Sexually Transmitted Disease (STD)

Sexually Transmitted Diseases (STD) are the most commonly reported diseases in Washington State. Many are curable, others are treatable, all are preventable. Most people with STDs don't have obvious symptoms, but without treatment they can spread disease and possibly develop serious complications. Our STD program staff can help answer questions.

COVID-19 for Providers l Alerts l Data l Cases and Rates l Fact Sheets


Health Care Providers Alerts

2020 Washington State STI Data*




Primary and Secondary



(Males and Females)

Rate: 410.4 per 100,000
# of cases: 31,423
# of cases in 2019: 37,641

Rate: 151.3 per 100,000
# of cases: 11,580
# of cases in 2019: 11,848

Rate: 10.9 per 100,000
# of cases: 837
# of cases in 2019: 830

# of cases: 10
# of cases in 2019: 17


Rate: 303.0
# of cases: 11,578
# of cases in 2019: 14,314

Rate: 186.1
# of cases: 7,111
# of cases in 2019: 7,615

Rate: 17.5
# of cases: 670
# of cases in 2019: 707



Rate: 514.1
# of cases: 19,718
# of cases in 2019: 23,273

Rate: 115.7
# of cases: 4,436
# of cases in 2019: 4,224

Rate: 4.2
# of cases: 162
# of cases in 2019: 120



*Note: Washington State STI data may differ from CDC STI data as additional information is gathered over time.

Data source: PHIMS-STD 6/1/2021, WELRS

Data source: PHIMS-STD 6/1/2021

STI Cases and rates by county, Washington State

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)

Sexually Transmitted Infection Cases and Rates by County, 2016 (PDF)

CDC Sexually Transmitted Disease Surveillance 2018 (PDF)

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.

STD Fact Sheets

Centers for Disease Control and Prevention (CDC) offers fact sheet web pages in English and Spanish with information on different sexually transmitted diseases. Use the links below to go to the fact sheets.

DOH Office of Infectious Disease Syndemic Reports

HIV/AIDS & Family Planning