Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Marrero | Populated Place | 1 | Jefferson | 29 53 58 N | 090 06 01 W |
| Marrero Post Office | Post Office | 1 | Jefferson | 29 53 58 N | 090 06 02 W |
| Marrero Shopping Center | Locale | 1 | Jefferson | 29 53 46 N | 090 05 45 W |
| Mars Branch | Stream | | Livingston | 30 32 55 N | 090 42 28 W |
| Mars Hill | Populated Place | 60 | Winn | 31 43 06 N | 092 47 49 W |
| Mars Hill Baptist Church | Church | 21 | Rapides | 31 15 55 N | 092 25 51 W |
| Mars Hill Cemetery | Cemetery | 59 | Winn | 31 43 09 N | 092 47 42 W |
| Mars Hill Church | Church | 64 | La Salle | 31 39 56 N | 092 09 21 W |
| Mars Hill Church | Church | 59 | Winn | 31 43 08 N | 092 47 46 W |
| Mars Hill Creek | Stream | | Winn | 31 42 50 N | 092 46 31 W |
| Mars Hill Missionary Baptist Church | Church | 1 | Orleans | 29 56 23 N | 090 05 08 W |
| Marsalis | Populated Place | 125 | Claiborne | 32 39 48 N | 092 57 25 W |
| Marsalis Ponds | Lake | 110 | Claiborne | 32 41 14 N | 092 59 54 W |
| Marseillaise Bayou | Stream | | Cameron | 29 50 08 N | 092 52 31 W |
| Marsh Bayou | Stream | | Jefferson Davis | 30 23 12 N | 093 05 14 W |
| Marsh Bayou Cutoff | Bend | 1 | Jefferson Davis | 30 22 52 N | 093 05 26 W |
| Marsh Bayou State Wildlife Management Area | Area | 39 | Evangeline | 30 49 28 N | 092 34 41 W |
| Marsh Canal | Canal | 6 | Acadia | 30 13 37 N | 092 24 44 W |
| Marsh Island | Island | 0 | Iberia | 29 33 59 N | 091 50 46 W |
| Marsh Landing | Locale | 20 | Caldwell | 32 11 48 N | 092 07 28 W |
| Marshall Cemetery | Cemetery | 59 | Bossier | 32 23 50 N | 093 27 19 W |
| Marshall Chapel | Church | 69 | De Soto | 32 19 02 N | 093 45 49 W |
| Marshall Creek | Stream | | Rapides | 31 00 23 N | 092 25 24 W |
| Marshall Cutoff | Channel | 16 | Madison | 32 25 28 N | 091 00 41 W |
| Marshall Hill School (historical) | School | 61 | Bossier | 32 25 01 N | 093 32 44 W |
| Marshall Landing | Locale | 10 | Caldwell | 32 01 11 N | 091 59 05 W |
| Marshfield Canal | Canal | 1 | Iberia | 30 02 30 N | 091 40 20 W |
| Marston (historical) | Populated Place | 33 | Washington | 30 50 05 N | 089 50 53 W |
| Martello Castle | Populated Place | 10 | St. Bernard | 29 56 43 N | 089 50 06 W |
| Marth Vinyard Elementary School | School | 7 | Tangipahoa | 30 26 39 N | 090 23 52 W |
| Marthas Chapel | Church | 23 | Rapides | 31 22 53 N | 092 09 21 W |
| Marthaville | Populated Place | 74 | Natchitoches | 31 44 20 N | 093 23 48 W |
| Marthaville Elementary School | School | 80 | Natchitoches | 31 44 25 N | 093 23 56 W |
| Marthaville Post Office | Post Office | 77 | Natchitoches | 31 44 21 N | 093 23 32 W |
| Martien Chapel African Methodist Episcopal Church | Church | 27 | Tangipahoa | 30 38 09 N | 090 30 25 W |
| Martigan Point | Cape | 0 | Jefferson | 29 15 57 N | 090 01 07 W |
| Martin | Populated Place | 1 | Plaquemines | 29 33 49 N | 089 46 25 W |
