Polk County GIS Maps

Polk 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.

Polk County Parcels

Polk County has 35,188 mapped parcels covering 468,765 acres. The median assessed value is $218,090. The median lot size is 5.75 acres. 5,061 parcels are 10 acres or larger. Residential improved, zoned residential accounts for 51.8% of parcels. Improved h&b use tract, zoning not significant follows at 5.4% and improved h&b use tract, farm def, zoned efu at 3.8%. The records carry 26,401 distinct owner names. Owner names, assessed values and lot sizes are on nearly every parcel. Browse the interactive Polk County Parcel viewer here.

Polk County Parcel Data Coverage

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

Polk County Population

Polk County had 87,433 residents in 2020. That was 16% higher than in 2010. Polk County added 25,053 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 118 people per square mile. Some of the county's most populated postal areas include Salem, Dallas and Monmouth.

Population Trend in Polk County OR

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

Polk County Zip Codes

Polk County has 6 zip codes. Some of the county's most populated zip codes include Salem (97304), Dallas (97338) and Monmouth (97361). Salem is the largest zip by population, with about 34,102 residents or 39% of the county total. Together, the three largest zips account for about 80% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Polk County OR

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

Polk County Demographics

Polk County has a median age of 37.6, which makes the county a little younger than Oregon overall. About 22.1% of residents are under 18, while 18.8% 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 30.3% of the population, which points to a solid working-age base. About 30.6% of adults have a bachelor's degree or higher, above the statewide figure of 36.2%. 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 Polk County OR

Polk County School Districts

Polk County is served by 9 public school districts with 48,553 students enrolled in 2024. The largest districts on the county map are Salem-Keizer 24J, Central 13J and Dallas 2. Those three districts account for about 90% 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 Polk County OR

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

Polk County Housing & Real Estate

Polk County has a median home value of $419,500 and a median gross rent of $1,270. About 65% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Oregon median, while rents come in below the state average. In March 2026, the median listing price was $537,193 and homes spent about 69 days on the market.

Businesses in Polk County, OR

Polk County has 2,443 business listings across 492 categories. The largest categories in Polk County business listings are Churches & Religious Organizations (73, 3.0%), Winery (67, 2.7%), and Parks & Recreation (60, 2.5%). The full Polk County business listings dataset includes names, categories, addresses and contact details where available. Polk County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Polk County, OR

Polk County Business Listings

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

Polk County Basemaps

Polk 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 Oregon — explore the full structure before you buy.