What is the largest city in Multnomah County, OR?

Portland is the largest city or town in Multnomah County, with about 641,165 residents.

How many ZIP codes are in Multnomah County?

Multnomah County includes 34 ZIP Code Tabulation Areas, including 97019, 97024, 97030, 97060, 97080.

What is the population of Multnomah County, OR?

About 801,477 people live in Multnomah County, based on American Community Survey 5-year estimates.

What counties border Multnomah County?

Multnomah County borders Washington County, Clark County, WA, Clackamas County, Columbia County, Hood River County, Skamania County, WA.

Multnomah County, OR: Cities, ZIP Codes & Local Data

Population

801,477

Land area

431sq mi

People per sq mi

1,859

ZIP codes

34

Multnomah County at a glance

Multnomah County is about 42 times as dense as Oregon as a whole.
It is the most populous county in Oregon.
Households here earn a median of $88,766 a year, 7% more than the Oregon figure of $83,011.
A typical owner-occupied home is valued at $552,700 (16% above Oregon) and median rent is $1,646 a month.
The biggest population centers are Portland (641,165), Gresham (112,378) and Troutdale (15,923).

Local data for Multnomah County, OR

Counts from official public data

Housing and community stats

Multnomah County, OR, American Community Survey 2020-2024

Full profile

Median household income

$88,766

Poverty rate

12.6%

Median home value

$552,700

Prices +0.3% in a year

Median rent

$1,646/mo

Homeownership

53.4%

Bachelor's or higher

48.9%

Median age

38.7

Average commute

24.4 min

Largest reported origins and ancestries: German Americans (120,035), Irish Americans (92,031), Mexican Americans (77,101).

Home values and rents Income, education and commute

Economy and federal money

Jobs, income, federal spending and pandemic loans

Details

Unemployment rate

4.3%

Sep 2026, -1.0 pts in a year

Average annual pay

$84,123

494,307 jobs, 2025

Income per person

$78,973

BEA, 2024

Federal spending

$8.7B

FY 2026, $10,708 per person

PPP loans

$2.9B

30,824 loans, 305,593 jobs reported

Campaign donations

$8.5M

Itemized, 2026 cycle

Economy Federal spending PPP loans

How people get to work

Multnomah County, OR, workers 16 and older. American Community Survey 5-year estimates

Drove alone52.6%
Carpooled7.5%
Public transit5.5%
Walked4.0%
Bicycle2.8%
Taxi, ride-hailing, motorcycle or other1.5%
Worked from home26.1%

Average one-way commute: 24.4 minutes for people who do not work from home.

Environment and hazard risk

Multnomah County, OR, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively High

Top: earthquake

Storm events since 1996

112

Most often heavy rain

Flood insurance policies

1,087

0.4% of homes, county

July high / Jan low

81° / 34°F

37.5 inches of rain a year

Hazards, floods and storm history Check a flood zone 560 historic places

Health statistics

Share of adults in Multnomah County, OR, CDC PLACES estimates

All 40 measures

Obesity

28.9%

U.S. 33.3% -4.4 pts

Diabetes

9.5%

U.S. 12.1% -2.6 pts

Smoking

12.0%

U.S. 12.8% -0.8 pts

Uninsured (18-64)

7.5%

U.S. 11.1% -3.6 pts

Cities, towns and ZIP codes in Multnomah County

Population shown

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Frequently asked questions

What is the largest city in Multnomah County, OR?: Portland is the largest city or town in Multnomah County, with about 641,165 residents.
How many ZIP codes are in Multnomah County?: Multnomah County includes 34 ZIP Code Tabulation Areas, including 97019, 97024, 97030, 97060, 97080.
What is the population of Multnomah County, OR?: About 801,477 people live in Multnomah County, based on American Community Survey 5-year estimates.
What counties border Multnomah County?: Multnomah County borders Washington County, Clark County, WA, Clackamas County, Columbia County, Hood River County, Skamania County, WA.