | 089 57 52 W |
| Spanish Branch Church | Church | 82 | Rapides | 31 21 39 N | 092 56 06 W |
| Spanish Cemetery | Cemetery | 86 | De Soto | 32 00 22 N | 093 54 07 W |
| Spanish City | Populated Place | 24 | Ouachita | 32 31 46 N | 092 01 54 W |
| Spanish Commandancia | Building | 2 | Orleans | 29 57 25 N | 090 03 58 W |
| Spanish Fort | Populated Place | 2 | Orleans | 30 01 16 N | 090 04 57 W |
| Spanish Fort (historical) | Locale | 12 | Concordia | 31 05 46 N | 091 42 10 W |
| Spanish Fort Ruins | Locale | 1 | Orleans | 30 01 24 N | 090 04 59 W |
| Spanish Island | Island | 0 | Plaquemines | 29 13 08 N | 089 12 04 W |
| Spanish Lake | Lake | 2 | Iberia | 30 02 43 N | 091 51 06 W |
| Spanish Lake | Lake | 1 | Iberville | 30 17 30 N | 091 02 12 W |
| Spanish Lake | Lake | -3 | Plaquemines | 29 42 34 N | 089 53 30 W |
| Spanish Lake | Lake | 0 | St. Mary | 29 36 40 N | 091 20 22 W |
| Spanish Lake Bayou | Stream | | St. Mary | 29 36 27 N | 091 20 13 W |
| Spanish Lake Dam | Dam | 2 | Iberia | 30 02 43 N | 091 51 06 W |
| Spanish Lake Gas Field | Oilfield | 1 | Plaquemines | 29 43 41 N | 089 53 51 W |
| Spanish Lake Oil Field | Oilfield | 0 | Plaquemines | 29 40 44 N | 089 54 00 W |
| Spanish Mound | Summit | 28 | Grant | 31 41 25 N | 092 37 19 W |
| Spanish Pass | Channel | 0 | Plaquemines | 29 28 32 N | 089 34 13 W |
| Spanish Pass | Gut | 0 | Plaquemines | 29 15 43 N | 089 25 06 W |
| Spanish Plaza | Park | 6 | Orleans | 29 56 56 N | 090 03 47 W |
| Spanish Point | Cape | 0 | Plaquemines | 29 24 48 N | 089 31 12 W |
| Spanish Town Historic District | Park | 16 | East Baton Rouge | 30 27 06 N | 091 11 00 W |
| Spanish Trail Highlands (subdivision) | Populated Place | 1 | St. Tammany | 30 14 56 N | 089 46 15 W |
| Spar Stadium | Park | 70 | Caddo | 32 29 54 N | 093 45 58 W |
| Sparks | Populated Place | 6 | Pointe Coupee | 30 29 56 N | 091 31 38 W |
| Sparta | Populated Place | 64 | Bienville | 32 22 03 N | 093 04 47 W |
| Sparta Baptist Church | Church | 65 | Bienville | 32 22 16 N | 093 04 54 W |
| Sparta Cemetery | Cemetery | 73 | Bienville | 32 22 31 N | 093 04 42 W |
| Sparta Landing | Locale | 21 | Madison | 32 24 06 N | 091 00 40 W |
| Sparta Plantation | Locale | 27 | Madison | 32 25 08 N | 091 01 43 W |
| Spartan Stadium | Park | 3 | Ascension | 30 14 08 N | 090 55 17 W |
| Sparte Lookout Tower | Tower | 88 | Winn | 32 01 13 N | 092 50 02 W |
| Spate Lake | Lake | 52 | Sabine | 31 19 37 N | 093 40 18 W |
| Spaulding | Populated Place | 55 | Caldwell | 31 56 52 N | 092 10 57 W |
| Spaulding Gas Field | Oilfield | 52 | Caldwell | 31 56 04 N | 092 13 00 W |
| Spears School | School | 60 | East Feliciana | 30 47 17 N | 091 05 53 W |
| Spearsville | Populated Place | 58 | Union | 32 56 10 N | 092 36 19 W |
| Spearsville High School | School | 57 | Union | 32 56 11 N | 092 36 10 W |
| Spearsville Lookout Tower | Tower | 67 | Union | 32 54 02 N | 092 33 60 W |
| Special Education School | School | 5 | Vermilion | 29 58 18 N | 092 08 17 W |
| Speckled Goose Pond | Gut | 0 | Plaquemines | 29 17 40 N | 089 14 38 W |
| Speers Pond Dam | Dam | 54 | Claiborne | 32 59 37 N | 092 57 37 W |
| Spell Pond | Reservoir | 29 | St. Tammany | 30 34 25 N | 090 07 48 W |
| Spells Pond Dam | Dam | 29 | St. Tammany | 30 34 25 N | 090 07 48 W |
| Spencer | Populated Place | 37 | Union | 32 44 24 N | 092 07 54 W |
| Spencer Bayou | Gut | 15 | Catahoula | 31 32 12 N | 091 59 29 W |
| Spencer Canal | Canal | 0 | Vermilion | 29 57 46 N | 092 31 00 W |
| Spencer Cemetery | Cemetery | 25 | La Salle | 31 34 15 N | 092 07 02 W |
| Spencer Cemetery | Cemetery | 33 | Union | 32 41 45 N | 092 07 28 W |
| Spencer Cemetery | Cemetery | 54 | Washington | 30 45 49 N | 090 03 49 W |
| Spencer Mill Lake | Lake | 5 | St. Tammany | 30 26 55 N | 089 45 02 W |
| Spencer Post Office | Post Office | 37 | Union | 32 44 58 N | 092 08 03 W |
| Spencer School | School | 9 | Iberia | 29 54 04 N | 091 54 37 W |
| Sphinx Landing | Locale | 16 | Caldwell | 31 59 00 N | 091 58 24 W |
| Spice Bayou | Gut | 20 | Richland | 32 19 41 N | 091 51 40 W |
| Spicewood Pond (historical) | Lake | 20 | Ouachita | 32 33 16 N | 091 57 46 W |
| Spider (historical) | Populated Place | 103 | De Soto | 31 57 09 N | 093 46 40 W |
| Spider Gas Field | Oilfield | 80 | De Soto | 31 58 54 N | 093 48 09 W |
| Spike Bay | Gut | 4 | Iberville | 30 09 01 N | 091 26 46 W |
| Spikes Cemetery | Cemetery | 28 | Beauregard | 30 33 43 N | 093 41 45 W |
| Spikes Lake | Reservoir | 32 | Beauregard | 30 34 11 N | 093 32 23 W |
| Spikner Cemetery | Cemetery | 59 | Union | 32 49 13 N | 092 14 35 W |
| Spiller Branch | Stream | | St. Helena | 30 44 16 N | 090 34 55 W |
| Spillers Cemetery | Cemetery | 63 | Union | 32 35 14 N | 092 21 46 W |
| Spillers Club Airport | Airport | 5 | St. Martin | 30 13 46 N | 091 54 30 W |
| Spillers Creek | Stream | | Livingston | 30 36 26 N | 090 56 32 W |
| Spillman | Populated Place | 78 | West Feliciana | 30 55 48 N | 091 17 01 W |
| Spillman Cemetery | Cemetery | 56 | West Feliciana | 30 55 08 N | 091 17 30 W |