Local spider information

Spider control in California

Learn what to look for around your property, explore your city, and ask about an inspection or a quote.

Spiders in California: what to know

Around California

Conditions vary across the state. Choose your city below, then describe what’s happening around your home or business.

What to note

Where you see spiders, how long it has been going on, and anything you’ve already tried are the most useful details to mention.

A useful next step

Ask about an inspection, what treatment would involve, and whether follow-up visits are included. You don’t need to identify the problem yourself before getting in touch.

Local research

Spiders in California: what the public record shows

Before you compare quotes, it helps to know which spiders actually live in California, when they are busiest, and what the state figures look like. Everything below links to the agency or university page it came from.

the brown recluse spider has NEVER established breeding populations in California!

Brown recluse in California

Necrotic wounds in California are almost never recluse bites.

UC Riverside Spider Research

about 20,000 spiders have been turned in by concerned Californians and none have been brown recluses

Spiders submitted by Californians identified as brown recluse

Identification before treatment saves money and worry.

UC Riverside Spider Research

Spider species recorded in California

Western black widow (Latrodectus hesperus) — 'The black widow spider, Latrodectus hesperus, is the most common harmful spider in California' and 'occur in most parts of California' (UC IPM); 'common in Colorado' (CSU); Lat…
Yellow sac spider (Cheiracanthium spp.) — 'Can be seen running on walls and ceilings at night'; bites happen when 'trapped against a person's skin in clothing or bedding' (UC IPM). One of two spiders of medical signific…
Desert recluse (Loxosceles deserta) — California's 'south eastern deserts are home to several related native species such as the desert recluse spider'; the brown recluse itself has 'NEVER established breeding popul…

When spiders are busiest in California

Black widows 'occur in most parts of California' and are the main spider that can cause serious injury (UC IPM); widow bites concentrate in summer months.

'In California, the main spider that can cause serious injury is the black widow' (UC IPM). 'While the brown recluse has occasionally been brought into California in household furnishings, firewood, and motor vehicles, there are no breeding populations in the state.'

Rules that apply in California

California Structural Pest Control Board

For context, nationally

Throughout North America, but are most common in the southern and western United States — Black widow distribution. CDC/NIOSH
In the midwestern and southern United States — Brown recluse distribution. CDC/NIOSH

Sources: Brown Recluse Spiders? Not in California!; UC Riverside Spider Research; CDC/NIOSH; Pest Notes: Spiders (PN 7442). Figures are quoted as the source prints them. How we check our sources

Explore California cities

Anaheim

Mediterranean · urban setting

Spider control in California

Spiders in California: what to know

Around California

What to note

A useful next step

Spiders in California: what the public record shows

Spider species recorded in California

When spiders are busiest in California

Rules that apply in California

For context, nationally

Explore California cities

Anaheim

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Moreno Valley

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Ask about spider control in California