Public clinic anchor
Need testing plus treatment?
Start with the Harborview Sexual Health Clinic if you need testing, treatment, symptom evaluation, DoxyPEP, hepatitis C treatment, or PrEP support.
See Seattle clinic optionsDaily city guide
Free, Low-Cost & Private STD Testing in Seattle, WA
Looking for STD testing in Seattle? Start by comparing Public Health Seattle & King County’s Sexual Health Clinic at Harborview, Seattle’s LGBTQ+ Center/Gay City, Washington DOH HIV testing resources, private lab testing, and HIV-focused at-home test options.
Harborview is a major public sexual-health clinic for Seattle, with appointments and walk-ins for STI/HIV testing and treatment. Gay City adds free HIV/STI screening for clients age 14+ regardless of insurance status, while Washington DOH can help users find free or reduced-cost HIV testing and, when available, HIV self-tests through community programs.
Source-checked city guide
Written by
STD Test Options Editorial Team
Editorial review
Editorially reviewed against official public-health, clinic, and provider sources where available.
Sources checked
4 source listings and 3 clinic/resource listings. Availability, cost, hours, and appointment rules can change.
Medical review
Not medically reviewed. This guide is informational and is not medical advice.
Quick answer: Where should you get STD testing in Seattle?
In Seattle, the best starting point depends on what matters most:
- Testing plus treatment: Start with Public Health Seattle & King County’s Sexual Health Clinic at Harborview for STI/HIV testing, treatment, symptom or exposure evaluation, DoxyPEP, hepatitis C treatment, and PrEP support.
- Free nonprofit screening: Seattle’s LGBTQ+ Center/Gay City lists free HIV rapid testing and STI screening for clients age 14+ regardless of insurance status, with appointment hours Tuesday through Saturday.
- Walk-in planning: Harborview says walk-ins are accepted until 4 pm but may close earlier depending on staffing and clinic flow, so call ahead if same-day access matters.
- At-home HIV screening: Washington DOH notes HIV self-test kits may be available through community programs based on eligibility and availability; this route is more limited than a full clinic visit.
- Recent HIV exposure: Do not wait for a routine testing appointment if you may need PEP. Use urgent medical care within 72 hours of exposure.
Free or low-cost clinics in Seattle
These listings are starting points, not guarantees of availability or price. Call before visiting because hours, eligibility, walk-in availability, and fees can change.
| Clinic | Address | Tests listed | Cost / eligibility | Appointment | Last checked |
|---|---|---|---|---|---|
| Public Health Sexual Health Clinic at Harborview Medical Center | 908 Jefferson St., 11th Floor, Seattle, WA 98104 | County and clinic pages list HIV and STI testing and treatment, evaluation for STI symptoms or exposure, hepatitis C treatment, vaccines, HIV care referral, PrEP scheduling, and DoxyPEP through clinician visits. | Harborview public pages do not publish a simple full price table. Ask the clinic about current charges, insurance handling, and any financial-assistance or reduced-cost options before you go. | Phone 206-744-3590; PrEP line 206-744-3954. Hours listed by UW Medicine: Mon/Wed/Thu/Fri 7:30 am–6 pm, Tue 9:30 am–6 pm. Walk-ins are accepted until 4 pm but may close earlier depending on staffing and clinic flow. | 2026-06-02 |
| Seattle’s LGBTQ+ Center / Gay City Wellness | 400 E Pine St., Suite 100, Seattle, WA 98122 | Gay City lists rapid HIV finger-poke testing and STI screening for syphilis, chlamydia, gonorrhea, and hepatitis C, plus PrEP navigation and online results. | Gay City says all services are free for clients age 14+ regardless of insurance status. | Phone 206-860-6969. Appointment hours: Tue 1–6 pm, Wed–Fri 10 am–6 pm, Sat 9 am–5 pm. Booking ahead is recommended for priority and shorter waits. | 2026-06-02 |
| Washington DOH-supported HIV testing and self-test resources | Seattle and King County community testing organizations; home HIV self-tests may depend on eligibility and availability | Washington DOH says community programs may offer rapid HIV testing, lab-based HIV testing, and HIV self-test kits; some local organizations may also list other STI screening separately. | DOH says many organizations offer HIV testing and counseling for free or at reduced cost for people without insurance, a provider, or ability to pay. | Use the DOH testing resources and call the organization before relying on walk-in access or self-test availability. Choose in-person care for symptoms, exposure treatment, or broader STI testing. | 2026-06-02 |
When a private lab option may make more sense in Seattle
Seattle has credible public and free nonprofit testing paths, so private lab testing is usually not the cheapest option. It can still be worth comparing if you:
- want to order online before visiting a lab;
- prefer upfront self-pay pricing instead of public clinic registration or nonprofit intake;
- want a testing path outside Harborview, Gay City, or other community programs;
- want more privacy around billing, while understanding that privacy is not the same as guaranteed anonymity.
