STD Rates in Grant County, Wisconsin

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 51,404
Combined
254.9
per 100K
32nd / 72
Chlamydia
231.5
per 100K • 119 cases
Gonorrhea
19.5
per 100K • 10 cases
Syphilis P&S
3.9
per 100K • 2 cases

Grant County reported a combined STD rate of 254.9 per 100,000 residents in 2023, placing it 32nd of 72 Wisconsin counties — in the upper half of the state. Reported infections included chlamydia at 231.5 per 100,000 (119 cases, 45% below the state rate), gonorrhea at 19.5 per 100,000 (10 cases, 84% below the state rate), syphilis at 3.9 per 100,000 (2 cases, 57% below the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Grant County has confidential testing locations available.

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Grant County vs Wisconsin Average

Infection Grant County Wisconsin Rate Difference
Chlamydia 231.5 422.8 45% below
Gonorrhea 19.5 118.5 84% below
Syphilis (P&S) 3.9 9.1 57% below

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Largest cities in Grant County, Wisconsin

Largest first, by Census population. Each city page lists nearby clinics, free and low-cost testing, and labs.

STD testing in Platteville, WI11,499 people → STD testing in Lancaster, WI3,976 people →

Largest Counties in Wisconsin

Milwaukee County → Dane County → Waukesha County → Brown County → Racine County → Outagamie County → Winnebago County → Kenosha County → Rock County → Marathon County →

All 72 Wisconsin counties → STD testing in Wisconsin →

FAQs

Grant County ranks 32nd of 72 Wisconsin counties for combined STD rate in 2023, at 254.9 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Grant County, with 119 cases at a rate of 231.5 per 100,000 residents.
STDTest.com lists confidential testing locations across Grant County and Wisconsin. Many offer same-day appointments with results in 1–3 days.

Related Resources

STD Testing Window Periods How Soon After Sex to Test STD Symptoms Guide Testing Timeline Chart All Testing Clinics STD Statistics and Data
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.
Sources