This page is general health information, not medical advice. It cannot tell you whether you have an infection. A clinician can, and the testing options on this site are a good place to start.

If you are trying to make sense of STD rates in Las Vegas, you are in the right place. This guide walks through the newest published figures for chlamydia, gonorrhea, syphilis and HIV. It explains what the numbers can and cannot tell you, how Clark County compares with Nevada, what changed from 2024 to 2025, and where free and low-cost testing is available.

Public health numbers can feel heavy. They are not a verdict on any person or neighborhood. They are a count of infections that were tested for, diagnosed and reported, and they are one of the best tools a community has for deciding where to put testing and care.

Key takeaways

In 2023, Clark County reported 12,563 chlamydia cases (525.2 per 100,000 people) and 5,768 gonorrhea cases (241.1 per 100,000), according to the Nevada Office of State Epidemiology.
Clark County's 2023 rates for chlamydia, gonorrhea and primary and secondary syphilis were each higher than the statewide rates for Nevada.
The Nevada Division of Public and Behavioral Health reports 552 new HIV diagnoses in Clark County for 2024 (22.6 per 100,000).
Provisional 2025 counts from the Southern Nevada Health District are lower than 2024 for every infection listed. Provisional counts can change, so treat that as an early signal and not a conclusion.
Many infections cause no symptoms, so testing is the only way to know. The Southern Nevada Health District offers free Express Testing for people without symptoms, and several clinics charge on a sliding scale.

In this guide

How to read STD rates
Latest figures for Las Vegas and Clark County
STD rates by state and by city: where Las Vegas fits
Year-on-year change
What shapes the numbers
Nevada rules that affect testing and reporting
Free and low-cost testing in Las Vegas
Sources

How to Read STD Rates

Before the figures, a few plain definitions. They make every number below easier to use.

Cases and rates are different things

A case count is the number of infections reported in a year. A rate divides that count by the population and states it per 100,000 people. Rates let you compare places of different sizes. A county of two million people will always have more cases than a town of fifty thousand, even if the rate is lower.

Rates count reported infections, not all infections

A reported case is an infection that someone was tested for, a clinician or lab diagnosed, and the health department received. The CDC notes that many chlamydia and gonorrhea infections cause no symptoms, so they can go unnoticed unless someone is tested. That means a rate reflects both how much infection there is and how much testing is happening.

A higher rate can mean more infection. It can also mean more people got tested. Neither reading says anything about the character of the people who live there.

Different infections use different measures

Syphilis figures in this guide are for primary and secondary syphilis, the early stages that are most closely tracked. HIV figures are new diagnoses in a year, which is not the same as the number of people living with HIV. The infection counts for chlamydia and gonorrhea are all reported cases.

Some data is final and some is provisional

The most recent complete state report for chlamydia, gonorrhea and syphilis is the Nevada 2023 STD Fast Facts from the Nevada Office of State Epidemiology. HIV figures come from the Nevada Division of Public and Behavioral Health (DPBH) HIV Fast Facts for 2024, with a preliminary 2025 edition. The Southern Nevada Health District also publishes quarterly Clark County disease statistics, and its 2025 counts are provisional.

Latest Figures for Las Vegas and Clark County

Las Vegas is in Clark County, and the Southern Nevada Health District (SNHD) is the public health agency for the county. SNHD says it serves more than 2.3 million residents. Health data for Las Vegas is almost always reported at the county level, so the numbers below describe Clark County as a whole.

Chlamydia

The Nevada Office of State Epidemiology reports 12,563 chlamydia cases in Clark County in 2023. That is a rate of 525.2 per 100,000 residents. Chlamydia is the most commonly reported of the infections covered here. The CDC says it is curable with treatment from a clinician.

Gonorrhea

The same report lists 5,768 gonorrhea cases in Clark County in 2023, a rate of 241.1 per 100,000. Gonorrhea is also curable with treatment from a clinician, according to the CDC.

Syphilis

For 2023, the Nevada Office of State Epidemiology reports 554 primary and secondary syphilis cases in Clark County, a rate of 23.2 per 100,000. Syphilis is curable with treatment from a clinician. The CDC says it can be present without noticeable symptoms, which is why blood testing matters.

