Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| San Carlos Number 1 Colonia | Populated Place | 165 | Webb | 27 29 25 N | 099 22 24 W |
| San Carlos Number 2 Colonia | Populated Place | 165 | Webb | 27 29 25 N | 099 22 06 W |
| San Carlos Windmill | Locale | 21 | Hidalgo | 26 38 08 N | 098 05 19 W |
| San Carlos Windmill | Locale | 167 | Jim Hogg | 26 50 33 N | 098 44 19 W |
| San Carlos Windmill | Locale | 125 | Jim Hogg | 26 58 50 N | 098 34 44 W |
| San Casimiro Creek | Stream | | Webb | 28 05 27 N | 098 54 16 W |
| San Christoval Creek | Stream | | Karnes | 28 45 26 N | 098 03 24 W |
| San Cirilo Creek | Stream | | Webb | 27 58 49 N | 099 55 51 W |
| San Cristobal Windmill | Locale | 69 | Brooks | 27 01 17 N | 098 18 34 W |
| San Diego | Populated Place | 94 | Duval | 27 45 50 N | 098 14 20 W |
| San Diego Creek | Stream | | Jim Wells | 27 46 31 N | 098 02 24 W |
| San Diego High School | School | 98 | Duval | 27 45 19 N | 098 14 42 W |
| San Diego Oil Field | Oilfield | 113 | Jim Wells | 27 52 02 N | 098 14 08 W |
| San Diego Park | Park | 14 | Nueces | 27 45 59 N | 097 25 17 W |
| San Domingo Creek | Stream | | Bee | 28 31 11 N | 097 47 02 W |
| San Domingo Oil Field | Oilfield | 104 | Bee | 28 31 04 N | 097 51 24 W |
| San Domingo Ranch | Locale | 96 | Bee | 28 30 47 N | 097 47 13 W |
| San Eduardo Windmills | Locale | 164 | Starr | 26 45 35 N | 098 46 37 W |
| San Elizario | Populated Place | 1110 | El Paso | 31 35 06 N | 106 16 22 W |
| San Elizario Alternative Center | School | 1111 | El Paso | 31 35 24 N | 106 16 23 W |
| San Elizario Elementary School | School | 1111 | El Paso | 31 35 14 N | 106 16 22 W |
| San Elizario Historic District | Locale | 1111 | El Paso | 31 35 08 N | 106 16 35 W |
| San Elizario Island | Island | 1098 | El Paso | 31 28 34 N | 106 10 03 W |
| San Elizario Lateral | Canal | 1111 | El Paso | 31 35 58 N | 106 16 50 W |
| San Elizario Middle School | School | 1111 | El Paso | 31 35 25 N | 106 16 23 W |
| San Estaban Lake | Reservoir | 1352 | Presidio | 30 09 60 N | 104 01 43 W |
| San Esteban Lake Dam | Dam | 1349 | Presidio | 30 10 01 N | 104 01 44 W |
| San Esteban Lutheran Church | Church | 198 | Bexar | 29 22 38 N | 098 31 58 W |
| San Felipe | Populated Place | 47 | Austin | 29 47 35 N | 096 06 03 W |
| San Felipe Arroyo | Valley | | El Paso | 31 30 30 N | 106 08 57 W |
| San Felipe Cemetery | Cemetery | 285 | Val Verde | 29 20 57 N | 100 52 49 W |
| San Felipe Country Club | Locale | 299 | Val Verde | 29 22 16 N | 100 52 54 W |
| San Felipe Courts Historic District | Locale | 14 | Harris | 29 45 35 N | 095 22 45 W |
| San Felipe Creek | Stream | | Val Verde | 29 19 35 N | 100 55 09 W |
| San Felipe Middle School | School | 294 | Val Verde | 29 21 32 N | 100 52 54 W |
| San Felipe Oil Field | Oilfield | 36 | Waller | 29 46 39 N | 096 01 37 W |
| San Felipe Ranch | Locale | 21 | Hidalgo | 26 36 49 N | 098 06 51 W |
