Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Second Chapel Baptist Church | Church | 164 | Dallas | 32 53 59 N | 096 37 20 W |
| Second Christian Church | Church | 2 | Galveston | 29 17 50 N | 094 47 52 W |
| Second Church | Church | 7 | Brazoria | 29 08 29 N | 095 25 25 W |
| Second Church | Church | 152 | Dallas | 32 45 38 N | 096 51 01 W |
| Second Church of Christ | Church | 14 | Harris | 29 39 55 N | 095 21 25 W |
| Second Church of Christ Scientist | Church | 231 | Bexar | 29 27 17 N | 098 29 50 W |
| Second Coffee Hollow | Valley | | Kendall | 29 58 36 N | 098 47 34 W |
| Second Corinth | Populated Place | 61 | Waller | 30 08 36 N | 096 07 03 W |
| Second Corinth Baptist Church | Church | 13 | Harris | 29 44 05 N | 095 21 49 W |
| Second Corinth Church | Church | 63 | Waller | 30 08 40 N | 096 07 30 W |
| Second Creek | Stream | | Kerr | 30 00 51 N | 099 06 32 W |
| Second Creek | Stream | | Lipscomb | 36 15 15 N | 100 26 00 W |
| Second Creek | Stream | | Medina | 29 22 34 N | 099 03 42 W |
| Second Creek | Stream | | Polk | 30 32 50 N | 094 50 41 W |
| Second Crossing | Populated Place | 205 | Comal | 29 46 44 N | 098 09 37 W |
| Second Crossing | Populated Place | 383 | Uvalde | 29 30 55 N | 099 41 50 W |
| Second Davidson Creek | Stream | | Burleson | 30 27 51 N | 096 39 29 W |
| Second Division Hill | Summit | 372 | Bexar | 29 38 41 N | 098 35 07 W |
| Second Donna Apostolic Church | Church | 26 | Hidalgo | 26 10 05 N | 098 02 17 W |
| Second Missionary Baptist Church | Church | 14 | Harris | 29 40 15 N | 095 22 06 W |
| Second Missionary Baptist Church | Church | 122 | McLennan | 31 33 04 N | 097 07 09 W |
| Second Mount Carmel Baptist Church | Church | 31 | Fort Bend | 29 35 05 N | 095 46 29 W |
| Second Mount Olive Baptist Church | Church | 14 | Harris | 29 47 04 N | 095 18 54 W |
| Second Old River | Stream | 51 | Harrison | 32 43 17 N | 094 13 45 W |
| Second Pleasant Grove Baptist Church | Church | 12 | Harris | 29 43 43 N | 095 21 18 W |
| Second Pond | Swamp | 33 | Liberty | 30 10 30 N | 095 04 53 W |
| Second Presbyterian Church | Church | 163 | Caldwell | 29 52 42 N | 097 40 28 W |
| Second Presbyterian Church | Church | 12 | Cameron | 26 11 00 N | 097 42 16 W |
| Second Rancho Chico Additio Colonia | Populated Place | 15 | San Patricio | 28 01 31 N | 097 29 54 W |
| Second Roosevelt Colonia | Populated Place | 16 | San Patricio | 27 58 17 N | 097 24 05 W |
| Second Shiloh Baptist Church | Church | 15 | Harris | 29 41 05 N | 095 22 16 W |
| Second Trinity University Campus | School | 191 | Ellis | 32 24 19 N | 096 51 15 W |
| Second Water Canyon | Valley | | Jeff Davis | 30 45 15 N | 103 51 35 W |
| Second Weches School (historical) | School | 134 | Houston | 31 32 30 N | 095 13 54 W |
| Second West Prong Windmill | Locale | 1038 | Oldham | 35 27 10 N | 102 28 21 W |
