Are there poisonous spiders in Washington State? Nearly all spiders are venomous to some extent, yet very few are harmful to people. There are two spiders of medical significance in Washington, the black widow spider and the yellow sac spider.
What kind of spiders live in Washington State? The most common spiders in Washington State are giant house spiders, jumping spiders and orb weavers.
What is the largest spider in Washington State? The giant house spider, Eratigena atrica (formally known as Tegenaria gigantea and T. duellica), is commonly found in and around Washington homes west of the Cascade Mountains.
What is the most venomous spider in Washington State? Black Widows are the most venomous spider in Washington!
In addition, they are probably the most popular and recognizable spider in the world. Almost everyone can recognize the red-shaped hourglass mark that appears on the females.