Paid option. Not a substitute for medical care if you have symptoms, need treatment, need site-specific testing, or may need urgent HIV prevention medication.
Public clinic vs private lab vs at-home STD testing in Seattle
| Option | Best for | Pros | Trade-offs | Next step |
|---|---|---|---|---|
| Harborview Sexual Health Clinic | Public clinic STI/HIV testing, treatment, PrEP, DoxyPEP, and symptom evaluation | Official Seattle-King County public-health clinic with appointments and walk-ins, plus treatment, PrEP, DoxyPEP, and symptom evaluation in one place | Walk-ins can close before 4 pm if capacity is limited, and the public pages do not publish a simple full price table for every test | See Harborview details |
| Seattle’s LGBTQ+ Center / Gay City | Free HIV/STI screening, PrEP navigation, and LGBTQ+ community support | Free services for clients age 14+ regardless of insurance status; HIV, syphilis, chlamydia, gonorrhea, and hepatitis C screening listed | Book ahead for priority; STI testing is confidential rather than anonymous under the provider’s policy language | See Gay City details |
| Washington DOH HIV resources | HIV-focused home screening or finding free/reduced-cost community testing | DOH notes many organizations offer free or reduced-cost HIV testing and some HIV self-test kits based on eligibility and availability | Self-test availability is not guaranteed and may be HIV-only; use clinic care for symptoms, treatment, or broader STI testing | Compare home kit options |
| Private lab | Self-pay privacy, online ordering, and scheduling flexibility | Useful when you want a paid path outside public clinic and nonprofit workflows | Paid out of pocket; lab visit still required; not a treatment clinic | Check private prices |
Harborview Sexual Health Clinic
Best for: Public clinic STI/HIV testing, treatment, PrEP, DoxyPEP, and symptom evaluation
Pros: Official Seattle-King County public-health clinic with appointments and walk-ins, plus treatment, PrEP, DoxyPEP, and symptom evaluation in one place
Trade-offs: Walk-ins can close before 4 pm if capacity is limited, and the public pages do not publish a simple full price table for every test
See Harborview detailsSeattle’s LGBTQ+ Center / Gay City
Best for: Free HIV/STI screening, PrEP navigation, and LGBTQ+ community support
Pros: Free services for clients age 14+ regardless of insurance status; HIV, syphilis, chlamydia, gonorrhea, and hepatitis C screening listed
Trade-offs: Book ahead for priority; STI testing is confidential rather than anonymous under the provider’s policy language
See Gay City detailsWashington DOH HIV resources
Best for: HIV-focused home screening or finding free/reduced-cost community testing
Pros: DOH notes many organizations offer free or reduced-cost HIV testing and some HIV self-test kits based on eligibility and availability
Trade-offs: Self-test availability is not guaranteed and may be HIV-only; use clinic care for symptoms, treatment, or broader STI testing
Compare home kit optionsPrivate lab
Best for: Self-pay privacy, online ordering, and scheduling flexibility
Pros: Useful when you want a paid path outside public clinic and nonprofit workflows
Trade-offs: Paid out of pocket; lab visit still required; not a treatment clinic
Check private pricesHow much does STD testing cost in Seattle?
Harborview’s county and clinic pages describe confidential HIV/STD testing, screening, treatment, and counseling, with public-health and clinical follow-up in one setting. The Harborview clinic pages emphasize appointments, walk-ins, treatment, and visit types, but they do not publish a simple full price table for every test, so call ahead if cost is the deciding factor.
- Harborview Sexual Health Clinic: is the first public clinic to check if you need both testing and treatment; call ahead to confirm current fees and same-day availability.
- Gay City: lists free HIV rapid testing and STI screening for clients age 14+ regardless of insurance status.
- Washington DOH resources: can help locate free or reduced-cost HIV testing and some HIV self-tests, but not every option covers the full range of STIs.
- Private lab testing: usually uses upfront self-pay pricing and may fit users who do not want public clinic or nonprofit workflows.
Gay City says all services are free for clients age 14+ regardless of insurance status. Washington DOH says many organizations offer HIV testing for free or reduced cost and that some HIV self-test kits may be available through community programs depending on eligibility and supply.
Seattle testing notes: Harborview walk-ins, Gay City privacy, and when not to wait
Public Health Seattle & King County’s Sexual Health Clinic is at Harborview Medical Center, 908 Jefferson Street, 11th Floor. The clinic lists appointments and walk-ins for STI/HIV testing and treatment; walk-ins are accepted until 4 pm but may close earlier depending on staffing and clinic flow. Nurse visits fit asymptomatic testing, while clinician visits are used for symptoms, STI exposure, treatment, DoxyPEP, or hepatitis C treatment.
