STD Rates in Arapahoe County, Colorado

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 656,002
Combined
709.1
per 100K
5th / 61
Chlamydia
528.2
per 100K • 3,465 cases
Gonorrhea
159.7
per 100K • 1,048 cases
Syphilis P&S
21.2
per 100K • 139 cases

Arapahoe County has one of the higher STD burdens in Colorado, with a combined rate of 709.1 per 100,000 residents in 2023 — ranking 5th of 61 counties. Reported infections included chlamydia at 528.2 per 100,000 (3,465 cases, 21% above the state rate), gonorrhea at 159.7 per 100,000 (1,048 cases, 24% above the state rate), syphilis at 21.2 per 100,000 (139 cases, 32% above the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Arapahoe County has confidential testing locations available.

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Arapahoe County vs Colorado Average

Infection Arapahoe County Colorado Rate Difference
Chlamydia 528.2 435.1 21% above
Gonorrhea 159.7 128.7 24% above
Syphilis (P&S) 21.2 16 32% above

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Largest cities in Arapahoe County, Colorado

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

STD testing in Aurora, CO394,432 people → STD testing in Centennial, CO108,201 people → STD testing in Littleton, CO44,710 people → STD testing in Englewood, CO34,129 people → STD testing in Greenwood Village, CO15,420 people → STD testing in Cherry Creek, CO10,721 people → STD testing in Castlewood, CO →

Largest Counties in Colorado

El Paso County → Denver County → Jefferson County → Adams County → Douglas County → Larimer County → Weld County → Boulder County → Pueblo County → Mesa County →

All 61 Colorado counties → STD testing in Colorado →

FAQs

Arapahoe County ranks 5th of 61 Colorado counties for combined STD rate in 2023, at 709.1 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Arapahoe County, with 3,465 cases at a rate of 528.2 per 100,000 residents.
STDTest.com lists confidential testing locations across Arapahoe County and Colorado. 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