Voter Turnout and Results by County in the 2018 Texas Senatorial Election

The chart above shows the total votes, the turnout, and the margin of victory for each county in the state of Texas.  Beto O'Rourke won the five largest counties as indicated by the blue circles from the center to the right, but won them by such a small margin.  Ted Cruz, on the other hand, won the majority of small counties but with really large margins.  Ted Cruz won the counties with both the smallest and largest voter turnout.

Findings

• Cruz won 28 out of the 30 counties with the highest voter turnout.
• Conversely, O'Rourke won 15 out of the 30 counties with the lowest voter turnout.
• Out of the 254 counties in the state, 154 had a turnout of over 50 percent.
• O'Rourke won only eight of the 154 counties that had a turnout of over 50 percent.
• Only seven counties (out of 254) had more than two-thirds of their registered population vote, Cruz won all of these counties.

Caveats

• There may still be a few votes not counted.

Details

Although Cruz won the counties with the high turnout, O'Rourke won the most populous counties, taking eight out of the top ten.  However, O'Rourke's largest margin of victory was 59.06 percentage points whereas Cruz's was 91.74 percentage points.  Cruz won 106 counties with a higher margin of victory than O'Rourke's highest margin of victory.

Cruz won 24 of the 25 least populous counties.  He also won 24 of the 25 least populous counties where turnout was above 50 percent.

Data

County	Cruz	O'Rourke	Percent Difference
Anderson	11,315	3,287	54.63
Andrews	3,338	776	62.02
Angelina	19,153	7,123	45.52
Aransas	6,648	2,229	49.47
Archer	3,208	376	78.62
Armstrong	819	74	82.87
Atascosa	7,737	4,325	28.01
Austin	8,702	2,237	58.65
Bailey	1,202	405	49.38
Bandera	7,643	1,865	60.29
Bastrop	15,049	12,066	10.88
Baylor	1,070	156	74.01
Bee	4,341	2,809	21.24
Bell	47,279	38,191	10.54
Bexar	216,428	324,688	-19.82
Blanco	4,180	1,567	45.02
Borden	320	22	86.88
Bosque	5,699	1,365	60.81
Bowie	20,131	7,960	43.05
Brazoria	65,470	45,068	18.32
Brazos	35,724	27,642	12.63
Brewster	1,868	2,144	-6.78
Briscoe	563	69	77.92
Brooks	543	1,376	-43.32
Brown	10,386	1,669	71.89
Burleson	5,077	1,425	55.78
Burnet	13,791	4,417	50.96
Caldwell	6,131	5,212	8.03
Calhoun	4,198	1,874	37.98
Callahan	4,363	608	74.94
Cameron	28,508	48,656	-25.92
Camp	2,749	1,117	41.95
Carson	2,185	244	79.19
Cass	8,130	2,013	60.04
Castro	1,219	394	50.83
Chambers	12,134	2,921	60.76
Cherokee	11,621	3,200	56.43
Childress	1,525	234	73.06
Clay	3,708	547	73.75
Cochran	541	140	58.45
Coke	1,146	137	78.04
Coleman	2,758	351	77.02
Collin	186,625	164,852	6.14
Collingsworth	810	113	75.11
Colorado	3,565	1,020	55.36
Comal	43,918	16,748	44.36
Comanche	3,799	781	65.47
Concho	800	163	65.20
Cooke	6,168	1,457	61.43
Coryell	10,617	5,052	35.14
Cottle	458	97	64.81
Crane	836	213	59.05
Crockett	927	340	46.04
Crosby	978	436	38.14
Culberson	294	521	-27.15
Dallam	969	139	74.51
Dallas	240,128	478,289	-32.91
Dawson	2,240	874	43.74
Deaf Smith	2,677	1,065	42.76
Delta	1,561	354	62.51
Denton	158,509	134,295	8.20
Dewitt	4,974	1,128	62.73
Dickens	635	113	69.23
Dimmit	839	2,041	-41.56
Donley	1,109	411	45.68
Duval	1,328	2,765	-34.95
Eastland	5,373	796	73.86
Ector	20,958	9,209	38.63
Edwards	603	145	60.58
Ellis	40,979	19,061	36.23
El Paso	50,288	149,457	-49.36
Erath	10,039	2,482	59.96
Falls	3,201	1,440	37.79
Fannin	8,558	2,105	60.10
Fayette	8,218	2,192	57.59
Fisher	1,139	340	53.48
Floyd	1,310	463	47.53
Foard	321	113	47.82
Fort Bend	111,190	141,846	-12.04
Franklin	3,290	639	66.88
Freestone	1,608	401	60.08
Frio	1,628	2,001	-10.20
Gaines	3,317	513	72.85
Galveston	66,436	43,858	20.30
Garza	1,068	201	67.47
Gillespie	9,872	2,560	58.44
Glasscock	513	37	85.92
Goliad	2,324	716	52.39
Gonzales	4,171	1,421	48.91
Gray	5,240	613	78.52
Grayson	31,572	11,130	47.50
Gregg	24,457	11,027	37.60
Grimes	6,490	2,034	51.85
Guadalupe	33,881	20,006	25.49
Hale	5,349	1,964	45.90
Hall	807	161	66.53
Hamilton	2,606	456	69.62
Hansford	1,552	138	82.69
Hardeman	973	185	67.81
Hardin	17,373	2,634	73.41
Harris	495,951	692,861	-16.44
Harrison	16,190	6,205	44.35
Hartley	1,467	153	80.91
Haskell	1,360	302	63.28
Hays	33,169	45,355	-15.35
Hemphill	1,201	156	76.50
Henderson	20,865	5,406	58.39
Hidalgo	46,437	104,234	-38.15
Hill	8,911	2,433	56.79
Hockley	4,843	1,208	59.69
Hood	20,073	4,714	61.48
Hopkins	9,298	2,542	56.73
Houston	3,478	1,062	52.94
Howard	5,645	1,690	53.49
Hudspeth	506	404	10.99
Hunt	21,094	7,142	49.03
Hutchinson	5,851	750	76.87
Irion	634	95	73.33
Jack	2,497	295	78.34
Jackson	3,908	831	64.70
Jasper	9,475	2,275	61.03
Jeff Davis	683	465	18.54
Jefferson	36,694	37,059	-0.49
Jim Hogg	409	1,060	-44.08
Jim Wells	4,512	5,321	-8.19
Johnson	39,541	12,395	51.82
Jones	4,107	830	65.88
Karnes	2,894	1,200	41.05
Kaufman	26,095	12,017	36.66
