| Anderson County |
2 |
| Angelina County |
3 |
| Aransas County |
2 |
| Archer County |
15 |
| Armstrong County |
15 |
| Atascosa County |
1 |
| Austin County |
2 |
| Bandera County |
1 |
| Bastrop County |
3 |
| Baylor County |
3 |
| Bee County |
4 |
| Bell County |
7 |
| Bexar County |
7 |
| Blanco County |
2 |
| Bosque County |
4 |
| Bowie County |
3 |
| Brazoria County |
1 |
| Brazos County |
2 |
| Briscoe County |
11 |
| Brooks County |
2 |
| Brown County |
12 |
| Burleson County |
1 |
| Burnet County |
10 |
| Caldwell County |
6 |
| Callahan County |
12 |
| Cameron County |
4 |
| Carson County |
7 |
| Cass County |
1 |
| Castro County |
15 |
| Chambers County |
7 |
| Cherokee County |
2 |
| Childress County |
2 |
| Clay County |
10 |
| Coke County |
5 |
| Coleman County |
2 |
| Collin County |
18 |
| Collingsworth County |
2 |
| Comal County |
2 |
| Comanche County |
13 |
| Concho County |
1 |
| Cooke County |
17 |
| Coryell County |
10 |
| Cottle County |
4 |
| Crosby County |
5 |
| Dallam County |
10 |
| Dallas County |
24 |
| Dawson County |
7 |
| Deaf Smith County |
17 |
| Delta County |
1 |
| Denton County |
68 |
| Dickens County |
4 |
|
| Donley County |
4 |
| Duval County |
4 |
| Eastland County |
19 |
| Ector County |
2 |
| Edwards County |
3 |
| Ellis County |
20 |
| Erath County |
34 |
| Falls County |
2 |
| Fannin County |
2 |
| Fayette County |
3 |
| Fisher County |
5 |
| Floyd County |
9 |
| Fort Bend County |
5 |
| Franklin County |
1 |
| Freestone County |
1 |
| Frio County |
2 |
| Galveston County |
7 |
| Garza County |
3 |
| Gillespie County |
1 |
| Glasscock County |
1 |
| Goliad County |
1 |
| Gonzales County |
3 |
| Gray County |
11 |
| Grayson County |
8 |
| Grimes County |
1 |
| Guadalupe County |
2 |
| Hale County |
13 |
| Hall County |
5 |
| Hamilton County |
10 |
| Hansford County |
11 |
| Hardeman County |
3 |
| Hardin County |
8 |
| Harris County |
45 |
| Hartley County |
7 |
| Haskell County |
7 |
| Hays County |
5 |
| Hemphill County |
2 |
| Henderson County |
5 |
| Hill County |
5 |
| Hockley County |
14 |
| Hood County |
27 |
| Houston County |
1 |
| Howard County |
1 |
| Hunt County |
15 |
| Hutchinson County |
7 |
| Jack County |
5 |
| Jasper County |
2 |
| Jefferson County |
8 |
| Jim Wells County |
5 |
| Johnson County |
30 |
|
| Jones County |
21 |
| Karnes County |
4 |
| Kaufman County |
9 |
| Kendall County |
2 |
| Kerr County |
2 |
| Kimble County |
2 |
| Kinney County |
1 |
| Kleberg County |
1 |
| Knox County |
7 |
| La Salle County |
1 |
| Lamar County |
2 |
| Lamb County |
5 |
| Lampasas County |
13 |
| Lee County |
3 |
| Leon County |
1 |
| Liberty County |
8 |
| Limestone County |
3 |
| Lipscomb County |
4 |
| Live Oak County |
3 |
| Llano County |
3 |
| Lubbock County |
33 |
| Lynn County |
4 |
| Mason County |
2 |
| Maverick County |
1 |
| McCulloch County |
1 |
| McLennan County |
29 |
| Medina County |
4 |
| Menard County |
1 |
| Midland County |
7 |
| Milam County |
3 |
| Mills County |
4 |
| Montague County |
23 |
| Montgomery County |
23 |
| Moore County |
11 |
| Morris County |
1 |
| Nacogdoches County |
6 |
| Navarro County |
6 |
| Newton County |
1 |
| Nolan County |
5 |
| Nueces County |
6 |
| Ochiltree County |
4 |
| Oldham County |
5 |
| Orange County |
10 |
| Palo Pinto County |
7 |
| Parker County |
49 |
| Parmer County |
3 |
| Polk County |
1 |
| Potter County |
18 |
| Randall County |
53 |
| Red River County |
3 |
|
| Roberts County |
3 |
| Rockwall County |
6 |
| Runnels County |
1 |
| Rusk County |
1 |
| Sabine County |
1 |
| San Jacinto County |
1 |
| San Patricio County |
4 |
| San Saba County |
4 |
| Scurry County |
4 |
| Shackelford County |
4 |
| Shelby County |
3 |
| Sherman County |
10 |
| Smith County |
4 |
| Somervell County |
3 |
| Starr County |
2 |
| Stephens County |
3 |
| Stonewall County |
13 |
| Swisher County |
12 |
| Tarrant County |
47 |
| Taylor County |
60 |
| Terrell County |
1 |
| Terry County |
2 |
| Throckmorton County |
3 |
| Titus County |
6 |
| Tom Green County |
6 |
| Travis County |
12 |
| Trinity County |
1 |
| Upton County |
1 |
| Uvalde County |
6 |
| Val Verde County |
2 |
| Van Zandt County |
5 |
| Walker County |
1 |
| Waller County |
6 |
| Washington County |
6 |
| Webb County |
5 |
| Wheeler County |
7 |
| Wichita County |
35 |
| Wilbarger County |
9 |
| Willacy County |
2 |
| Williamson County |
29 |
| Wilson County |
4 |
| Wise County |
40 |
| Wood County |
3 |
| Young County |
14 |
| Zapata County |
2 |
| Zavala County |
1 |
|
These county and county equivalent data data are based on information voluntarily reported by state health officials and federal agenciesto CDC. West Nile Virus (WNV) infection was determined by laboratory testing on animals other than wild birds (such as pets, livestock, and wildlife) with symtoms of WNV infection. Note that the map includes all areas of positive (confirmed or probable) WNV results, but not necessarily all areas with submitted samples or no reports.