| Martin | Populated Place | 73 | Red River | 32 05 08 N | 093 13 13 W |
| Martin Bay | Lake | 8 | Avoyelles | 31 02 36 N | 091 44 02 W |
| Martin Behrman Elementary School | School | 2 | Orleans | 29 56 54 N | 090 02 56 W |
| Martin Cemetery | Cemetery | 37 | Allen | 30 51 27 N | 092 55 48 W |
| Martin Cemetery | Cemetery | 113 | Claiborne | 32 44 41 N | 093 11 44 W |
| Martin Cemetery | Cemetery | 54 | Natchitoches | 31 42 22 N | 093 11 46 W |
| Martin Cemetery | Cemetery | 67 | Red River | 32 05 11 N | 093 13 15 W |
| Martin Cemetery | Cemetery | 87 | St. Helena | 30 58 52 N | 090 40 14 W |
| Martin Cemetery | Cemetery | 16 | Tangipahoa | 30 32 57 N | 090 30 43 W |
| Martin Cemetery | Cemetery | 84 | Washington | 30 54 51 N | 090 06 02 W |
| Martin Cemetery | Cemetery | 98 | Washington | 30 56 14 N | 089 58 18 W |
| Martin Church | Church | 83 | Red River | 32 07 07 N | 093 15 16 W |
| Martin Creek | Stream | | Bossier | 32 58 40 N | 093 31 52 W |
| Martin Creek | Stream | | Vernon | 31 16 53 N | 093 18 26 W |
| Martin Creek | Stream | | Vernon | 31 15 29 N | 093 30 45 W |
| Martin High School | School | 64 | Red River | 32 05 36 N | 093 13 18 W |
| Martin Island | Island | 1 | St. Bernard | 29 57 33 N | 089 11 51 W |
| Martin Island Gas Field | Oilfield | 0 | St. Charles | 29 52 35 N | 090 30 50 W |
| Martin Junction | Populated Place | 78 | Webster | 32 25 29 N | 093 16 56 W |
| Martin Junior High School | School | 21 | Catahoula | 31 50 20 N | 091 40 42 W |
| Martin Lookout Tower | Tower | 80 | Red River | 32 04 43 N | 093 13 08 W |
| Martin Luther King Junior Christian Academy | School | 17 | East Baton Rouge | 30 29 23 N | 091 08 20 W |
| Martin Luther King Junior Park | Park | -1 | Jefferson | 29 52 48 N | 090 03 57 W |
| Martin Luther King Multipurpose Center | Building | 12 | Lafayette | 30 14 53 N | 092 01 33 W |
| Martin Luther King Park | Park | 5 | Acadia | 30 12 55 N | 092 22 43 W |
| Martin Luther King Receation Center | Building | 5 | Calcasieu | 30 15 46 N | 093 11 15 W |
| Martin Park Elementary School | School | 24 | Rapides | 31 15 09 N | 092 26 56 W |
| Martin Petitjean Elementary School | School | 9 | Acadia | 30 13 42 N | 092 16 50 W |
| Martin Slough | Gut | 27 | Franklin | 32 20 43 N | 091 32 48 W |
| Martin Springs Cemetery | Cemetery | 41 | Rapides | 31 04 56 N | 092 28 47 W |
| Martin Temple Christian Methodist | Church | 21 | Ouachita | 32 30 48 N | 092 06 02 W |
| Martinbox Bayou | Gut | 0 | St. Bernard | 29 52 13 N | 089 17 32 W |
| Martinez Landing | Locale | 19 | Avoyelles | 31 09 36 N | 092 11 20 W |
| Martinez School (historical) | School | 70 | Sabine | 31 36 47 N | 093 40 10 W |
| Martins Canal | Canal | 0 | Plaquemines | 29 30 41 N | 089 44 34 W |
| Martins Island | Island | -1 | St. Charles | 29 52 38 N | 090 29 57 W |
| Martins Landing | Populated Place | 11 | Tensas | 31 50 04 N | 091 34 08 W |
