County · code 56027
Niobrara CountyWyoming
Niobrara County is a county in Wyoming with its seat in Lusk. It was created on February 21, 1911, and named after the Niobrara River.
- Founded1911
- County seatLusk
- Named forNiobrara River
- Land area2,626 sq mi + 1.9 sq mi water
- Population2,467 2020 Census
- Parcels mapped3,806 checked 15 October 2026
Where it is
Niobrara on the map of Wyoming
Wyoming has 23 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1911 from Converse County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Niobrara County was created from Converse County but initially remained attached to Converse for judicial, revenue, and election purposes. The county was fully organized and detached from Converse on January 8, 1913.
- 1911Niobrara County created Niobrara created from Converse. Niobrara not fully organized, attached to Converse "for judicial, revenue and election purposes." Technically, Niobrara had been created on 14 February 1911, but the several boundary laws of February 1911 were not passed in the intended sequence and mapping them in strict chronological order is not practical. By treating the law of 21 February as the basic structure that the other laws modify, the mapping reflects the intent of the legislature. · Wyo. Laws 1911, 11th leg., ch. 20/pp. 23-24
- 1913
Land and parcels
What the maps cover in Niobrara
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 3,806 parcels from Wyoming Department of Revenue, Property Tax Division (statewide parcels from county assessors). Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 10 June 2026 · checked 15 October 2026 -
Address points Missing
No public address points layer found for Niobrara County yet.
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Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Niobrara by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Who to ask before you build, dig or sell
Official county pages only. We link to them; we do not copy them, because they change.
Records
County government
- County government
The official website of Niobrara County.
See your own lot on these maps
Open Niobrara County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Niobrara County
- When was Niobrara County founded?
- Niobrara County was founded in 1911, formed from Converse County, and named after Niobrara River.
- What is the county seat of Niobrara County?
- The county seat of Niobrara County is Lusk.
- Is there an online parcel map for Niobrara County?
- Yes. Wyoming Department of Revenue, Property Tax Division (statewide parcels from county assessors) publishes a parcel map of 3,806 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Niobrara County's boundary or name changed?
- Niobrara County was created in 1911 from Converse County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Converse County.
- Is my lot in a flood zone?
- We do not have flood maps for Niobrara County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby