STD Rates in Harris County, Texas

2023 CDC surveillance data for Harris County, Texas — chlamydia, gonorrhea, and syphilis rates with state comparisons.

Data Year: 2023 Source: CDC STI Surveillance Population: 4,835,360
Combined
910.2
per 100K
12th / 247
Chlamydia
641.4
per 100K • 31,014 cases
US rate: 490.7
13th of 247 in Texas
Higher than 87% of US counties
Gonorrhea
240.6
per 100K • 11,631 cases
US rate: 178.2
8th of 247 in Texas
Higher than 88% of US counties
Syphilis P&S
28.2
per 100K • 1,363 cases
US rate: 15.8
17th of 247 in Texas
Higher than 88% of US counties

Harris County has one of the higher STD burdens in Texas, with a combined rate of 910.2 per 100,000 residents in 2023 — ranking 12th of 247 counties. Reported infections included chlamydia at 641.4 per 100,000 (31,014 cases, 30% above the state rate), gonorrhea at 240.6 per 100,000 (11,631 cases, 36% above the state rate), syphilis at 28.2 per 100,000 (1,363 cases, 88% above the state rate). Confidential STD testing is available throughout Harris County — knowing your status is the only way to catch infections that often show no symptoms.

STD Trends in Harris County, 2000–2023

Reported cases per 100,000 residents each year, against the Texas rate (dashed). In a county this size a handful of cases moves the rate a long way, so read the shape rather than any single year.

Chlamydia
641.4
per 100K in 2023
357.7 in 2000
Peak 654.8 in 2022
Gonorrhea
240.6
per 100K in 2023
173.3 in 2000
Peak 274.4 in 2021
Syphilis (P&S)
28.2
per 100K in 2023
2.1 in 2000
Peak 28.2 in 2023

Source: CDC NCHHSTP AtlasPlus county surveillance, 2000–2023.

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Harris County vs Texas and the US

Infection Harris County Texas US vs Texas vs US Rank in Texas
Chlamydia 641.431,014 cases 491.9 490.7 30.4% above 30.7% above 13th of 247
Gonorrhea 240.611,631 cases 176.4 178.2 36.4% above 35% above 8th of 247
Syphilis (P&S) 28.21,363 cases 15 15.8 88% above 78.5% above 17th of 247

Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among Texas’s counties. The US rate is all 50 states combined. Comparisons are left out where fewer than 20 cases were reported, because a rate built on so few cases can swing widely from one year to the next.

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FAQs

Harris County ranks 12th of 247 Texas counties for combined STD rate in 2023, at 910.2 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Harris County, with 31,014 cases at a rate of 641.4 per 100,000 residents.
STDTest.com lists confidential testing locations across Harris County and Texas. Many offer same-day appointments with results in 1–3 days.
Data sourced from the CDC's annual STI Surveillance Report. Rates are per 100,000 population and reflect reported cases only — actual prevalence is likely higher due to undiagnosed infections. While we strive for accuracy, STDTest.com makes no representations or warranties regarding the completeness or accuracy of this data and is not responsible for any errors or omissions. This page is for informational purposes only and does not constitute medical advice.