Blog · October 13, 2026 · Washington
GIS Map of Grant County, Washington
The free official GIS map for Grant County, how to search it, and what the parcel data does and doesn't tell you about owners, acreage and property lines.
Main page: Grant County, WA GIS & Parcel Viewer (official map link, Grant County facts and neighboring maps).
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Land questions in Grant County start in the same place: the official parcel map. Here's how to use the Grant County GIS map to find owners, acreage and boundary lines, and where it falls short.
This guide walks through the official link, the kinds of land you'll find around Electric City, and what to do when the map and the ground don't agree.
Who's clicking on Grant County parcels
- Small-farm and homestead buyers looking around Banks Lake South compare tract sizes and shapes on the map before calling a listing agent.
- First-time land buyers near Banks Lake South use the map to find unbuilt tracts and contact owners directly.
- Contractors quoting work near Banks Lake South check frontage and lot depth on the map before they drive out.
- Deer hunters scouting the woods between Moses Lake and Electric City use the parcel lines to see how many owners share one ridge or creek bottom.
Opening the Grant County parcel viewer
Grant County doesn't run its own public parcel site. The free option is the statewide Washington Current Parcels layer in ArcGIS Map Viewer, which includes the county's parcels. Search an address in Electric City, or pan out toward Banks Lake South and click a rural tract; either way the record pops up with owner and acreage. Our Grant County, WA page keeps the current link if the official address changes.
Getting oriented in Grant County
The county seat is Ephrata; Electric City, George, Grand Coulee, and Mattawa are among the other communities you can zoom to. Crossroads communities such as Banks Lake South, Beverly, and Cascade Valley have their own small clusters of lots. The Census Bureau puts Grant County at about 2,680 square miles of land and an estimated 102,678 people (2023). Most of the land area is agricultural or wooded, and the parcel lines get bigger and more irregular as you move away from Moses Lake. Public ground such as Columbia National Wildlife Refuge, Hanford Reach National Monument, and Lake Roosevelt National Recreation Area appears as large unbroken blocks, and the private parcels around them draw hunters and recreation buyers.
How accurate are Grant County, WA property lines?
On rural tracts near Banks Lake South, the parcel lines can drift from the fences on the ground, sometimes by more than a few feet. The section grid shapes many farm tracts around Banks Lake South; boundaries often follow quarter-section lines you can spot on the map. A survey is the only document that settles where a Grant County boundary actually runs.
Using the Grant County GIS map to find vacant land
Looking for open ground between Grand Coulee and Ephrata? Try this:
- Scan the imagery around Banks Lake South; open fields and woodlots with no driveway stand out right away.
- For each tract near Ephrata, note the parcel ID, the owner and where the tax bill is mailed.
- Size up price by comparing a few similar tracts around Grand Coulee on the assessment records.
- Trace the frontage on any tract near Banks Lake South; without it, access depends on a recorded easement.
- Rural lots near Banks Lake South may need a septic permit and a well, so ask before you commit.
Before you buy near Grand Coulee, read how to tell if land is buildable.
The Grant County economy in brief
In the 2022 County Business Patterns data, Grant County had 2,098 establishments; retail trade, construction, and accommodation and food services led the count. Compared with the nation, the county has an unusually high share of businesses in agriculture and forestry support services, hospitals, and beverage and tobacco manufacturing. For a buyer eyeing woods outside Grand Coulee, that means asking whether the timber has been sold or harvested recently. If you're comparing land near Quincy with land near Mattawa, the local job base is part of the price story.
Where Grant County deeds and plats are kept
For land near Ephrata, the parcel record is the index; the recorded deed is the source. Recording offices go by different titles from state to state, including register of deeds, recorder, county clerk and clerk of court; the official Grant County website names the one that handles deeds. Copy the parcel ID and legal description before you call or visit; recording staff can find a Grant County document much faster with them.
Near the county line
If your land is near the edge, check the next county over too: Adams County, Benton County, Douglas County, Franklin County, and Kittitas County border Grant County. All of them are listed on our Washington page.
Grant County parcel map FAQ
How can I tell who owns land near Moses Lake?
Click the parcel. Grant County tax records show the owner of record and usually a mailing address, which may differ from the property address.
Does the Grant County parcel map show zoning or flood zones?
Look in the layer list of the Washington Current Parcels layer in ArcGIS Map Viewer. If there's no flood layer, FEMA's flood map service covers Grant County.
What is the county seat of Grant County, Washington?
Ephrata is the county seat.
How do I find property lines in Grant County, Washington?
On rural land near Banks Lake South, the parcel map gives a rough outline, the deed gives the calls, and a Washington surveyor finds the corners.
How accurate is the Grant County GIS acreage?
For older rural tracts near Banks Lake South, the GIS acreage can be off; get a survey if acreage drives the price.
Why is a recent Grant County, WA sale missing from the map?
The Grant County parcel data updates ownership after deeds are recorded and processed, so recent sales take time to appear.
Open the official Grant County, WA parcel map Grant County 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.