HIV

The Nevada DPBH 2024 HIV Fast Facts reports 552 new HIV diagnoses in Clark County in 2024, a rate of 22.6 per 100,000. HIV is not curable, but the CDC says it is treatable, and people who take HIV treatment as a clinician prescribes can live long, healthy lives.

Infection	Year	Clark County cases	Clark County rate per 100,000	Source
Chlamydia	2023	12,563	525.2	Nevada Office of State Epidemiology
Gonorrhea	2023	5,768	241.1	Nevada Office of State Epidemiology
Syphilis (primary and secondary)	2023	554	23.2	Nevada Office of State Epidemiology
HIV (new diagnoses)	2024	552	22.6	Nevada DPBH HIV Fast Facts

STD Rates by State and by City: Where Las Vegas Fits

People often search for STD rates by state or STD rates by city to see how their community compares. Both comparisons are useful, and both come with limits worth knowing.

Clark County compared with Nevada

The Nevada Office of State Epidemiology publishes statewide figures alongside county figures, so a direct comparison is possible for 2023. Clark County's rates were higher than the statewide rates for all three infections.

Infection (2023)	Nevada cases	Nevada rate per 100,000	Clark County rate per 100,000
Chlamydia	15,766	481.9	525.2
Gonorrhea	6,538	199.8	241.1
Syphilis (primary and secondary)	725	22.2	23.2

Source: Nevada Office of State Epidemiology, Nevada 2023 STD Fast Facts. The report calculates crude rates using 2022 Nevada State Demographer population projections.

For HIV, the Nevada DPBH 2024 HIV Fast Facts reports 605 new diagnoses statewide in 2024, a rate of 18.2 per 100,000. Clark County's rate for the same year was 22.6 per 100,000.

Clark County is by far the largest part of the state, so it accounts for most of Nevada's cases. In 2023, 12,563 of the state's 15,766 chlamydia cases and 5,768 of its 6,538 gonorrhea cases were in Clark County.

Nevada compared with other states

A fair state-to-state comparison needs the same year, the same definitions and the same population method. The CDC publishes that kind of comparison in its national STI surveillance reports and in its AtlasPlus data tool, where you can look up any state, county and infection. This guide does not copy out a ranking, because a ranking shifts with each report year and a number without its year can mislead.

If you want to compare Nevada with another state, open CDC AtlasPlus, choose the infection and the year, and read the rate per 100,000. Check that you are comparing like with like.

What about the city of Las Vegas itself?

The sources used here report by county, not by city. The Nevada Office of State Epidemiology and the Southern Nevada Health District publish Clark County figures, which include Las Vegas, Henderson, North Las Vegas and the surrounding area. A separate city-only rate for Las Vegas was not found in these reports. If you need one, ask the Southern Nevada Health District directly.

This is true for most cities. City-level rates are rare because small populations make single-year numbers unstable. County data is the most reliable local picture.

Year-on-Year Change

The most recent year-on-year picture comes from two places. The Southern Nevada Health District publishes quarterly Clark County disease statistics, and its fourth-quarter 2025 report (data as of February 5, 2026) gives calendar-year 2025 counts next to 2024. The Nevada DPBH also released preliminary 2025 HIV figures.

These 2025 numbers are provisional or preliminary. Cases are still being reported and confirmed, so they may change. The comparisons below are approximate and show direction, not a final answer.

Clark County (SNHD)	2024 year to date	2025 year to date (provisional)	Approximate change
Chlamydia	12,579	11,994	about 5% lower
Gonorrhea	5,250	4,951	about 6% lower
HIV	525	425	about 19% lower
Syphilis, primary and secondary	371	191	about 49% lower
Syphilis, early non-primary non-secondary	568	363	about 36% lower
Congenital syphilis	36	0	no cases listed so far in 2025

Source: Southern Nevada Health District, Quarter 4, 2025: Clark County Disease Statistics.

HIV in Clark County and Nevada

The Nevada DPBH 2025 HIV Fast Facts reports preliminary figures of 454 new HIV diagnoses in Clark County (18.7 per 100,000) and 502 statewide (15.1 per 100,000). Those are lower than the 2024 figures of 552 and 605.

