Multnomah County GIS Maps
Multnomah County, Oregon, has 815,428 residents across 284,333 parcels and covers 431.1 square miles. The population grew 10.9% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Multnomah County is 41051.
Portland is the county's largest population center. Multnomah County also includes 34 zip codes, 10 public school districts and 17 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.
Multnomah County Trends
- Population
- 815,428▴
- Median Home Value
- $528,000▴
- K-12 Enrollment
- 120,975▾
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.
Multnomah 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.
Multnomah County Parcels
Multnomah County has 284,333 mapped parcels covering 267,408 acres. The median assessed value is $515,990. The median lot size is 0.14 acres. 2,818 parcels are 10 acres or larger. Of the parcels with a recorded build year, half were built in 1962 or earlier. The records carry 226,795 distinct owner names. About 8% of parcels list an owner mailing address outside Oregon. Owner names, mailing addresses and lot sizes are on nearly every parcel. Site addresses reach 96.5%. Assessed values reach 97.7%. Browse the interactive Multnomah County Parcel viewer here.
Multnomah County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 284,333 | 100% |
| Owner name | 284,325 | 99.9% |
| Owner mailing address | 284,114 | 99.9% |
| Site address | 274,356 | 96.5% |
| Land use code | 284,333 | 100% |
| Land use description | 0 | 0% |
| Assessed value | 277,917 | 97.7% |
| Land value | 283,060 | 99.6% |
| Improvement value | 283,060 | 99.6% |
| Acreage | 284,333 | 100% |
| Parcel boundary | 284,333 | 100% |
| Download all Multnomah County parcels. | ||
Field coverage measured across all Multnomah County parcel records.
Multnomah County Population
Multnomah County had 815,428 residents in 2020. That was 10.9% higher than in 2010. Multnomah County added 154,942 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 1,891 people per square mile. Some of the county's most populated postal areas include Portland, Gresham and Portland.
Population Trend in Multnomah County OR
Multnomah County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Multnomah County Zip Codes
Multnomah County has 34 zip codes. Some of the county's most populated zip codes include Portland (97206), Gresham (97080) and Portland (97202). Portland is the largest zip by population, with about 51,072 residents or 6% of the county total. Together, the three largest zips account for about 17% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Multnomah County OR
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 97206 | Portland | 51,072 | ▴ 7.3% |
| 97080 | Gresham | 45,647 | ▴ 11.6% |
| 97202 | Portland | 43,193 | ▴ 11.4% |
| 97219 | Portland | 42,474 | ▴ 9.7% |
| 97233 | Portland | 41,625 | ▴ 5.7% |
| Download all zip code data | |||
Multnomah County Zip Code populations and trends per most recent census data.
Multnomah County Demographics
Multnomah County has a median age of 38.5, which makes the county a little younger than Oregon overall. About 17.9% of residents are under 18, while 14.4% 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 42.3% of the population, which points to a solid working-age base. About 48.6% 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 Multnomah County OR
Median Age
38.5
Under 18
17.9%
Age 65+
14.4%
Bachelor's+
48.6%
Multnomah County School Districts
Multnomah County is served by 10 public school districts with 120,975 students enrolled in 2024. The largest districts on the county map are Portland 1J, Beaverton 48J and Gresham-Barlow 1J. Those three districts account for about 75% 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 Multnomah County OR
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Portland School District 1J | 41,894 | 34.6% | ▾ -1.5% |
| Beaverton School District 48J | 37,479 | 31% | ▾ -0.5% |
| Gresham-Barlow School District 1J | 11,345 | 9.4% | ▴ 1% |
| Reynolds School District 7 | 9,631 | 8% | ▴ 0.8% |
| David Douglas School District 40 | 8,716 | 7.2% | ▴ 0.6% |
| Download all school district data | |||
Multnomah County school district enrollment and trends per most recent NCES reporting data.
Multnomah County Housing & Real Estate
Multnomah County has a median home value of $528,000 and a median gross rent of $1,582. About 54% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Oregon median, while rents come in above the state average. In March 2026, the median listing price was $466,667 and homes spent about 50 days on the market.
Multnomah County Housing Mix
Multnomah County housing mix: owner, renter and vacant units.
Multnomah County Housing Trends
Multnomah County median home value and rent trend (last 5 years).
Businesses in Multnomah County, OR
Multnomah County has 42,750 business listings across 1,281 categories. The largest categories in Multnomah County business listings are Medical Offices (1,079, 2.5%), Landmark And Historical Building (1,010, 2.4%), and Community & Nonprofits (635, 1.5%). The full Multnomah County business listings dataset includes names, categories, addresses and contact details where available. Multnomah County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Multnomah County, OR
| Category | Businesses | Share |
|---|---|---|
| Medical Offices | 1,079 | 2.5% |
| Landmark And Historical Building | 1,010 | 2.4% |
| Community & Nonprofits | 635 | 1.5% |
| Real Estate Agents | 596 | 1.4% |
| Churches & Religious Organizations | 573 | 1.3% |
| Coffee Shops | 571 | 1.3% |
| Parks & Recreation | 567 | 1.3% |
| Auto Repair | 496 | 1.2% |
| Hair Salons | 483 | 1.1% |
| Professional Services | 476 | 1.1% |
Multnomah County Business Listings
| Business | Category | City |
|---|---|---|
| Icon 3D Signs | 3D Printing Service | Portland |
| Marquis Vermont Hills | Abuse And Addiction Treatment | Portland |
| University of Portland Bookstore | Academic Bookstore | Portland |
| Moberi | Acai Bowls | Portland |
| Garden Park Apartments | Accommodation | Portland |
| 3rd Generation Accounting | Accountant | Portland |
| Acoustic Design Studio, Inc. | Acoustical Consultant | Portland |
| Sport Court of Oregon | Active Life | Portland |
| Willow Tree Acupuncture and Wellness Clinic | Acupuncture | Portland |
| Addiction Treatment Portland | Addiction Rehabilitation Center | Portland |
| Download Multnomah County business listings | ||
Multnomah County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Multnomah County Basemaps
Multnomah 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 Multnomah County Data Package
This page shows a preview of what's included in the Multnomah 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 Multnomah County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.