Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Marble Falls High School Auditorium | School | 304 | Burnet | 30 34 58 N | 098 15 12 W |
| Marble Falls High School Stadium | Park | 252 | Burnet | 30 35 08 N | 098 16 41 W |
| Marble Falls Library | Building | 239 | Burnet | 30 34 13 N | 098 16 42 W |
| Marble Falls Middle School | School | 250 | Burnet | 30 35 03 N | 098 16 44 W |
| Marble Falls Police Station | Building | 237 | Burnet | 30 34 13 N | 098 16 39 W |
| Marble Falls Post Office | Post Office | 259 | Burnet | 30 34 57 N | 098 16 26 W |
| Marble Falls Primary School | School | 256 | Burnet | 30 35 38 N | 098 16 30 W |
| Marble Falls Public Library | Building | 175 | Burnet | 29 23 43 N | 098 16 49 W |
| Marble Mine | Mine | 1654 | Brewster | 30 08 06 N | 103 40 17 W |
| Marble Mountain | Locale | 1654 | Brewster | 30 08 06 N | 103 40 17 W |
| Marcado Creek | Stream | | Victoria | 28 49 52 N | 096 44 38 W |
| Marcelina Artesian Well | Well | 5 | Willacy | 26 35 19 N | 097 35 53 W |
| Marcelina Church | Church | 154 | Wilson | 29 11 37 N | 098 05 24 W |
| Marcelinas Creek | Stream | | Karnes | 28 58 48 N | 098 00 15 W |
| Marcelinas Hills | Summit | 170 | Wilson | 29 10 19 N | 098 06 52 W |
| Marcell Elementary School | School | 44 | Hidalgo | 26 12 58 N | 098 20 04 W |
| Marcell School | School | 44 | Hidalgo | 26 13 05 N | 098 20 01 W |
| Marcello Windmill | Locale | 6 | Kenedy | 27 04 50 N | 097 38 26 W |
| March Avenue Baptist Church | Church | 181 | Bexar | 29 20 52 N | 098 29 10 W |
| Marchand Bayou | Stream | | Galveston | 29 21 16 N | 095 00 11 W |
| Marchison Creek | Stream | | Llano | 30 44 37 N | 098 44 04 W |
| Marchs Pond | Lake | 51 | Harris | 30 08 09 N | 095 34 31 W |
| Marcial Creek | Stream | | Zapata | 27 00 11 N | 099 22 02 W |
| Marcial Tank | Reservoir | 99 | Zapata | 26 59 54 N | 099 21 50 W |
| Marco | Populated Place | 562 | McCulloch | 31 08 25 N | 099 34 49 W |
| Marcou Tank | Reservoir | 113 | McMullen | 28 11 16 N | 098 21 23 W |
| Marcou Windmill | Locale | 113 | McMullen | 28 11 11 N | 098 21 25 W |
| Marcus Harrington Park | Park | 188 | Dallas | 32 37 30 N | 096 53 36 W |
| Marcus High School | School | 190 | Denton | 33 03 48 N | 097 03 43 W |
| Marcus Sanders Park | Park | 986 | Gray | 35 31 15 N | 100 57 42 W |
| Marcus Trail | Trail | 2195 | Culberson | 31 57 42 N | 104 52 04 W |
| Marcy Elementary School | School | 801 | Howard | 32 13 04 N | 101 29 09 W |
| Marcy School | School | 803 | Howard | 32 12 56 N | 101 29 23 W |
| Mardi Gras Museum | Building | 1 | Galveston | 29 18 29 N | 094 47 29 W |
| Mare Branch | Stream | | Montgomery | 30 12 00 N | 095 11 04 W |
| Mare Canyon Crossing | Locale | 467 | Terrell | 29 52 18 N | 102 17 12 W |
| Mare Creek | Stream | | Uvalde | 29 36 41 N | 099 51 09 W |
