Island County GIS Maps

Island 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.

Island County Parcels

Island County has 52,348 mapped parcels. The median assessed value is $497,811. Assessed values are on nearly every parcel. Site addresses reach 79.3%. Browse the interactive Island County Parcel viewer here.

Island County Parcel Data Coverage

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

Island County Population

Island County had 86,857 residents in 2020. That was 10.6% higher than in 2010. Island County added 15,299 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 417 people per square mile. Some of the county's most populated postal areas include Oak Harbor, Stanwood and Coupeville.

Population Trend in Island County WA

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

Island County Zip Codes

Island County has 8 zip codes. Some of the county's most populated zip codes include Oak Harbor (98277), Stanwood (98282) and Coupeville (98239). Oak Harbor is the largest zip by population, with about 41,517 residents or 48% of the county total. Together, the three largest zips account for about 76% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Island County WA

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

Island County Demographics

Island County has a median age of 44.5, which makes the county a little older than Washington overall. About 17.6% of residents are under 18, while 26.1% 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 28.8% of the population, which points to a solid working-age base. About 35.7% of adults have a bachelor's degree or higher, above the statewide figure of 38.8%. 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 Island County WA

Island County School Districts

Island County is served by 4 public school districts with 12,674 students enrolled in 2024. The largest districts on the county map are Oak Harbor, Stanwood-Camano and South Whidbey. Those three districts account for about 92% 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 Island County WA

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

Island County Housing & Real Estate

Island County has a median home value of $535,300 and a median gross rent of $1,631. About 75% 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 $797,000 and homes spent about 37 days on the market.

Businesses in Island County, WA

Island County has 3,017 business listings across 567 categories. The largest categories in Island County business listings are Parks & Recreation (75, 2.5%), Real Estate Agents (73, 2.4%), and Churches & Religious Organizations (63, 2.1%). The full Island County business listings dataset includes names, categories, addresses and contact details where available. Island County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Island County, WA

Island County Business Listings

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

Island County Basemaps

Island 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 Washington — explore the full structure before you buy.