Washington County GIS Maps

Washington 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.

Washington County Parcels

Washington County has 10,348 mapped parcels covering 933,456 acres. The median assessed value is $95,138. The median lot size is 12.86 acres. 5,381 parcels are 10 acres or larger. The records carry 4,519 distinct owner names. About 9% of parcels list an owner mailing address outside Idaho. Owner names, mailing addresses, assessed values and lot sizes are on nearly every parcel. Browse the interactive Washington County Parcel viewer here.

Washington County Parcel Data Coverage

Field coverage measured across all Washington County parcel records. Download free sample data here.

Washington County Population

Washington County had 10,500 residents in 2020. That was 3% higher than in 2010. Washington County added 523 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 7 people per square mile. Some of the county's most populated postal areas include Weiser, Cambridge and Midvale.

Population Trend in Washington County ID

Washington County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.

Washington County Zip Codes

Washington County has 3 zip codes. Some of the county's most populated zip codes include Weiser (83672), Cambridge (83610) and Midvale (83645). Weiser is the largest zip by population, with about 8,892 residents or 85% of the county total. Together, the three largest zips account for about 100% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Washington County ID

Washington County Zip Code populations and trends per most recent census data.

Washington County Demographics

Washington County has a median age of 44.6, which makes the county a little older than Idaho overall. About 22.5% of residents are under 18, while 25.7% 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 25.7% of the population, which points to a solid working-age base. About 19% of adults have a bachelor's degree or higher, above the statewide figure of 31.2%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.

Key Demographics for Washington County ID

Washington County School Districts

Washington County is served by 4 public school districts with 3,022 students enrolled in 2024. The largest districts on the county map are Weiser 431, Payette Joint 371 and Cambridge Joint 432. Those three districts account for about 95% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.

Largest School Districts by Enrollment in Washington County ID

Washington County school district enrollment and trends per most recent NCES reporting data.

Washington County Housing & Real Estate

Washington County has a median home value of $250,300 and a median gross rent of $919. About 73% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Idaho median, while rents come in below the state average. In March 2026, the median listing price was $479,170 and homes spent about 65 days on the market.

Businesses in Washington County, ID

Washington County has 488 business listings across 225 categories. The largest categories in Washington County business listings are Churches & Religious Organizations (17, 3.5%), Farm (10, 2.0%), and Landmark And Historical Building (10, 2.0%). The full Washington County business listings dataset includes names, categories, addresses and contact details where available. Washington County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Washington County, ID

Washington County Business Listings

Washington County business listings sourced from Overture Maps. Includes locations with a high level of confidence.

Washington County Basemaps

Washington 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.

Preview a Live Package Demo

See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from Idaho — explore the full structure before you buy.