Grant County GIS Maps
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Grant County, Washington, has 99,123 residents across 58,222 parcels and covers 2,679.5 square miles. The population grew 11.2% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Grant County is 53025.
Moses Lake is the county's largest population center. Grant County also includes 14 zip codes, 13 public school districts and 25 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
Grant County Trends
- Population
- 99,123▴
- Median Home Value
- $275,700▴
- K-12 Enrollment
- 26,163▾
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Grant County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Grant County Parcels
Grant County has 58,222 mapped parcels covering 1,736,435 acres. The median assessed value is $50,000. Assessed values are on nearly every parcel. Site addresses reach 68.9%. Browse the interactive Grant County Parcel viewer here.
Grant County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 58,222 | 100% |
| Owner name | 0 | 0% |
| Owner mailing address | 0 | 0% |
| Site address | 40,108 | 68.9% |
| Land use code | 58,196 | 99.9% |
| Land use description | 0 | 0% |
| Assessed value | 57,114 | 98.1% |
| Land value | 58,196 | 99.9% |
| Improvement value | 58,196 | 99.9% |
| Acreage | 0 | 0% |
| Parcel boundary | 58,222 | 100% |
| Download all Grant County parcels. | ||
Field coverage measured across all Grant County parcel records.
Grant County Population
Grant County had 99,123 residents in 2020. That was 11.2% higher than in 2010. Grant County added 24,425 people between 2000 and 2020, which points to steady long-term growth. Moses Lake is the largest city in the county, but it accounts for only about 25% of the total population. The county is fairly spread out, with about 37 people per square mile. Some of the county's most populated postal areas include Moses Lake, Quincy and Ephrata.
Population Trend in Grant County WA
Grant County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Grant County Zip Codes
Grant County has 14 zip codes. Some of the county's most populated zip codes include Moses Lake (98837), Quincy (98848) and Ephrata (98823). Moses Lake is the largest zip by population, with about 46,262 residents or 47% of the county total. Together, the three largest zips account for about 73% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Grant County WA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 98837 | Moses Lake | 46,262 | ▴ 16.5% |
| 98848 | Quincy | 13,392 | ▴ 16.3% |
| 98823 | Ephrata | 12,393 | ▴ 12.1% |
| 99349 | Royal City | 7,960 | ▾ -6.2% |
| 98851 | Soap Lake | 4,472 | ▴ 11.4% |
| Download all zip code data | |||
Grant County Zip Code populations and trends per most recent census data.
Grant County Demographics
Grant County has a median age of 33.5, which makes the county a little younger than Washington overall. About 28.8% of residents are under 18, while 14.3% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 31.3% of the population, which points to a solid working-age base. About 18.2% of adults have a bachelor's degree or higher, above the statewide figure of 38.8%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.
Key Demographics for Grant County WA
Median Age
33.5
Under 18
28.8%
Age 65+
14.3%
Bachelor's+
18.2%
Grant County School Districts
Grant County is served by 13 public school districts with 26,163 students enrolled in 2024. The largest districts on the county map are Moses Lake, Othello and Quincy. Those three districts account for about 62% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.
Largest School Districts by Enrollment in Grant County WA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Moses Lake School District | 8,430 | 32.2% | ▾ -3.5% |
| Othello School District | 4,654 | 17.8% | ▾ -1.2% |
| Quincy School District | 3,162 | 12.1% | ▾ -1.2% |
| Ephrata School District | 2,833 | 10.8% | ▾ -0.7% |
| Wahluke School District | 2,455 | 9.4% | ▾ -1.1% |
| Download all school district data | |||
Grant County school district enrollment and trends per most recent NCES reporting data.
Grant County Housing & Real Estate
Grant County has a median home value of $275,700 and a median gross rent of $1,059. About 66% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Washington median, while rents come in below the state average. In March 2026, the median listing price was $424,500 and homes spent about 66 days on the market.
Grant County Housing Mix
Grant County housing mix: owner, renter and vacant units.
Grant County Housing Trends
Grant County median home value and rent trend (last 5 years).
Businesses in Grant County, WA
Grant County has 3,538 business listings across 579 categories. The largest categories in Grant County business listings are Churches & Religious Organizations (97, 2.7%), Gas Stations (81, 2.3%), and Mexican Restaurants (61, 1.7%). The full Grant County business listings dataset includes names, categories, addresses and contact details where available. Grant County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Grant County, WA
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 97 | 2.7% |
| Gas Stations | 81 | 2.3% |
| Mexican Restaurants | 61 | 1.7% |
| Lake | 58 | 1.6% |
| Parks & Recreation | 56 | 1.6% |
| Farm | 56 | 1.6% |
| Beauty Salons | 53 | 1.5% |
| Landmark And Historical Building | 48 | 1.4% |
| Coffee Shops | 46 | 1.3% |
| Restaurants | 45 | 1.3% |
Grant County Business Listings
| Business | Category | City |
|---|---|---|
| New Start Clinics | Abuse And Addiction Treatment | Moses Lake |
| The Vintage | Accommodation | Moses Lake |
| Speedy's Multi Services | Accountant | Mattawa |
| Mattawa Fitness Club | Active Life | Mattawa |
| Nickel Saver | Advertising Agency | Moses Lake |
| Washington Grown | Agricultural Cooperatives | Moses Lake |
| Sanders livestock | Agricultural Production | Moses Lake |
| Kooy's Irrigation | Agricultural Service | Quincy |
| Simplot Grower Solutions | Agriculture | Moses Lake |
| Wagner Seed Company | Agriculture Association | Warden |
| Download Grant County business listings | ||
Grant County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Grant County Basemaps
Grant County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Grant County Data Package
This page shows a preview of what's included in the Grant County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for parcels, zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Grant County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.