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.

[1] The current senator from District 31 is Kevin Sparks.

District 31 has a population of 793,600 with 573,847 that is at voting age from the 2010 census.

[2] Election history of District 31 from 1992.

[b] Kevin Sparks (Republican) was unopposed; as such, the election was cancelled and Sparks was declared elected without a vote.