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When it comes to residential pest control, spiders are at the top of many people’s list of pests to eradicate. Although these eight-legged creatures help keep other pest populations in check, their frightening appearance convinces many homeowners in Washington State and Oregon to call for professional pest control. The first thing that pest control experts will tell you is that most spiders are largely harmless.
There is one medically significant species in the Pacific Northwest (PNW): the black widow and the brown widow. But even these Pacific Northwest spider species are unlikely to attack unless provoked. Even if they don’t bite often, wanting to get rid of them is understandable.
Read about the common types of Pacific Northwest spiders, where you might find them, and their behaviors.
If you're experiencing a spider problem, contact the experts at Western Exterminator.
Hobo spiders
Hobo spiders are common PNW spiders often found in basements, crawl spaces, and woodpiles. They are brown with a chevron pattern on their abdomens. While often mistaken for more dangerous and venomous species, they are not aggressive and usually avoid human contact. Keeping clutter to a minimum and sealing cracks in walls can help prevent them from entering homes.
Hobo spiders are sometimes mistaken for brown recluse spiders, though the latter isn’t native to the Pacific Northwest.
Hobo spiders are not dangerous and despite their reputation are of no medical importance to people and pets.
False black widow
The false black widow resembles the black widow but lacks the distinctive red hourglass marking. These spiders prefer dark, undisturbed areas like garages, basements, and attics. They spin irregular webs and primarily feed on insects. Regular cleaning and reducing clutter can discourage them from settling inside homes.
Orb-weaver spiders
Orb-weaver spiders include the yellow garden spider and spotted orb weaver. They are known for their large, intricate webs, which they use to catch flying insects. These spiders are typically found in gardens, forests, and around homes. They are not harmful to humans and help control insect populations. Removing webs near entry points can reduce their presence.
Wolf spiders
Wolf spiders are ground-dwelling hunters that do not spin webs. Like tarantulas, they are large and hairy. They are also known for their excellent eyesight. These spiders are commonly found in leaf litter, under rocks, or in garages. Keeping vegetation trimmed and sealing gaps around doors can help keep them out of homes.
Giant house spiders
As their name suggests, giant house spiders are large and fast-moving. They are commonly found in Washington and Oregon homes, particularly in basements and attics. These spiders prey on other insects, including smaller spiders. Ensuring proper ventilation and reducing humidity can help deter them.
Grass spiders
Grass spiders build funnel-shaped webs in grass, shrubs, and around buildings. They are often seen in gardens and yards across the Pacific Northwest. While they may look intimidating, they are not aggressive. Keeping landscaping well-maintained can help minimize their numbers near homes.
Jumping spiders
Jumping spiders belong to the family Salticidae. They are small, active hunters known for their impressive leaping ability. These spiders are often found on windowsills, walls, and outdoor surfaces. They have excellent vision and are curious but harmless to humans. Regular cleaning and sealing of small entry points can keep them outside.
Yellow sac spiders
Yellow sac spiders are pale yellow or light green and prefer to hide in small crevices during the day. They are often found in corners of rooms, ceilings, or behind furniture. While they are commonly seen indoors, they help control insect populations. Regular dusting and vacuuming can help prevent infestations.
House spiders
House spiders are one of the most common spiders found in Pacific Northwest homes. They build messy webs in corners, behind furniture, and in basements. They are harmless and help reduce other pest populations. Keeping the home clean and vacuuming regularly can help control their numbers.
For more information about the different types of spiders found in the western United States, see our separate article on the identification of spider species.
Contact Western to remove PNW spiders
If you're dealing with spiders in the Pacific Northwest, Western Exterminator can help. Our pest control experts have the knowledge and tools to identify and remove spider infestations safely.
Contact us today for expert spider removal and prevention services.
Frequently asked questions
What is the most common house spider in Washington State?
The giant house spider is the most common house spider in Washington State, often found in basements and attics.
What spiders should I worry about in Washington State?
The black widow may cause concern, but they rarely bite and are not aggressive.
What is the biggest spider in the Pacific Northwest?
It can depend on the individual, but the giant house spider is one of the biggest spiders in the Pacific Northwest, with a leg span reaching up to four inches.
Are there any poisonous spiders in the Pacific Northwest?
Most spiders of the Pacific Northwest are considered harmless, but how harmful a spider is depends on allergies to venom and many other factors. The black widow is the most dangerous in the Pacific Northwest region.
Are there brown recluse spiders in the Pacific Northwest?
Brown recluse spiders are not native to the Pacific Northwest and are rarely found in the region.