The DPBH adds an important caveat. A decrease in new diagnoses does not necessarily indicate reduced transmission. Fewer diagnoses can also reflect fewer people being tested, or reporting that has not caught up. The HIV counts also differ slightly between sources, such as 552 in the state fact sheet and 525 in the SNHD year-to-date table for 2024, because the two count by different methods and dates.

How to hold these numbers

A drop in the counts is encouraging news if it holds when final data arrives. It is not a reason to skip testing. The numbers describe a whole county, and they cannot say anything about your own health. Only a test can do that.

What Shapes the Numbers

No single cause explains STD rates in any city. Several things move the numbers at once, and public health agencies are careful about pinning a trend on one factor. Here are the main forces that the CDC and health departments describe.

How much testing happens

Because many infections have no symptoms, the number found depends on how many people are tested. A county that expands testing may see reported cases rise at first, because it is finding infections that were already there. A county where testing slows may see reported cases fall without any real drop in infection.

Access to care

Cost, transportation, clinic hours, insurance status and worry about privacy all affect whether someone gets tested and treated. Free walk-in testing, sliding-scale fees and clinics open on Saturdays are practical ways to reduce those barriers. The local clinic details are in the testing section below.

A large, mobile population

Clark County has more than 2.3 million residents, according to the Southern Nevada Health District, and Las Vegas hosts many visitors. A large and mobile population is a testing and outreach challenge for any health department. The reports used here do not break out visitors, so this guide does not put a number on their effect.

Treatment and partner care

Bacterial infections can pass back and forth between partners if only one person is treated. For this reason, clinicians often talk with patients about partners. Nevada allows expedited partner therapy, which lets a clinician provide treatment for a patient's partner without a separate visit in some situations. The CDC lists it as permissible in Nevada as of March 16, 2009.

New prevention tools

HIV prevention medicines (PrEP and PEP) and doxycycline taken after sex to lower the chance of some bacterial infections (doxy-PEP) are now part of the picture. The CDC issued doxy-PEP guidance in 2024. These are options a clinician prescribes after a conversation about your situation. The Southern Nevada Health District and its community health center list PrEP, PEP and doxy-PEP among their sexual health services.

It is too early to say how much any of these tools have shaped Clark County's trends. Attributing a change to one tool would go beyond what the published data shows.

Syphilis and pregnancy

Syphilis in pregnancy can lead to congenital syphilis in a baby, which is why testing during pregnancy is standard. The SNHD provisional table lists 36 congenital syphilis cases for 2024 and none so far for 2025. Because 2025 data is still being finalized, wait for the final report before drawing a conclusion.

Nevada Rules That Affect Testing and Reporting

A few state rules help explain where the numbers come from and what your options are.

Reporting to the health authority

Under Nevada Administrative Code chapter 441A, genital chlamydia infection, gonococcal infection, HIV infection and syphilis are reportable communicable diseases. Health care providers who know of or treat a case or suspected case must report it to the health authority where their office is located (NAC 441A.040 and NAC 441A.230). This reporting is how the case counts in this guide are built.

Minors can consent to STD care

Under NRS 129.060, a minor in Nevada may give express consent to examination and treatment for any sexually transmitted disease, and to STD prevention services. The statute names no minimum age.

Syphilis testing in pregnancy

Nevada Revised Statutes 442.010 requires a syphilis test at the first prenatal visit and again in the third trimester (weeks 27 to 36). A test at delivery is required for women in certain groups, including those without prenatal care. Ask your prenatal provider for the full details that apply to you.

Exposure and the law

Nevada handles exposure to communicable diseases under NRS 441A.180, as amended in 2021. The statute makes it a misdemeanor in limited situations, such as after a written warning from the health authority, and it provides defenses for a partner's informed consent and for using means to prevent transmission. If you have questions about how this applies to you, a clinician or the health district can point you to the right resource.

Free and Low-Cost Testing in Las Vegas

The CDC recommends testing based on age, sexual activity and other factors, and the U.S. Preventive Services Task Force (USPSTF) recommends HIV screening for adolescents and adults ages 15 to 65. It also recommends chlamydia and gonorrhea screening for sexually active women 24 and younger and for older women at increased risk. A clinician can tell you which tests fit your situation.