Seattle’s LGBTQ+ Center/Gay City lists free services for clients age 14+ regardless of insurance status, with HIV rapid testing and STI screening for syphilis, chlamydia, gonorrhea, and hepatitis C. Its page recommends booking ahead for priority and states that STI testing is confidential rather than anonymous.
At-home options in Seattle are strongest for HIV screening. Use Harborview, Gay City, or another healthcare provider instead of routine home testing if you have genital sores, pelvic pain, testicular pain, fever, a concerning rash, a recent exposure that may require treatment, or possible HIV exposure where PEP timing matters within 72 hours.
Why Harborview is the first public clinic to check
Harborview is the clearest public-clinic anchor for Seattle because county and clinic sources list STI/HIV testing and treatment, symptom and exposure evaluation, PrEP, DoxyPEP, hepatitis C treatment, and walk-ins. It also publishes practical caveats: walk-ins stop at 4 pm and may close earlier, and same-day clinician care is a better fit for symptoms or known exposures than routine asymptomatic screening.
How Gay City changes the low-cost decision
Gay City lists free HIV rapid testing and STI screening for clients age 14+ regardless of insurance status, with appointment hours Tuesday through Saturday. It is a strong Seattle option when free screening, LGBTQ+ affirming navigation, or PrEP support matters more than getting treatment at the same visit.
When at-home HIV testing helps and when Seattle users need clinic care
Washington DOH-supported self-test pathways can help when HIV screening at home is the goal, but availability and kit type depend on eligibility and local supply. Home HIV testing does not replace Harborview, Gay City, or another healthcare provider for symptoms, treatment, site-specific STI testing, pregnancy-related care, or urgent PEP evaluation within 72 hours.
What STD test do you need?
Not sure what to test for? Use our private STD Test Finder.
Use the STD Test FinderNo email required. Answers are not submitted to our server.
When to speak with a healthcare provider
Consider contacting a healthcare provider promptly if you have symptoms, are pregnant, had a known exposure, need throat or rectal testing, or are unsure which test is right for you.
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Free STD testing in San FranciscoFAQ
Where can I get low-cost STD testing in Seattle?
Start with Public Health Seattle & King County’s Sexual Health Clinic at Harborview if you want a public clinic that can test, evaluate symptoms, and treat in one place. The public pages do not post a simple full price table, so call 206-744-3590 to ask about current charges, insurance handling, and reduced-cost options before you go.
Does Harborview accept walk-ins for STD testing?
Yes. Harborview says walk-ins are accepted until 4 pm, but it also warns that walk-ins may close earlier depending on staffing and clinic flow. Scheduled nurse visits are for asymptomatic testing, while clinician visits are used for symptoms, exposure concerns, treatment, DoxyPEP, or hepatitis C treatment.
Where can I get free HIV/STI testing in Seattle?
Seattle’s LGBTQ+ Center/Gay City lists free HIV rapid testing and STI screening for syphilis, chlamydia, gonorrhea, and hepatitis C for clients age 14+ regardless of insurance status.
Can I get an at-home STD test in Seattle?
Seattle’s clearest home-testing path is HIV-focused. Washington DOH says some community programs may offer HIV self-test kits based on eligibility and availability. Use a clinic if you need chlamydia, gonorrhea, syphilis, treatment, site-specific testing, or help interpreting symptoms.
Is Gay City testing anonymous?
Gay City says STI testing is confidential, not anonymous. If privacy is a major concern, ask how results are shared, whether insurance is billed, and how follow-up is handled before your visit.
How do I get PrEP or PEP help in Seattle?
Harborview lists PrEP scheduling at 206-744-3954 and PrEP-related visits, while Gay City offers PrEP navigation. If you may have been exposed to HIV within the last 72 hours, use urgent medical care and ask about PEP rather than waiting for a routine testing slot.
Is private STD testing worth it in Seattle if Harborview and Gay City are available?
It can be if you want online ordering, upfront self-pay pricing, scheduling flexibility, or a path outside public clinic and nonprofit workflows. If cost, treatment, or follow-up care matters most, start with Harborview, Gay City, or another healthcare provider.
Is private STD testing worth it in Seattle if free clinics are available?
It can be. Free clinics may be the best choice if cost, treatment access, or public health follow-up matters most. Private lab testing may be worth comparing if you want online ordering, upfront self-pay pricing, scheduling flexibility, or a testing path outside a public clinic setting.
Can I get STD testing in Seattle without using insurance?
Often, yes. Some public or community clinics may not require insurance, and private lab testing is often paid out of pocket with upfront pricing. If avoiding insurance billing is important to you, compare self-pay private lab options before choosing where to test.
Sources and methodology
- King County Sexual Health Clinic at Harborview — Public Health Seattle & King County
- UW Medicine Sexual Health Clinic at Harborview — UW Medicine
- Seattle’s LGBTQ+ Center / Gay City Wellness — Seattle’s LGBTQ+ Center
- Washington DOH HIV testing resources — Washington State Department of Health