| San Felipe School | School | 293 | Val Verde | 29 21 29 N | 100 52 53 W |
| San Felipe Siding | Locale | 47 | Austin | 29 46 42 N | 096 06 30 W |
| San Felipe Springs | Spring | 294 | Val Verde | 29 22 24 N | 100 52 58 W |
| San Felipe Windmill | Locale | 184 | Jim Hogg | 26 53 31 N | 098 43 17 W |
| San Felipe Windmill | Locale | 156 | Starr | 26 37 50 N | 098 43 43 W |
| San Fernando Cemetery Number 1 | Cemetery | 195 | Bexar | 29 24 55 N | 098 30 40 W |
| San Fernando Cemetery Number 2 | Cemetery | 206 | Bexar | 29 24 54 N | 098 33 04 W |
| San Fernando Colonia | Populated Place | 79 | Starr | 26 24 19 N | 098 50 11 W |
| San Fernando Creek | Stream | | Kleberg | 27 22 46 N | 097 42 26 W |
| San Fernando Creek | Stream | | Llano | 30 44 51 N | 098 45 39 W |
| San Fernando Windmill | Locale | 141 | McMullen | 28 37 18 N | 098 47 22 W |
| San Francisco | Populated Place | 544 | Brewster | 29 53 37 N | 102 24 15 W |
| San Francisco Artesian Well | Well | 4 | Kenedy | 26 47 40 N | 097 39 22 W |
| San Francisco Banco Number 60 | Levee | 43 | Starr | 26 17 36 N | 098 41 34 W |
| San Francisco Catholic Church | Church | 186 | Travis | 30 07 11 N | 097 41 44 W |
| San Francisco Cemeteries | Cemetery | 17 | Cameron | 26 09 37 N | 097 50 25 W |
| San Francisco Church | Church | 187 | Travis | 30 07 11 N | 097 41 40 W |
| San Francisco Creek | Stream | | Terrell | 29 52 49 N | 102 19 20 W |
| San Francisco Crossing | Locale | 485 | Brewster | 29 51 48 N | 102 19 49 W |
| San Francisco Perez Creek | Stream | | Medina | 29 05 14 N | 098 55 47 W |
| San Francisco Ranch | Locale | 6 | Kenedy | 26 36 12 N | 097 37 21 W |
| San Francisco Shutups | Valley | | Brewster | 29 55 14 N | 102 38 55 W |
| San Francisco Well | Well | 5 | Willacy | 26 27 21 N | 097 32 33 W |
| San Francisco Windmill | Locale | | Brewster | 30 08 30 N | 103 03 51 W |
| San Francisco Windmill | Locale | 163 | Jim Hogg | 27 07 49 N | 098 41 30 W |
| San Francisco Windmill | Locale | 5 | Kenedy | 26 53 00 N | 097 39 31 W |
| San Gabriel | Populated Place | 126 | Milam | 30 41 40 N | 097 11 46 W |
| San Gabriel Park | Park | 208 | Williamson | 30 39 10 N | 097 40 11 W |
| San Gabriel River | Stream | | Milam | 30 45 38 N | 097 00 52 W |
| San Gabriel River Ranch Lake | Reservoir | 272 | Williamson | 30 43 07 N | 097 54 25 W |
| San Gabriel River Ranch Lake Dam | Dam | 272 | Williamson | 30 43 07 N | 097 54 25 W |
| San Gabriel Wildlife Area | Park | 160 | Williamson | 30 40 47 N | 097 23 17 W |
| San Geronimo | Populated Place | 383 | Bexar | 29 37 23 N | 098 47 38 W |
| San Geronimo Airpark | Airport | 310 | Bexar | 29 30 38 N | 098 47 55 W |
| San Geronimo Cemetery | Cemetery | 159 | Guadalupe | 29 34 24 N | 097 56 12 W |
| San Geronimo Creek | Stream | | Medina | 29 25 24 N | 098 53 31 W |
| San Geronimo Recharge Dam | Dam | 309 | Medina | 29 32 07 N | 098 48 25 W |
