Are ticks a problem in San Francisco?

There have been 27 tick reports near San Francisco, CA, with 0 bites and 27 sightings. The most common species reported is the Unidentified. Check the Tick Map for the latest 2026 tick activity.

What kind of ticks are in San Francisco?

The most commonly reported tick species in San Francisco include Unidentified, Deer Tick. Each species carries different disease risks — see our species guide for identification help.

Tick Map

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Ticks in San Francisco, CA

27 tick reports from the San Francisco, CA area.

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Total Reports

Sightings

Bites

Species Found in San Francisco

Unidentified26 (96%)

Deer Tick1 (4%)

Risk: High — carries Lyme disease

Tick Safety in San Francisco

Ticks are active in San Francisco, CA and surrounding areas. The most commonly reported species is the Unidentified, making up 96% of reports.

✓Wear light-colored clothing when walking in wooded areas or tall grass
✓Use EPA-registered tick repellent (DEET, picaridin, or IR3535)
✓Do a full-body tick check after being outdoors — especially behind ears, hairline, and waistband
✓Shower within 2 hours of coming inside
✓If bitten, remove the tick with fine-tipped tweezers and monitor for symptoms for 30 days