STD Rates in St. Louis County, Missouri

2023 CDC surveillance data for St. Louis County, Missouri — chlamydia, gonorrhea, and syphilis rates with state comparisons.

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Data Year: 2023 Source: CDC STI Surveillance Population: 987,093
Combined
946
per 100K
5th / 115
Chlamydia
635.3
per 100K • 6,271 cases
Gonorrhea
294.7
per 100K • 2,909 cases
Syphilis P&S
16
per 100K • 158 cases

St. Louis County has one of the higher STD burdens in Missouri, with a combined rate of 946.0 per 100,000 residents in 2023 — ranking 5th of 115 counties. Reported infections included chlamydia at 635.3 per 100,000 (6,271 cases, 27% above the state rate), gonorrhea at 294.7 per 100,000 (2,909 cases, 46% above the state rate), syphilis at 16.0 per 100,000 (158 cases, 26% below the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. St. Louis County has confidential testing locations available.

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St. Louis County County vs Missouri Average

Infection St. Louis County County Missouri Rate Difference
Chlamydia 635.3 498.6 27% above
Gonorrhea 294.7 201.9 46% above
Syphilis (P&S) 16 21.5 26% below

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Other Counties in Missouri

Adair County → Andrew County → Atchison County → Audrain County → Barry County → Barton County → Bates County → Benton County → Bollinger County → Boone County → Buchanan County → Butler County → Caldwell County → Callaway County → Camden County → Cape Girardeau County → Carroll County → Carter County → Cass County → Cedar County → Chariton County → Christian County → Clark County → Clay County → Clinton County → Cole County → Cooper County → Crawford County → Dade County → Dallas County → Daviess County → Dekalb County → Dent County → Douglas County → Dunklin County → Franklin County → Gasconade County → Gentry County → Greene County → Grundy County → Harrison County → Henry County → Hickory County → Holt County → Howard County → Howell County → Iron County → Jackson County → Jasper County → Jefferson County → Johnson County → Knox County → Laclede County → Lafayette County → Lawrence County → Lewis County → Lincoln County → Linn County → Livingston County → Macon County → Madison County → Maries County → Marion County → Mcdonald County → Mercer County → Miller County → Mississippi County → Moniteau County → Monroe County → Montgomery County → Morgan County → New Madrid County → Newton County → Nodaway County → Oregon County → Osage County → Ozark County → Pemiscot County → Perry County → Pettis County → Phelps County → Pike County → Platte County → Polk County → Pulaski County → Putnam County → Ralls County → Randolph County → Ray County → Reynolds County → Ripley County → Saline County → Schuyler County → Scotland County → Scott County → Shannon County → Shelby County → St. Charles County → St. Clair County → St. Francois County → St. Louis City → Ste. Genevieve County → Stoddard County → Stone County → Sullivan County → Taney County → Texas County → Vernon County → Warren County → Washington County → Wayne County → Webster County → Worth County → Wright County →

STD Testing Locations in St. Louis County, Missouri

FAQs

St. Louis County ranks 5th of 115 Missouri counties for combined STD rate in 2023, at 946.0 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in St. Louis County, with 6,271 cases at a rate of 635.3 per 100,000 residents.
STDTest.com lists confidential testing locations across St. Louis County and Missouri. Many offer same-day appointments with results in 1u20133 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