For a full list with details, see this guide to where to get tested in Las Vegas and what it costs. Here is a summary of the main options, based on what each organization publishes.

Southern Nevada Health District Sexual Health Clinic

The Southern Nevada Health District Sexual Health Clinic has two Las Vegas locations. Call (702) 759-1700 for either one.

Main facility: 280 S. Decatur Blvd., Las Vegas, NV 89107. The clinic page lists Monday, Wednesday and Thursday 7:00 AM to 6:00 PM, and Tuesday 9:00 AM to 6:00 PM. Free Express Testing here runs Monday to Thursday, 7:30 AM to 12 PM and 1 PM to 3:30 PM.
Fremont Public Health Center: 2830 E. Fremont St., Las Vegas, NV 89104. The clinic page lists Tuesday 9:00 AM to 6:00 PM, and Wednesday to Friday 7:00 AM to 6:00 PM. Free Express Testing here is on Fridays, 7:30 AM to 4 PM. SNHD asks you to arrive by 5:30 PM to allow time for processing.

The health district describes Express Testing as a fast, free walk-in service for people who do not have symptoms. For other visits, the district says walk-ins for STI testing and treatment are available until capacity is reached, and charges are based on income and household size. It also says you will not be turned away because you cannot pay on the day of your visit. Bring photo ID and proof of income. PrEP and PEP appointments are scheduled by phone.

The district's own pages list different hours in places, so confirm the hours before you go. SNHD also offers Express Testing outside Las Vegas, on Tuesdays in Henderson and on the fourth Monday of the month in Mesquite.

Arlene Cooper Community Health Center at The Center

The Arlene Cooper Community Health Center, run by The LGBTQ Community Center of Southern Nevada, is at 401 S. Maryland Parkway, Las Vegas, NV 89101. Call 702-802-5432 for appointments. It lists Monday to Friday 8:00 AM to 6:00 PM and Saturday 7:30 AM to 4:00 PM, and its site footer shows different hours, so confirm before you go.

The Center says HIV testing is free and STI screening is low cost, and that some insurance is billed. Appointments are encouraged, with walk-ins available for a limited number of patients each day. Treatment for STIs is provided on site, and the Center lists PrEP navigation, in person and online, with low-cost and no-cost options.

Nevada Health Centers

Nevada Health Centers lists STD testing, HIV testing, PrEP and PEP, with a sliding-fee program based on family size and income. Two Las Vegas sites are the Martin Luther King Family Health Center at 1799 Mount Mariah Dr. (702.383.1961) and the Nellis Family Medical Center at 691 N. Nellis Blvd. (702.563.4662). The published pages do not say whether walk-ins are accepted, so call first. Its PrEP navigator is at 702-563-4618.

UNLV students

The UNLV Student Health Center lists testing for sexually transmitted infections, including HIV, for UNLV students. It is in the Student Recreation and Wellness Center at 4505 S. Maryland Pkwy. Call 702-895-3370. It does not publish a price, so ask when you call.

Testing without a clinic visit

The Southern Nevada Health District runs a program called Collect2Protect for Nevada residents. It offers at-home HIV self-test kits and mail-in self-collection kits for gonorrhea and chlamydia. The district's 2020 announcement described the HIV kits as free and the gonorrhea and chlamydia kits as fee-based. The current program page does not state prices, so check with the district for current costs. The program does not accept insurance or Medicaid, and the page says results can be ready within 7 to 10 business days after the lab receives the specimen.

You can also search by ZIP code on the CDC's GetTested locator to find more testing sites.

When to test after a possible exposure

Tests cannot detect every infection right away. For HIV, the CDC lists different window periods by test type: roughly 10 to 33 days for a nucleic acid test, 18 to 45 days for a lab antigen and antibody blood test, 18 to 90 days for a rapid antigen and antibody finger-stick test, and 23 to 90 days for an antibody-only test. A clinician can tell you which test fits your timing and whether a follow-up test makes sense. If you think you were exposed to HIV in the last 72 hours, ask a clinician about PEP right away.

A test result, and only a test result, can tell you about your own health. A clinician can explain what a result means and, if treatment is needed, prescribe it.

STD Rates in Las Vegas: What the Latest Data Shows