County · code 56031
Platte CountyWyoming
Platte County is a county in Wyoming with its seat in Wheatland, formed in 1911 from Laramie County.
- Founded1911
- County seatWheatland
- Named forNorth Platte River
- Land area2,081 sq mi + 29 sq mi water
- Population8,605 2020 Census
- Parcels mapped7,333 checked 16 October 2026
Where it is
Platte 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 Laramie County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Platte County was created from Laramie County on February 21, 1911, and was initially attached to Laramie for judicial, revenue, and elective purposes. The county was fully organized and detached from Laramie County on January 6, 1913.
- 1911Platte County created Platte created from Laramie. Platte not fully organized, attached to Laramie "for judicial, revenue and elective purposes." Technically, Platte had been created on 9 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. 7/pp. 6-7
- 1913
Land and parcels
What the maps cover in Platte
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 7,333 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 14 January 2026 · checked 16 October 2026 -
Address points Missing
No public address points layer found for Platte 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
Platte 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
Platte County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Platte County.
See your own lot on these maps
Open Platte 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 Platte County
- When was Platte County founded?
- Platte County was founded in 1911, formed from Laramie County, and named after North Platte River.
- What is the county seat of Platte County?
- The county seat of Platte County is Wheatland.
- Is there an online parcel map for Platte County?
- Yes. Wyoming Department of Revenue, Property Tax Division (statewide parcels from county assessors) publishes a parcel map of 7,333 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Platte County's boundary or name changed?
- Platte County was created in 1911 from Laramie County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Laramie County.
- Is my lot in a flood zone?
- We do not have flood maps for Platte County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby