Wyoming · FIPS 56045 · County seat: Newcastle
Weston County, WY GIS & Parcel Viewer
Use this page to reach the official county parcel map for Weston County, Wyoming. The button below opens Weston Web Viewer in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Weston County parcel map ↗
Opens crookgrowdev.maps.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Weston Web Viewer |
|---|---|
| Type | County-run map |
| Website | crookgrowdev.maps.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Newcastle |
| Population | 6,808 (2023 Census Bureau estimate) |
| Land area | 2,398 sq mi |
| FIPS code | 56045 |
Who runs this map
Weston County runs this viewer (directly or through a contracted vendor), which makes it the closest thing to the source for local parcel lines. Our October 2026 check found the map open to the public, with no account or payment needed.
Searching for a parcel, step by step
- Click the button above and wait for the Web AppBuilder viewer to load. Some counties show a terms screen first.
- Search by street address, owner or parcel ID if the search box offers those options.
- Click a lot on the map to read its attributes.
- Turn on aerial imagery from the basemap tool and use the layer list to add things like zoning or flood zones when they're published.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
The county in brief
Weston County had an estimated 6,808 residents in 2023, according to the Census Bureau. With about 2,398 square miles of land, that works out to roughly 2.8 people per square mile. That makes it number 21 out of 23 Wyoming counties by population. The county seat is Newcastle.
Nearby parcel maps
Parcels close to the edge of Weston County can fall in the next county over. Neighboring counties:
- Campbell County
- Converse County
- Crook County
- Niobrara County
- Custer County, SD
- Lawrence County, SD
- Pennington County, SD
Maps vs. surveys
Online parcel lines are drawn for tax and planning use. They can be off by several feet, so use a recorded plat or a licensed surveyor for fences, setbacks or a sale.