Texas's 31st Senate district
District 31 of the Texas Senate is a senatorial district that currently serves Andrews, Armstrong, Bailey, Borden, Briscoe, Carson, Castro, Cochran, Coke, Crane, Dallam, Dawson, Deaf Smith, Ector, Gaines, Glasscock, Hall, Hansford, Hartley, Hemphill, Howard, Hutchinson, Irion, Lipscomb, Loving, Martin, Midland, Mitchell, Moore, Ochiltree, Oldham, Parmer, Potter, Randall, Reagan, Roberts, Schleicher, Scurry, Sherman, Sterling, Swisher, Upton, Ward, Winkler, Yoakum counties in the U.S. state of Texas.
The current senator from District 31 is Kevin Sparks.
Biggest cities in the district
District 31 has a population of 793,600 with 573,847 that is at voting age from the 2010 census.| Name | County | Pop. | |
| 1 | Amarillo | Potter/Randall | 190,695 |
| 2 | Midland | Martin/Midland | 111,147 |
| 3 | Odessa | Ector/Midland | 99,940 |
| 4 | Big Spring | Howard | 27,282 |
| 5 | Pampa | Gray | 17,994 |