STD Rates in Marion County, Iowa

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 33,762
Combined
222.2
per 100K
64th / 99
Chlamydia
186.6
per 100K • 63 cases
Gonorrhea
32.6
per 100K • 11 cases
Syphilis P&S
3
per 100K • 1 cases

Marion County recorded a combined STD rate of 222.2 per 100,000 residents in 2023, ranking 64th of 99 counties in Iowa. Reported infections included chlamydia at 186.6 per 100,000 (63 cases, 56% below the state rate), gonorrhea at 32.6 per 100,000 (11 cases, 72% below the state rate), syphilis at 3.0 per 100,000 (1 case, 71% below the state rate). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Marion County.

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Marion County vs Iowa Average

Infection Marion County Iowa Rate Difference
Chlamydia 186.6 426.8 56% below
Gonorrhea 32.6 116.8 72% below
Syphilis (P&S) 3 10.3 71% below

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Largest cities in Marion County, Iowa

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

STD testing in Pella, IA10,720 people → STD testing in Knoxville, IA7,473 people →

Largest Counties in Iowa

Polk County → Linn County → Scott County → Johnson County → Black Hawk County → Dallas County → Woodbury County → Dubuque County → Story County → Pottawattamie County →

All 99 Iowa counties → STD testing in Iowa →

FAQs

Marion County ranks 64th of 99 Iowa counties for combined STD rate in 2023, at 222.2 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Marion County, with 63 cases at a rate of 186.6 per 100,000 residents.
STDTest.com lists confidential testing locations across Marion County and Iowa. 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