| Mare Pasture Tank | Reservoir | 406 | Foard | 33 52 35 N | 099 35 00 W |
| Mare Tank | Reservoir | 1532 | Hudspeth | 31 58 16 N | 105 34 46 W |
| Mare Tank | Reservoir | 283 | Kinney | 29 13 56 N | 100 45 49 W |
| Mare Tank | Reservoir | 910 | Reeves | 31 26 02 N | 103 49 41 W |
| Mare Trap Windmill | Locale | 188 | Frio | 28 53 24 N | 099 23 22 W |
| Mare Trap Windmill | Locale | 3 | San Patricio | 28 07 09 N | 097 19 11 W |
| Mare Windmill | Locale | 1189 | Culberson | 31 57 58 N | 104 30 31 W |
| Mare Windmill | Locale | 659 | Kent | 33 08 53 N | 101 02 17 W |
| Marek Lake | Reservoir | 157 | Bell | 31 03 19 N | 097 09 01 W |
| Marek Lake Dam | Dam | 157 | Bell | 31 03 19 N | 097 09 01 W |
| Mares Memorial Library | Building | 129 | Galveston | 31 43 04 N | 095 01 42 W |
| Marfa | Populated Place | 1427 | Presidio | 30 18 29 N | 104 01 09 W |
| Marfa and Presidio County Museum | Building | 1605 | Presidio | 30 10 32 N | 104 17 29 W |
| Marfa Elementary School | School | 1434 | Presidio | 30 18 53 N | 104 01 39 W |
| Marfa High School | School | 1431 | Presidio | 30 18 37 N | 104 01 35 W |
| Marfa Municipal Airport | Airport | 1475 | Presidio | 30 22 14 N | 104 01 02 W |
| Marfa Municipal Golf Course | Locale | 1460 | Presidio | 30 19 48 N | 103 59 33 W |
| Margaret | Populated Place | 422 | Foard | 34 02 58 N | 099 39 04 W |
| Margaret B Henderson Elementary School | School | 178 | Dallas | 32 43 27 N | 096 50 42 W |
| Margaret Basin | Valley | | Brewster | 29 22 40 N | 102 54 55 W |
| Margaret Cemetery | Cemetery | 407 | Foard | 34 04 37 N | 099 36 41 W |
| Margaret Jonsson Charlton Methodist Hospital | Hospital | 213 | Dallas | 32 38 47 N | 096 52 36 W |
| Margarita Addition Number 1 Colonia | Populated Place | 56 | Starr | 26 24 37 N | 098 58 38 W |
| Margarita Colonia | Populated Place | 56 | Starr | 26 24 41 N | 098 58 38 W |
| Margarita Tank | Reservoir | 134 | Zapata | 26 49 31 N | 099 03 42 W |
| Margarita Tank | Reservoir | 197 | Zavala | 28 43 24 N | 099 38 02 W |
| Margie | Populated Place | 168 | Leon | 31 13 46 N | 096 07 52 W |
| Margie Lou Branch | Stream | | Bell | 30 58 25 N | 097 18 18 W |
| Margil Elementary School | School | 201 | Bexar | 29 25 56 N | 098 30 51 W |
| Margil School | School | 201 | Bexar | 29 25 56 N | 098 30 51 W |
| Maria Chavez Windmill | Locale | 20 | Hidalgo | 26 42 57 N | 098 05 29 W |
| Maria Estella Artesian Well | Well | 3 | Kenedy | 26 54 38 N | 097 34 19 W |
| Maria Inez Banco Number 46 | Levee | 32 | Hidalgo | 26 10 04 N | 098 20 22 W |
| Maria Lake | Reservoir | 93 | Walker | 30 44 25 N | 095 25 43 W |
| Maria Lake Dam | Dam | 93 | Walker | 30 44 25 N | 095 25 43 W |
| Maria Moreno Elementary School | School | 175 | Dallas | 32 43 28 N | 096 51 26 W |
