STD Rates in Baltimore County, Maryland

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 844,679
Combined
786.3
per 100K
6th / 24
Chlamydia
568.5
per 100K • 4,802 cases
Gonorrhea
198.4
per 100K • 1,676 cases
Syphilis P&S
19.4
per 100K • 164 cases

Baltimore County has one of the higher STD burdens in Maryland, with a combined rate of 786.3 per 100,000 residents in 2023 — ranking 6th of 24 counties. Reported infections included chlamydia at 568.5 per 100,000 (4,802 cases, 2% below the state rate), gonorrhea at 198.4 per 100,000 (1,676 cases, 4% below the state rate), syphilis at 19.4 per 100,000 (164 cases, 37% above the state rate). Confidential STD testing is available throughout Baltimore County — knowing your status is the only way to catch infections that often show no symptoms.

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Baltimore County vs Maryland Average

Infection Baltimore County Maryland Rate Difference
Chlamydia 568.5 579.8 2% below
Gonorrhea 198.4 207.1 4% below
Syphilis (P&S) 19.4 14.2 37% above

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Largest cities in Baltimore County, Maryland

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

STD testing in Baltimore, MD573,243 people → STD testing in Dundalk, MD65,969 people → STD testing in Towson, MD58,679 people → STD testing in Catonsville, MD43,368 people → STD testing in Essex, MD40,580 people → STD testing in Owings Mills, MD37,245 people → STD testing in Randallstown, MD35,957 people → STD testing in Pikesville, MD33,524 people → STD testing in Middle River, MD31,712 people → STD testing in Milford Mill, MD30,829 people →
Show all 18 cities ↓Show fewer cities ↑
STD testing in Parkville, MD30,549 people → STD testing in Perry Hall, MD29,105 people → STD testing in Carney, MD28,343 people → STD testing in Lochearn, MD27,074 people → STD testing in Cockeysville, MD23,962 people → STD testing in Mays Chapel, MD16,066 people → STD testing in Overlea, MD13,035 people → STD testing in Garrison, MD9,469 people →

Largest Counties in Maryland

Montgomery County → Prince George's County → Anne Arundel County → Baltimore City → Howard County → Frederick County → Harford County → Carroll County → Charles County → Washington County →

All 24 Maryland counties → STD testing in Maryland →

FAQs

Baltimore County ranks 6th of 24 Maryland counties for combined STD rate in 2023, at 786.3 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Baltimore County, with 4,802 cases at a rate of 568.5 per 100,000 residents.
STDTest.com lists confidential testing locations across Baltimore County and Maryland. 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