STD Rates in Larimer County, Colorado
2023 CDC surveillance data for Larimer County, Colorado — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Larimer County reported a combined STD rate of 329.5 per 100,000 residents in 2023, placing it 29th of 61 Colorado counties — in the upper half of the state. Reported infections included chlamydia at 274.8 per 100,000 (1,019 cases, 37% below the state rate), gonorrhea at 50.4 per 100,000 (187 cases, 61% below the state rate), syphilis at 4.3 per 100,000 (16 cases, too few for a reliable comparison). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Larimer County has confidential testing locations available.
STD Trends in Larimer County, 2000–2023
Reported cases per 100,000 residents each year, against the Colorado 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.
Source: CDC NCHHSTP AtlasPlus county surveillance, 2000–2023.
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Larimer County vs Colorado and the US
| Infection | Larimer County | Colorado | US | vs Colorado | vs US | Rank in Colorado |
|---|---|---|---|---|---|---|
| Chlamydia | 274.81,019 cases | 435.1 | 490.7 | 36.8% below | 44% below | 27th of 61 |
| Gonorrhea | 50.4187 cases | 128.7 | 178.2 | 60.8% below | 71.7% below | 29th of 61 |
| Syphilis (P&S) | 4.316 cases | 16 | 15.8 | Too few cases | Too few cases | – |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among Colorado’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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