On this page Which spiders can hurt you The one spider When they are active If you are bitten or stung What official sources say About this list Sources
This page lists 1 spider .
1 is venomous by official accounts.
Not every species: no complete official list of North Dakota spiders exists, so this page covers the ones state and Extension sources name. How lists are built .
Which spiders can hurt you Official sources single out these spiders in North Dakota, in their own words:
The one spider on the list Venomous species first, then A to Z. Do not handle them.
No confirmed photo of Black widow spider Black widow spider Venomous per CDC / NIOSH
Danger to people “Rattlesnakes and black widow spiders often live in prairie dog burrows.” National Park Service, Theodore Roosevelt National Park Where in North Dakota Theodore Roosevelt National Park (western North Dakota badlands), per NPS National Park Service, Theodore Roosevelt National Park What the sources say Venom: “Black widows and brown recluses are two types of venomous spiders in the United States.” (CDC / NIOSH)
Habitat: Often in prairie dog burrows (NPS) (National Park Service, Theodore Roosevelt National Park)
When spiders are active in North Dakota Records of spiders in North Dakota peak in July to September. They show when people record spiders, not how many there are (about month bars ).
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
88 records of spiders in North Dakota by month (GBIF, CC0 and CC BY records). If you are bitten or stung Call 911 or Poison Help at 1-800-222-1222 right away. Poison Help connects you to your local poison center, any time of day.
Official advice from National Park Service, Theodore Roosevelt National Park:
What official sources say Are there black widow spiders in North Dakota? Yes. NPS says rattlesnakes and black widow spiders often live in prairie dog burrows in Theodore Roosevelt National Park. National Park Service, Theodore Roosevelt National Park
“Rattlesnakes and black widow spiders often live in prairie dog burrows.” About this list Venom labels come only from official sources and link to them; "Not stated" never means harmless. How labels work .
Sources Contact Us . North Dakota Game and Fish Department. undated page; checked November 3, 2026. Safety - Theodore Roosevelt National Park . National Park Service, Theodore Roosevelt National Park. undated page; checked November 3, 2026. Quoted passages (2) “Rattlesnakes and black widow spiders often live in prairie dog burrows.” “Be alert while walking, and do not put your hands or feet in a place you cannot see.” Venomous Spiders at Work . CDC / NIOSH. archived copy, captured October 6, 2026; checked November 3, 2026. Quoted passages (1) “Black widows and brown recluses are two types of venomous spiders in the United States.” GBIF.org occurrence records, human observations licensed CC0 1.0 or CC BY 4.0 only, accessed November 3, 2026. The datasets behind these counts are listed on our Sources page.