STD Rates in Bay County, Michigan

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

Data Year: 2023 Source: CDC STI Surveillance Population: 102,512
Combined
292.7
per 100K
26th / 83
Chlamydia
246.8
per 100K • 253 cases
US rate: 490.7
23rd of 83 in Michigan
Higher than 41% of US counties
Gonorrhea
42
per 100K • 43 cases
US rate: 178.2
33rd of 83 in Michigan
Higher than 34% of US counties
Syphilis P&S
3.9
per 100K • 4 cases
Based on 4 cases — interpret with care
US rate: 15.8

Bay County reported a combined STD rate of 292.7 per 100,000 residents in 2023, placing it 26th of 83 Michigan counties — in the upper half of the state. Reported infections included chlamydia at 246.8 per 100,000 (253 cases, 43% below the state rate), gonorrhea at 42.0 per 100,000 (43 cases, 72% below the state rate), syphilis at 3.9 per 100,000 (4 cases, too few for a reliable comparison). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Bay County has confidential testing locations available.

STD Trends in Bay County, 2000–2023

Reported cases per 100,000 residents each year, against the Michigan rate (dashed). In a county this size a handful of cases moves the rate a long way, so read the shape rather than any single year.

Chlamydia
246.8
per 100K in 2023
199.6 in 2000
Peak 397.3 in 2018
Gonorrhea
42.0
per 100K in 2023
48.1 in 2000
Peak 133.0 in 2021
Syphilis (P&S)
3.9
per 100K in 2023
0.0 in 2000
Peak 5.8 in 2018

Source: CDC NCHHSTP AtlasPlus county surveillance, 2000–2023.

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Bay County vs Michigan and the US

Infection Bay County Michigan US vs Michigan vs US Rank in Michigan
Chlamydia 246.8253 cases 429.5 490.7 42.5% below 49.7% below 23rd of 83
Gonorrhea 4243 cases 152.2 178.2 72.4% below 76.4% below 33rd of 83
Syphilis (P&S) 3.94 cases 8.4 15.8 Too few cases Too few cases –

Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among Michigan’s counties. The US rate is all 50 states combined. Comparisons are left out where fewer than 20 cases were reported, because a rate built on so few cases can swing widely from one year to the next.

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FAQs

Bay County ranks 26th of 83 Michigan counties for combined STD rate in 2023, at 292.7 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Bay County, with 253 cases at a rate of 246.8 per 100,000 residents.
STDTest.com lists confidential testing locations across Bay County and Michigan. Many offer same-day appointments with results in 1–3 days.
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.