| Maria Petra Artesian Well | Well | 3 | Kenedy | 27 10 15 N | 097 29 17 W |
| Maria Stella Windmill | Locale | 206 | Jim Hogg | 27 04 38 N | 098 46 14 W |
| Maria Windmill | Locale | 47 | Brooks | 27 09 58 N | 098 13 03 W |
| Mariam | Populated Place | 22 | Liberty | 30 12 51 N | 094 45 16 W |
| Marian Airpark | Airport | 611 | Collingsworth | 34 50 44 N | 100 11 46 W |
| Marian Manor Elementary School | School | 1122 | El Paso | 31 43 04 N | 106 20 28 W |
| Mariana Creek | Stream | | Wilson | 29 07 15 N | 098 12 14 W |
| Maribel School | School | 199 | Grayson | 33 37 57 N | 096 31 01 W |
| Maribelle M Davis Library | Building | 116 | Collin | 29 39 60 N | 096 45 01 W |
| Marie | Locale | 564 | Runnels | 31 53 58 N | 100 12 00 W |
| Marie | Populated Place | 555 | Runnels | 31 53 58 N | 100 12 32 W |
| Marie Gully | Stream | | Orange | 30 03 16 N | 093 50 21 W |
| Marie Huie Alternative Education Center | School | 157 | Dallas | 32 59 54 N | 096 52 42 W |
| Marietta | Populated Place | 107 | Cass | 33 10 24 N | 094 32 33 W |
| Marilee | Populated Place | 211 | Collin | 33 24 13 N | 096 45 41 W |
| Marilla | Populated Place | 682 | Collingsworth | 34 58 47 N | 100 23 51 W |
| Marina at Sea Isle | Locale | -3 | Galveston | 29 09 04 N | 095 03 14 W |
| Marina Bay | Locale | 3 | Harris | 29 33 49 N | 095 02 60 W |
| Marina del Sol | Locale | 1 | Galveston | 29 33 05 N | 095 03 16 W |
| Marine Base Slough | Bay | 254 | Wise | 33 14 45 N | 097 50 14 W |
| Marine Consultants Incorporated Heliport | Airport | 8 | Harris | 29 42 22 N | 095 16 27 W |
| Marine Creek | Stream | | Tarrant | 32 47 03 N | 097 20 16 W |
| Marine Creek Dam | Dam | 196 | Tarrant | 32 49 30 N | 097 23 31 W |
| Marine Creek Lake Park | Park | 213 | Tarrant | 32 49 35 N | 097 24 19 W |
| Marine Creek Reservoir | Reservoir | 195 | Tarrant | 32 49 30 N | 097 23 31 W |
| Marine Military Academy Stadium | Park | 10 | Cameron | 26 13 31 N | 097 40 08 W |
| Marine Park | Park | 170 | Tarrant | 32 46 48 N | 097 21 05 W |
| Marines Cemetery | Cemetery | 123 | Guadalupe | 29 40 15 N | 097 43 53 W |
| Marino Windmill | Locale | 136 | Jim Hogg | 26 52 51 N | 098 36 54 W |
| Mario Olga Colonia | Populated Place | 121 | Duval | 27 36 26 N | 098 24 55 W |
| Marion | Locale | 55 | Angelina | 31 23 59 N | 094 31 13 W |
| Marion | Populated Place | 196 | Guadalupe | 29 34 17 N | 098 08 25 W |
| Marion Baptist Church | Church | 198 | Guadalupe | 29 34 27 N | 098 08 41 W |
| Marion Career Academy | School | 196 | Guadalupe | 29 34 12 N | 098 08 17 W |
| Marion Cemetery | Cemetery | 458 | McCulloch | 31 23 57 N | 099 27 26 W |
| Marion County | Civil | 70 | Marion | 32 48 00 N | 094 21 01 W |
| Marion Ferry Park | Park | 59 | Angelina | 31 23 38 N | 094 31 39 W |