Historical Data

Summary of Zika Cases

Total annual Zika disease cases for the past three years were as follows:

  • 2015: 8 cases
  • 2016: 315 cases
  • 2017: 55 cases

The data table below includes 11 cases of Zika virus disease likely transmitted by mosquitoes in Cameron and Hidalgo counties. All other cases were related to travel to areas with ongoing Zika transmission, including two cases acquired by sexual contact with travelers and four cases passed from mother to child before birth.

See the latest Zika cases.

2015-2017 Reported Zika Cases

Texas Zika Cases by County
County 2015 Cases 2016 Cases 2017 Cases
Angelina 0 2* 0
Bastrop 0 1 0
Bell 0 7 0
Bexar 0 21 4
Brazoria 0 2 1
Brazos 0 4 1
Burnet 0 1 0
Cameron 0 26† 14‡
Collin 0 8 3
Dallas 0 44* 3
Denton 0 9 1
El Paso 0 3 0
Ellis 0 1 0
Fort Bend 1 11 0
Frio 0 1 0
Galveston 0 9 0
Gray 0 1 0
Grayson 0 1 0
Gregg 0 1 0
Hamilton 0 1 0
Harris 7 74 11
Hays 0 1 0
Hidalgo 0 6 8‡
Hockley 0 1 0
Jackson 0 1 0
Jefferson 0 2 0
Jones 0 1 0
Kerr 0 0 1
Lee 0 1 0
Lubbock 0 1 1
Matagorda 0 1 0
Medina 0 1 0
Midland 0 1 0
Montgomery 0 1 0
Navarro 0 1 0
Palo Pinto 0 1 0
Parker 0 1 0
Randall 0 1 0
Rusk 0 1 0
Smith 0 1 2
Starr 0 1 0
Tarrant 0 28 1
Travis 0 18 1
Upshur 0 1 1
Val Verde 0 1 0
Walker 0 1 0
Webb 0 6 1
Willacy 0 1 0
Williamson 0 5 1
Wise 0 1 0

All cases are travel related except:
* Includes sexually transmitted cases in Texas: Angelina (1), Dallas (1)
† Includes cases transmitted by mosquitoes in Texas: Cameron (6)
‡ Includes cases transmitted by mosquitoes in Texas: Cameron (1), Hidalgo (4)

last updated May 31, 2018