(a) For purposes of this chapter, the state is divided into five districts, each of which is composed as provided by this section.
(b) State District No. 1 is composed of the following 51 counties: Dallam, Dawson, Sherman, Hansford, Ochiltree, Lipscomb, Hartley, Moore, Hutchinson, Roberts, Hemphill, Oldham, Potter, Carson, Gray, Wheeler, Deaf Smith, Randall, Armstrong, Donley, Collingsworth, Parmer, Castro, Swisher, Briscoe, Hall, Childress, Bailey, Lamb, Hale, Floyd, Motley, Cottle, Hardeman, Cochran, Hockley, Lubbock, Crosby, Dickens, King, Yoakum, Terry, Lynn, Garza, Kent, Stonewall, Gaines, Borden, Scurry, Fisher, and Foard.

(c) State District No. 2 is composed of the following 51 counties: Andrews, Martin, Howard, Mitchell, Nolan, Taylor, Runnels, Coke, Sterling, Glasscock, Midland, Ector, Winkler, Loving, Reeves, Culberson, Hudspeth, El Paso, Jeff Davis, Presidio, Brewster, Pecos, Terrell, Ward, Crane, Upton, Reagan, Irion, Tom Green, Concho, McCulloch, San Saba, Mason, Llano, Blanco, Gillespie, Crockett, Schleicher, Menard, Sutton, Kimble, Val Verde, Edwards, Real, Kerr, Kendall, Bandera, Uvalde, Medina, Kinney, and Maverick.
(d) State District No. 3 is composed of the following 50 counties: Burleson, Lee, Bastrop, Travis, Hays, Comal, Guadalupe, Caldwell, Fayette, Washington, Austin, Colorado, Lavaca, Gonzales, Wilson, Bexar, DeWitt, Jackson, Wharton, Fort Bend, Brazoria, Matagorda, Calhoun, Refugio, Bee, Karnes, Live Oak, Atascosa, McMullen, LaSalle, Frio, Duval, Dimmit, Webb, Zapata, Jim Hogg, Starr, Brooks, Hidalgo, Cameron, Willacy, Kenedy, Kleberg, Nueces, San Patricio, Aransas, Jim Wells, Zavala, Goliad, and Victoria.
(e) State District No. 4 is composed of the following 51 counties: Lamar, Red River, Bowie, Delta, Hopkins, Franklin, Titus, Morris, Cass, Marion, Camp, Upshur, Wood, Rains, Van Zandt, Smith, Gregg, Harrison, Henderson, Cherokee, Rusk, Panola, Shelby, Nacogdoches, Anderson, Freestone, Leon, Robertson, Brazos, Madison, Grimes, Waller, Houston, Walker, Trinity, Angelina, San Augustine, Sabine, Newton, Jasper, Tyler, Polk, San Jacinto, Montgomery, Harris, Liberty, Hardin, Orange, Jefferson, Chambers, and Galveston.
(f) State District No. 5 is composed of the following 51 counties: Wilbarger, Wichita, Clay, Montague, Cooke, Grayson, Fannin, Hunt, Collin, Denton, Wise, Jack, Archer, Baylor, Knox, Haskell, Stephens, Throckmorton, Young, Jones, Shackelford, Palo Pinto, Rockwall, Kaufman, Ellis, Parker, Tarrant, Dallas, Johnson, Hood, Somervell, Erath, Eastland, Callahan, Coleman, Brown, Comanche, Mills, Hamilton, Bosque, Hill, Navarro, Limestone, McLennan, Falls, Milam, Bell, Williamson, Burnet, Lampasas, and Coryell.