Sexually Transmitted Infections (STI) are the most commonly reported diseases in Washington State. Many are curable, others are treatable, all are preventable. Most people with STIs don't have obvious symptoms, but without treatment they can spread disease and possibly develop serious complications. Our STI program staff can help answer questions.
Alerts l Data l Cases and Rates l Fact Sheets
Health Care Providers Alerts
- Doxycycline for Postexposure Prophylaxis to Treat Bacterial STI Infection Provider Letter, Guidelines, and Resources
- 2023 National Bicillin shortage: prioritization of populations for treatment with Bicillin L-A®
- Congenital Syphilis Provider Letter and Updated Syphilis Screening Guidelines (PDF) 5/12/2022
- Syphilis Health Advisory -PHSKC (PDF) 1/21/2021
2023 Washington State STI Data*
| Chlamydia †** | Gonorrhea ‡ | Primary and Secondary Syphilis ‡ |
Syphilis-All Stages ‡ | Congenital Syphilis ‡ |
|
|---|---|---|---|---|---|
| Overall | Chlamydia †** Rate*: 359.9 per 100,000 # of cases: 28,301 # of cases in 2022: 28,719 |
Gonorrhea ‡ Rate*: 129.5 per 100,000 # of cases: 10,181 # of cases in 2022: 11,396 |
Primary and Secondary Syphilis ‡ Rate*: 21.1 per 100,000 # of cases: 1,661 # of cases in 2022: 1,918 |
Syphilis-All Stages ‡ Rate*: 57.0 per 100,000 # of cases: 4,480 # of cases in 2022: 4,439 |
Congenital Syphilis ‡ # of cases: 57 # of cases in 2022: 54 |
| Males*** | Chlamydia †** Rate*: 271.5 per 100,000 # of cases: 10,699 # of cases in 2022: 10,900 |
Gonorrhea ‡ Rate*: 175.4 per 100,000 # of cases: 6,914 # of cases in 2022: 7,369 |
Primary and Secondary Syphilis ‡ Rate*: 28.7 per 100,000 # of cases: 1,133 # of cases in 2022: 1,377 |
Syphilis-All Stages ‡ Rate*: 74.1 per 100,000 # of cases: 2,921 # of cases in 2022: 3,105 |
Congenital Syphilis ‡ N/A |
| Females*** | Chlamydia †** Rate*: 445.6 per 100,000 # of cases: 17,483 # of cases in 2022: 17,670 |
Gonorrhea ‡ Rate*: 80.2 per 100,000 # of cases: 3,146 # of cases in 2022: 3,949 |
Primary and Secondary Syphilis ‡ Rate*: 13.2 per 100,000 # of cases: 517 # of cases in 2022: 533 |
Syphilis-All Stages ‡ Rate*: 39.1 per 100,000 # of cases: 1,535 # of cases in 2022: 1,312 |
Congenital Syphilis ‡ N/A |
*Note: Washington State STI data may differ from CDC STI data as additional information is gathered over time. All rate calculations presented here are preliminary and calculated using the most recently available population estimates; therefore, please interpret them with caution.
**Note: Chlamydia & Gonorrhea case counts for 2023 include cases which were reported through electronic lab reporting (ELR) only.
***Note: Data presented for males and females reflects a patient’s sex at birth and may differ from data reported by gender.
† Data source: PHIMS-STD April 2024, WELRS
‡ Data source: PHIMS-STD April 2024.
Disclaimer: Case counts reflect reported cases only.
STI Cases and rates by county, Washington State
Sexually Transmitted Infection Cases and Rates by County, 2023 (PDF)
Sexually Transmitted Infection Cases and Rates by County, 2022 (PDF)
Sexually Transmitted Infection Cases and Rates by County, 2021 (PDF)
Sexually Transmitted Infection Cases and Rates by County, 2020 (PDF)
Sexually Transmitted Infection Cases and Rates by County, 2019 (PDF)
Sexually Transmitted Infection Cases and Rates by County, 2018 (PDF)
Sexually Transmitted Infection Cases and Rates by County, 2017 (PDF)
CDC Sexually Transmitted Disease Surveillance 2018 (PDF)
STI Data Dashboards
Check out our new STI data dashboards here: Sexually Transmitted Infections (STIs) Data | Washington State Department of Health.
These dashboards contain case counts and rates for chlamydia, gonorrhea, and syphilis in Washington for 2019-2022. This information can be filtered at the regional and local health jurisdiction level to show metrics based on race, sex, and year of diagnosis.
Get Tested, Get Treated!
Anyone under the age of 25 and is sexually active should get tested annually. At any age, if you think you may have been exposed to a sexually transmitted disease, you and your sex partner(s) should visit a health clinic, hospital or doctor for testing and treatment.
For more information and answers to common questions about Sexually Transmitted Disease, go to Frequently Asked Questions.
To find a location for testing, go to Getting Tested.
Washington State STI Epidemiological Profile
This Epidemiological Profile presents a detailed overview of recent STI trends in Washington State shown through surveillance data. This profile focuses particularly on the population demographics of people diagnosed with STIs and statewide STI case outcomes.
Please note that published numbers may slightly differ over time as further surveillance data are received or if national or local reporting guidelines are updated. While prior reports are available for reference, our most recent publications reflect the most up-to-date data available.
Washington State STI Epidemiological Profile, 2024 (PDF)
Washington State STI Epidemiological Profile, 2023 (PDF)
STI Fact Sheets
Centers for Disease Control and Prevention (CDC) offers web pages in English and Spanish with information on different sexually transmitted infections. Use the links below to learn more:
| English Fact Sheets | Spanish Fact Sheets |
|---|---|
| English Fact Sheets Bacterial Vaginosis | Spanish Fact Sheets Vaginosis Bacteriana |
| English Fact Sheets Chlamydia | Spanish Fact Sheets Clamidia |
| English Fact Sheets Gonorrhea | Spanish Fact Sheets Gonorrea |
| English Fact Sheets Genital Herpes | Spanish Fact Sheets Herpes genital |
| English Fact Sheets Human Papilloma Virus (HPV) | Spanish Fact Sheets El virus del papiloma humano genital (VPH) |
| English Fact Sheets Pelvic Inflammatory Disease (PID) | Spanish Fact Sheets Enfermedad inflamatoria pélvica |
| English Fact Sheets Lymphogranuloma Venereum (LGV) | Spanish Fact Sheets |
| English Fact Sheets Syphilis | Spanish Fact Sheets Sífilis |
| English Fact Sheets Trichomoniasis | Spanish Fact Sheets Tricomoniasis |