| Secondary Reassign Center | School | 164 | Dallas | 32 49 42 N | 096 59 28 W |
| Secondary Reservoir | Reservoir | 306 | Wichita | 33 51 07 N | 098 33 43 W |
| Secondary Reservoir Levee | Dam | 300 | Wichita | 33 51 12 N | 098 33 43 W |
| Section and a Half Windmill | Locale | 818 | Glasscock | 31 46 48 N | 101 41 57 W |
| Section Creek | Stream | | Washington | 30 09 38 N | 096 33 42 W |
| Section Pond | Swamp | 38 | Montgomery | 30 14 34 N | 095 09 17 W |
| Section Seven Windmill | Locale | 639 | Motley | 33 51 00 N | 100 31 17 W |
| Section Tank | Reservoir | 905 | Reeves | 31 34 12 N | 103 46 12 W |
| Section Tank | Reservoir | 473 | San Saba | 31 05 24 N | 098 44 29 W |
| Section Three Windmill | Locale | 935 | Pecos | 30 56 33 N | 103 18 59 W |
| Section Two Windmill | Locale | 635 | Motley | 34 03 35 N | 100 40 40 W |
| Section Windmill | Locale | 641 | Gillespie | 30 23 32 N | 099 16 52 W |
| Security | Populated Place | 49 | Montgomery | 30 19 41 N | 095 14 22 W |
| Security Calvery Baptist Church | Church | 49 | Montgomery | 30 18 52 N | 095 14 26 W |
| Security Cemetery | Cemetery | 49 | Montgomery | 30 19 07 N | 095 13 60 W |
| Security First Baptist Church | Church | 50 | Montgomery | 30 19 40 N | 095 14 07 W |
| Security Siding | Locale | 49 | Montgomery | 30 18 42 N | 095 14 40 W |
| Sedalia | Populated Place | 219 | Collin | 33 23 46 N | 096 28 41 W |
| Sedalia Church | Church | 219 | Collin | 33 23 47 N | 096 28 39 W |
| Sedberry Hollow | Valley | | Real | 29 39 09 N | 099 48 40 W |
| Sedberry House | Building | 63 | Marion | 32 45 25 N | 094 20 52 W |
| Sediment Control Structure 112 Reservoir | Reservoir | 308 | Montague | 33 32 06 N | 097 30 55 W |
| Sediment Control Structure 2-9 Reservoir | Reservoir | 304 | Montague | 33 35 24 N | 097 42 37 W |
| Sediment Control Structure 7-6 Reservoir | Reservoir | 295 | Montague | 33 30 12 N | 097 36 01 W |
| Sedwick | Populated Place | 421 | Shackelford | 32 36 11 N | 099 12 16 W |
| Seed Tick Hollow | Valley | | Real | 29 41 10 N | 099 53 40 W |
| Seekatz Cove | Bay | 324 | Medina | 29 33 16 N | 098 56 05 W |
| Seekeks Lake | Lake | 84 | Washington | 30 11 30 N | 096 23 21 W |
| Seelbach Branch | Stream | | Nacogdoches | 31 47 17 N | 094 43 10 W |
| Seele Elementary School | School | 195 | Comal | 29 42 29 N | 098 08 27 W |
| Seele School | School | 194 | Comal | 29 42 29 N | 098 08 23 W |
| Seeligson | Populated Place | 46 | Jim Wells | 27 24 33 N | 098 06 57 W |
| Seeligson Oil Field | Oilfield | 47 | Jim Wells | 27 23 00 N | 098 07 43 W |
| Seeligson Ranch | Locale | 50 | Jim Wells | 27 24 43 N | 098 08 35 W |
| Seeligson Ranch Airport | Airport | 51 | Jim Wells | 27 24 17 N | 098 08 42 W |
| Seeling Park | Park | 230 | Bexar | 29 33 05 N | 098 27 39 W |
| Seeny Lake | Lake | 70 | Gonzales | 29 15 34 N | 097 33 17 W |
