STD Rates in Los Alamos County, New Mexico

2023 CDC surveillance data for Los Alamos County, New Mexico — chlamydia, gonorrhea, and syphilis rates with state comparisons.

Data Year: 2023 Source: CDC STI Surveillance Population: 19,444
Combined
133.7
per 100K
31st / 32
Chlamydia
108
per 100K • 21 cases
US rate: 490.7
31st of 32 in New Mexico
Higher than 6% of US counties
Gonorrhea
20.6
per 100K • 4 cases
Based on 4 cases — interpret with care
US rate: 178.2
Syphilis P&S
5.1
per 100K • 1 cases
Based on 1 case — interpret with care
US rate: 15.8

Los Alamos County is among the lower-burden counties in New Mexico, reporting a combined STD rate of 133.7 per 100,000 residents in 2023 — 31st of 32 counties. Reported infections included chlamydia at 108.0 per 100,000 (21 cases, 79% below the state rate), gonorrhea at 20.6 per 100,000 (4 cases, too few for a reliable comparison), syphilis at 5.1 per 100,000 (1 case, too few for a reliable comparison). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Los Alamos County.

STD Trends in Los Alamos County, 2000–2023

Reported cases per 100,000 residents each year, against the New Mexico 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
108.0
per 100K in 2023
11.0 in 2000
Peak 219.7 in 2016
Gonorrhea
20.6
per 100K in 2023
0.0 in 2000
Peak 57.3 in 2022
Syphilis (P&S)
5.1
per 100K in 2023
0.0 in 2000
Peak 10.4 in 2022

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

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Los Alamos County vs New Mexico and the US

Infection Los Alamos County New Mexico US vs New Mexico vs US Rank in New Mexico
Chlamydia 10821 cases 523.6 490.7 79.4% below 78% below 31st of 32
Gonorrhea 20.64 cases 169 178.2 Too few cases Too few cases
Syphilis (P&S) 5.11 case 36.6 15.8 Too few cases Too few cases

Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among New Mexico’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

Los Alamos County ranks 31st of 32 New Mexico counties for combined STD rate in 2023, at 133.7 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Los Alamos County, with 21 cases at a rate of 108.0 per 100,000 residents.
STDTest.com lists confidential testing locations across Los Alamos County and New Mexico. 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.