Blog · October 17, 2026 · Wyoming
Reading the Mills Plat Map for a lot
Lots in Mills trace back to recorded plats filed with the county.
Main page: Natrona County, WY GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Trying to understand lot lines near Edgerton? Start with the Mills plat map, as it records the lot layout that deeds refer to. What this Mills guide covers: where plats are filed, how a plat differs from a parcel map, and the details that matter to buyers.
Getting started with the Mills plat map
For a subdivision near Evansville, the deed or parcel record often names the subdivision and plat reference; bring that to the recorder's office or its online index.
Pulling up a parcel
Go first to the Natrona County ArcGIS parcel map; it covers every assessed parcel from Bar Nunn to Evansville. Closer to Edgerton, enter a street address, an owner's name or a parcel number, and the matching parcel lights up. If you're looking near Evansville, the record panel typically gives the owner of record, assessed acreage, the parcel number and sometimes recent sales.
Where the recorded documents are
The map is an index, not the title: deeds, subdivision plats and easements covering ground around Evansville are filed with the County Clerk. For a tract near Casper, have ready the instrument number listed on the parcel record so staff can find the deed fast.
Mills and the county around it
Mills is part of Natrona County, Wyoming, so its parcels are on the county's map. If you're looking near Casper, the municipality handles matters such as zoning, permits and utilities inside its limits, and the county still keeps the parcel and deed records. Lots just outside the town limits toward Evansville generally follows county rules rather than the town's.
Two different maps
The tax map on the Natrona County ArcGIS parcel map is a summary, whereas the plat carries surveyed dimensions.
When a parcel crosses a boundary
Natrona County meets Carbon County, Converse County, Fremont County, Johnson County, and Washakie County; every one of them runs a separate parcel map. Ground near Bar Nunn that runs to the line may be split across two assessors' files, so open the neighboring map before you assume the acreage. Our state page lists every bordering county map across Wyoming.
Getting your bearings
Casper holds the county offices, where most land records are kept. Smaller places on the map include Bar Nunn, Evansville, and Edgerton. Around 79,941 people live in Natrona County (Census estimate, 2023) on roughly 5,341 square miles. Landmarks such as Medicine Bow National Forest are easy to spot when you zoom out from Midwest.
What a plat shows
Recorded easements around Casper can block a shed or pool; read the notes on the sheet.
Reading the legal description
Wyoming follows the Public Land Survey System, which means a tract near Casper is described by section, township and range. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though corrections make some sections near Bar Nunn odd-sized. Write down the legal description for the tract near Bar Nunn before you request a deed or survey.
Before you lean on the lines
Tax maps are drawn for assessment, not measured on the ground, so a tree line near Bar Nunn may sit some distance off the line on screen. Owner names and values update on a schedule, so a fresh transfer around Bar Nunn might lag behind.
Getting answers from the right desk
Recorded documents for a parcel near Edgerton sit in the index kept by the County Clerk, usually searchable by name or document number. Questions about what you can build around Edgerton need the planning or permitting office, depending on whether the land is inside town limits.
Online indexes and office visits
For a parcel near Evansville, many recorder offices offer an online index, otherwise call or visit with the reference; small fees are common.
Metes and bounds instead
Rural land near Evansville that was never subdivided is often described by metes and bounds or survey description; look for a recorded survey for land near Bar Nunn.
Amended plats
An amended plat may change lots around Edgerton, search the index for replats of the same subdivision; street vacations near Bar Nunn show up in the records too.
Taking the map into the field
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Midwest, so load it before you lose signal. A saved image of the lot near Evansville and its lines is a good backup.
Quick answers
How do I read lot and block in Mills?
For most people, it points to a spot on the plat for that subdivision near Evansville, so pull that plat for dimensions.
How do I split a lot in Mills?
In most cases, lot splits in Mills go through the planning office.
Are old plats online near Midwest?
Generally, older plats near Casper may be on film or paper, including older subdivisions.
What do the dashed lines on a plat mean around Evansville?
For property near Evansville, dashed lines often mark easements or building lines; read the plat notes.
Who keeps deeds for property in Mills?
For land near Bar Nunn, assessment goes to the County Assessor and deeds to the County Clerk; planning offices cover zoning near Edgerton
Open the official Natrona County, WY parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.