Kendall	15,274	4,327	55.39
Kenedy	100	77	12.78
Kent	288	44	72.40
Kerr	16,780	5,170	52.45
Kimble	1,493	195	76.26
King	124	6	90.08
Kinney	827	358	39.12
Kleberg	4,073	4,436	-4.24
Knox	855	229	57.27
Lamar	12,688	3,715	54.29
Lamb	3,044	773	59.28
Lampasas	5,814	1,561	57.16
Lasalle	673	813	-9.40
Lavaca	6,688	1,018	73.29
Lee	4,475	1,318	54.15
Leon	5,709	854	73.72
Liberty	16,013	4,402	56.56
Limestone	5,193	1,666	51.18
Lipscomb	941	116	77.39
Live Oak	2,135	459	64.29
Llano	7,885	2,111	57.34
Loving	46	6	75.47
Lubbock	58,709	31,976	29.24
Lynn	1,368	323	61.62
Madison	3,032	778	58.88
Marion	2,443	1,012	41.05
Martin	1,297	243	67.82
Mason	1,560	402	58.87
Matagorda	7,326	3,042	41.01
Maverick	2,950	7,724	-44.32
Mcculloch	2,244	400	69.06
Mclennan	45,836	28,426	23.27
Mcmullen	387	41	80.47
Medina	11,434	4,613	42.21
Menard	629	144	62.26
Midland	31,167	9,085	54.39
Milam	5,905	1,981	49.33
Mills	1,763	229	76.59
Mitchell	1,584	323	65.95
Montague	6,422	940	73.90
Montgomery	137,231	51,124	45.37
Moore	3,244	786	60.62
Morris	3,063	1,320	39.60
Motley	483	41	83.71
Nacogdoches	13,766	7,721	27.97
Navarro	10,383	3,913	44.92
Newton	3,660	993	57.04
Nolan	3,116	927	53.80
Nueces	45,875	47,265	-1.48
Ochiltree	2,158	229	79.98
Oldham	732	82	79.66
Orange	21,156	5,045	61.22
Palo Pinto	7,490	1,817	60.65
Panola	7,120	1,598	63.12
Parker	43,994	9,926	62.64
Parmer	1,674	372	63.33
Pecos	2,157	1,336	23.37
Polk	12,735	3,827	53.44
Potter	16,630	7,494	37.54
Presidio	406	1,172	-48.24
Rains	3,424	587	70.36
Randall	37,767	9,324	59.95
Reagan	692	136	66.67
Real	1,311	245	68.16
Red River	3,421	973	55.49
Reeves	1,125	1,252	-5.31
Refugio	1,636	846	31.71
Roberts	441	19	91.74
Robertson	4,292	1,942	37.51
Rockwall	26,590	11,713	38.51
Runnels	2,842	385	75.62
Rusk	12,595	3,609	55.20
Sabine	3,442	495	74.57
San Augustine	2,260	734	50.70
San Jacinto	7,487	1,781	61.20
San Patricio	11,322	6,755	25.12
San Saba	1,811	247	75.59
Schleicher	735	209	55.25
Scurry	3,702	641	70.22
Shackelford	1,174	103	83.61
Shelby	6,005	1,521	59.33
Sherman	691	86	73.78
Smith	53,542	23,036	39.60
Somervell	3,032	633	65.01
Starr	2,436	8,246	-54.05
Stephens	2,627	324	77.70
Sterling	442	44	81.89
Stonewall	497	112	62.70
Sutton	933	265	55.44
Swisher	1,459	420	54.89
Tarrant	308,608	312,477	-0.62
Taylor	29,751	10,445	47.61
Terrell	323	138	39.70
Terry	2,169	627	54.86
Throckmorton	617	77	76.81
Titus	5,654	2,258	42.64
Tom Green	24,568	9,624	43.34
Travis	118,603	356,971	-49.59
Trinity	4,146	998	60.83
Tyler	5,874	1,176	66.31
Upshur	11,517	2,361	65.55
Upton	854	168	66.60
Uvalde	4,343	3,510	10.53
Val Verde	5,290	5,909	-5.48
Van Zandt	15,181	2,631	70
Victoria	18,994	8,039	40.29
Walker	11,517	6,163	30.06
Waller	10,145	6,317	23.11
Ward	2,092	799	44.36
Washington	10,130	3,254	51.01
Webb	13,813	35,142	-43.21
Wharton	9,092	3,788	41.01
Wheeler	1,679	125	85.86
Wichita	23,617	9,948	40.37
Wilbarger	2,638	776	54.16
Willacy	1,527	2,773	-28.81
Williamson	98,658	104,262	-2.73
Wilson	13,021	4,563	47.76
Winkler	1,123	321	55.12
Wise	19,010	3,913	65.35
Wood	13,944	2,620	67.88
Yoakum	1,558	335	64.27
Young	5,531	818	73.76
Zapata	820	1,389	-25.64
Zavala	589	2,310	-59.06

Sources

Texas Office of the Secretary of State.  "2018 General Election: Election Night Results."  Accessed November 7, 2018. https://enrpages.sos.state.tx.us/public/nov06_331_race0.htm.