| Seep Canyon | Valley | | Randall | 34 59 32 N | 101 40 49 W |
| Seep Canyon | Valley | | Val Verde | 29 47 52 N | 101 32 02 W |
| Seep Draw | Valley | | Irion | 31 09 35 N | 100 55 04 W |
| Seep Spring | Spring | 972 | Presidio | 29 20 34 N | 103 59 23 W |
| Seep Spring | Spring | 1159 | Presidio | 29 26 45 N | 103 52 27 W |
| Seep Spring Draw | Valley | | Culberson | 31 40 05 N | 104 40 30 W |
| Seep Spring Mountain | Summit | 674 | Edwards | 29 51 33 N | 100 02 54 W |
| Seep Spring Tank | Reservoir | 1534 | Culberson | 31 40 38 N | 104 42 13 W |
| Seep Springs | Spring | 432 | Val Verde | 29 49 25 N | 101 30 43 W |
| Seep Springs Hollow | Valley | | Bandera | 29 42 45 N | 099 33 17 W |
| Seep Tank | Reservoir | 1376 | Culberson | 31 57 18 N | 104 39 24 W |
| Seep Well | Well | 926 | Reeves | 31 26 17 N | 103 53 24 W |
| Seeping Springs Windmill | Locale | 915 | Loving | 31 56 55 N | 103 20 22 W |
| Seepy Tank | Reservoir | 775 | Borden | 32 40 42 N | 101 36 42 W |
| Seger | Populated Place | 111 | Robertson | 30 55 17 N | 096 37 24 W |
| Segler Lake | Reservoir | 152 | Caldwell | 29 55 31 N | 097 37 31 W |
| Segler Lake Dam | Dam | 152 | Caldwell | 29 55 31 N | 097 37 31 W |
| Segno | Populated Place | 63 | Polk | 30 34 38 N | 094 41 11 W |
| Segno Oil Field | Oilfield | 47 | Polk | 30 31 02 N | 094 35 19 W |
| Segovia | Populated Place | 546 | Kimble | 30 25 10 N | 099 40 13 W |
| Segrado Carazon Windmill | Locale | 22 | Hidalgo | 26 28 35 N | 098 08 39 W |
| Seguin | Populated Place | 159 | Guadalupe | 29 34 08 N | 097 57 53 W |
| Seguin Branch | Stream | | Wilson | 29 08 09 N | 098 10 47 W |
| Seguin Commercial Historic District | Locale | 160 | Guadalupe | 29 33 60 N | 097 57 55 W |
| Seguin Elementary School | School | 36 | Hidalgo | 26 13 38 N | 098 14 55 W |
| Seguin Elementary School | School | 37 | Hidalgo | 26 13 38 N | 098 15 01 W |
| Seguin High School | School | 163 | Guadalupe | 29 34 35 N | 097 56 54 W |
| Segunda Iglesia Apostolica de la Fe en Cristo Jesus Church | Church | 1113 | El Paso | 31 36 52 N | 106 16 59 W |
| Segunda Iglesia Bautista Church | Church | 157 | Dallas | 32 44 30 N | 097 00 11 W |
| Segunda Iglesia Bautista Church | Church | 291 | Val Verde | 29 21 29 N | 100 53 11 W |
| Segunda Iglesia Bautista Mexicana Church | Church | 215 | Bexar | 29 28 11 N | 098 30 41 W |
| Segunda Tank | Reservoir | 1352 | Culberson | 31 24 07 N | 104 30 03 W |
| Segura-Saenz Cemetery | Cemetery | 102 | Duval | 27 38 02 N | 098 19 10 W |
| Seidel Ranch Airport | Airport | 161 | Travis | 30 08 52 N | 097 39 47 W |
| Seiders Spring | Spring | 181 | Travis | 30 18 21 N | 097 44 50 W |
| Sejita | Populated Place | 110 | Duval | 27 18 13 N | 098 26 23 W |
| Sejita Oil Field | Oilfield | 110 | Duval | 27 19 31 N | 098 24 41 W |
| Selden | Populated Place | 386 | Erath | 32 08 39 N | 098 06 24 W |