| Martins Pass | Channel | -2 | Plaquemines | 29 10 31 N | 089 13 33 W |
| Martins Store (historical) | Locale | 78 | Webster | 32 41 60 N | 093 18 56 W |
| Martinville | Populated Place | 40 | St. Tammany | 30 35 58 N | 090 10 45 W |
| Marwede (subdivision) | Populated Place | 14 | East Baton Rouge | 30 26 19 N | 091 09 23 W |
| Marx Street Church of Christ | Church | 22 | Ouachita | 32 28 54 N | 092 05 49 W |
| Mary Bowers Pond | Bay | 0 | Plaquemines | 29 13 35 N | 089 16 15 W |
| Mary Branch | Stream | | Natchitoches | 31 28 41 N | 092 52 48 W |
| Mary Branch | Stream | | St. Tammany | 30 41 52 N | 090 15 08 W |
| Mary Cane Lake | Lake | 4 | St. Landry | 30 30 47 N | 091 47 18 W |
| Mary Church Terrell Elementary School | School | 0 | Orleans | 29 57 37 N | 090 06 30 W |
| Mary Cox Bridge | Bridge | 35 | Natchitoches | 31 55 06 N | 093 23 56 W |
| Mary D Coghill Elementary School | School | -1 | Orleans | 30 00 58 N | 090 02 19 W |
| Mary Evergreen Church | Church | 103 | Caddo | 32 13 28 N | 093 59 54 W |
| Mary Evergreen Church | Church | 46 | Caddo | 32 19 16 N | 093 37 36 W |
| Mary Evergreen Church | Church | 102 | De Soto | 32 03 51 N | 093 46 39 W |
| Mary Goff Elementary School | School | 48 | Rapides | 31 24 40 N | 092 27 40 W |
| Mary Gross Baptist Church | Church | 23 | Ouachita | 32 31 04 N | 092 04 23 W |
| Mary Hines Elementary School | School | 5 | St. Mary | 29 52 45 N | 091 31 40 W |
| Mary Magdalene Baptist Church | Church | 66 | Caddo | 32 26 30 N | 093 45 10 W |
| Mary Magdalene Cemetery | Cemetery | 44 | Bossier | 32 16 02 N | 093 28 60 W |
| Mary Magdalene Church | Church | 43 | Bossier | 32 15 47 N | 093 28 31 W |
| Mary Magdalene Church | Church | 42 | Red River | 32 02 03 N | 093 24 52 W |
| Mary McLeod Bethune Elementary School | School | -1 | Orleans | 29 58 22 N | 090 06 51 W |
| Mary Plantation | Locale | 2 | St. Charles | 30 00 43 N | 090 29 46 W |
| Mary Queen of Peace Church | Church | 47 | Bossier | 32 24 04 N | 093 36 60 W |
| Mary Smith Pond Dam | Dam | 86 | Vernon | 31 15 13 N | 093 00 13 W |
| Mary-Queen of Heaven Chapel | Church | 65 | Bossier | 32 40 33 N | 093 44 10 W |
| Marydale Plantation | Locale | 20 | Tensas | 32 01 56 N | 091 23 25 W |
| Marydale Scout Camp | Locale | 57 | West Feliciana | 30 50 17 N | 091 22 15 W |
| Maryetta Cemetery | Cemetery | 50 | St. Tammany | 30 36 39 N | 090 02 41 W |
| Maryhill Seminary | Church | 45 | Rapides | 31 21 47 N | 092 25 30 W |
| Maryhill Seminary Cemetery | Cemetery | 47 | Rapides | 31 21 36 N | 092 25 33 W |
| Maryland | Populated Place | 21 | East Baton Rouge | 30 32 46 N | 091 10 33 W |
| Maryland | Populated Place | 2 | St. Mary | 29 42 45 N | 091 27 45 W |
| Maryland | Populated Place | 21 | Tensas | 31 55 22 N | 091 22 07 W |
| Maryland Church | Church | 9 | Acadia | 30 20 11 N | 092 16 10 W |