| San Geronimo Recharge Lake | Reservoir | 310 | Medina | 29 32 07 N | 098 48 25 W |
| San Grabiel Cemetery | Cemetery | 24 | Fort Bend | 29 34 28 N | 095 45 17 W |
| San Guadalupe Windmill | Locale | 124 | Jim Hogg | 26 53 57 N | 098 34 44 W |
| San Guillermo Church | Church | 63 | Hidalgo | 26 16 54 N | 098 33 45 W |
| San Houston School | School | 893 | Ector | 31 52 40 N | 102 22 49 W |
| San Idelfonso Creek | Stream | | Webb | 27 24 36 N | 099 29 13 W |
| San Idelfonso Tank | Reservoir | 109 | Starr | 26 37 29 N | 098 48 06 W |
| San Ignacio Artesian Well | Well | 6 | Kenedy | 26 49 56 N | 097 42 24 W |
| San Ignacio de Loyola Church | Church | 46 | Starr | 26 18 56 N | 098 41 38 W |
| San Ignacio Viejo Unit 2 Colonia | Populated Place | 102 | Zapata | 27 01 02 N | 099 24 26 W |
| San Ignacio Windmill | Locale | 53 | Hidalgo | 26 36 40 N | 098 18 01 W |
| San Ignacio Windmill Number One | Locale | 154 | Starr | 26 37 24 N | 098 41 23 W |
| San Ignacio Windmill Number Two | Locale | 148 | Starr | 26 36 11 N | 098 41 45 W |
| San Isidro | Populated Place | 86 | Starr | 26 43 00 N | 098 27 14 W |
| San Isidro Cemetery | Cemetery | 204 | Bexar | 29 19 07 N | 098 43 08 W |
| San Isidro Cemetery | Cemetery | 139 | Duval | 27 37 54 N | 098 30 25 W |
| San Jacino Park | Park | 889 | Ector | 31 51 26 N | 102 23 36 W |
| San Jacinto | Populated Place | 101 | Walker | 30 37 20 N | 095 43 16 W |
| San Jacinto Assembly of God Church | Church | 1116 | Potter | 35 13 15 N | 101 51 59 W |
| San Jacinto Baptist Church | Church | 9 | Harris | 29 41 05 N | 095 07 27 W |
| San Jacinto Baptist Church | Church | 1106 | Potter | 35 13 10 N | 101 54 35 W |
| San Jacinto Church | Church | 9 | Harris | 29 41 04 N | 095 07 26 W |
| San Jacinto College | School | 9 | Harris | 29 39 41 N | 095 06 51 W |
| San Jacinto College Central Soccer Stadium and Track | Park | 8 | Harris | 29 39 27 N | 095 06 50 W |
| San Jacinto College North Baseball Field | Park | 11 | Harris | 29 48 51 N | 095 10 54 W |
| San Jacinto College North Gymnasium | Building | 11 | Harris | 29 48 42 N | 095 10 51 W |
| San Jacinto College South Baseball Field | Park | 11 | Harris | 29 34 60 N | 095 12 18 W |
| San Jacinto Community Church | Church | 1115 | Potter | 35 12 36 N | 101 51 50 W |
| San Jacinto County | Civil | 80 | San Jacinto | 30 34 01 N | 095 10 01 W |
| San Jacinto County Jail | Building | 100 | San Jacinto | 30 34 36 N | 095 07 37 W |
| San Jacinto Dam | Dam | 5 | Harris | 29 55 05 N | 095 08 10 W |
| San Jacinto Elementary School | School | 161 | Dallas | 32 45 29 N | 096 41 09 W |
| San Jacinto Elementary School | School | 889 | Ector | 31 51 23 N | 102 23 25 W |
| San Jacinto Elementary School | School | 2 | Galveston | 29 17 60 N | 094 47 22 W |
| San Jacinto Elementary School | School | 5 | Harris | 29 43 33 N | 095 00 06 W |
| San Jacinto Elementary School | School | 8 | Harris | 29 42 19 N | 095 07 09 W |