• county
  • FIPS 41051
  • Largest town: Portland

Multnomah County, Oregon

Multnomah County had 795,897 residents in the Census Vintage 2024 estimate, on 431.0 square miles of land. It is the most populous of Oregon's 36 county-equivalents.

Population
795,897
#1 of 36 in Oregon · #82 in US
Area
431.0 sq mi
#36 of 36 in Oregon · #2,359 in US
Density
1,847 / sq mi
#1 of 36 in Oregon · #79 in US
Median household income
$83,290
#5 of 36 in Oregon · #362 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Multnomah County within Oregon. Pin: Salem.

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Tools and pages that start from Multnomah County

Multnomah County population, land area and income

Multnomah County had 795,897 residents in the Census Vintage 2024 estimate, on 431.0 square miles of land. It is the most populous of Oregon's 36 county-equivalents. That works out to 1,846.5 people per square mile, 19.2 times the US average of 96.3, and in the top tenth nationally.

The median county-equivalent in Oregon has 46,128 residents, so Multnomah County is 17.3 times that size.

Its SAIPE 2023 median household income of $83,290 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

795,897

3144th1st

82nd of 3,144 (US)

Land area

431 sq mi

3144th1st

2359th of 3,144 (US)

Density

1,846.5 / sq mi

3144th1st

79th of 3,144 (US)

Median household income

$83,290

3143rd1st

362nd of 3,143 (US)

Rank within Oregon (36)

Population

795,897

36th1st

1st of 36 (OR)

Land area

431 sq mi

36th1st

36th of 36 (OR)

Density

1,846.5 / sq mi

36th1st

1st of 36 (OR)

Median household income

$83,290

36th1st

5th of 36 (OR)

How Multnomah County's population changed since 2020

Multnomah County lost 20,424 residents between the July 2020 and July 2024 estimates, a drop of 2.5%. That ranks 35th of 36 in Oregon for growth. The median Oregon county changed by +0.8%, and the state as a whole by +0.7%.

Since the April 2020 estimates base, Multnomah County recorded 31,456 births and 28,680 deaths, a natural change of +2,776. Net international migration added +12,984 and net domestic migration, people moving to or from other US counties, came to -34,997. The largest single component was domestic migration, which removed 34,997 people.

816.3k2020804.9k2021796.0k2022794.3k2023795.9k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
31,456
Deaths
28,680
Net international migration
+12,984
Net domestic migration
-34,997
Change, July 2023 to July 2024
+1,626

Where Multnomah County is

The Census internal point of Multnomah County is at 45.547700, -122.417400. It sits in UTM zone 10N. The map shades Oregon's 36 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Multnomah County outlined. Dots are towns of 1,000+ people with residents in it.

Grant County: -1.9%Sherman County: +6.9%Wasco County: -0.4%Gilliam County: -2.2%Columbia County: +2.6%Baker County: +0.1%Hood River County: -0.6%Wheeler County: -0.2%Josephine County: +0.1%Crook County: +9.7%Curry County: -3.2%Coos County: -1.0%Jackson County: -1.1%Clackamas County: +0.8%Multnomah County: -2.5%Harney County: -1.4%Union County: -0.4%Wallowa County: +1.6%Lincoln County: +1.4%Yamhill County: +2.9%Klamath County: +1.2%Malheur County: +2.1%Jefferson County: +3.9%Washington County: +1.7%Lane County: -0.5%Umatilla County: +0.7%Lake County: +0.2%Douglas County: +0.9%Clatsop County: -0.3%Deschutes County: +6.0%Morrow County: +1.1%Tillamook County: -0.7%Marion County: +1.9%Polk County: +2.9%Linn County: +2.7%Benton County: +5.6%
Change 2020 to 2024
  1. < -0.7%
  2. < +0.1%
  3. < +1.2%
  4. < +2.7%
  5. ≥ +2.7%
no data

Orange pin: Multnomah County internal point. Dark pin: Salem.

Internal point

Decimal
45.547700, -122.417400
DMS
45°32'51.72"N 122°25'2.64"W
UTM
10N 545478.2E 5043960.9N
Geohash
c20gn7dqe
Plus code
84QVGHXM+32

Towns in Multnomah County

6 incorporated places of 1,000+ people have residents in Multnomah County, 778,535 people together, or 98% of the county. Each figure counts only the part of the town inside Multnomah County; towns marked "part" extend into another county. The largest is Portland with 633,255.

  1. 01Portland (part)633,255
  2. 02Gresham111,507
  3. 03Troutdale15,749
  4. 04Fairview10,796
  5. 05Wood Village4,722
  6. 06Lake Oswego (part)2,506
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Multnomah County

The Census 2024 county adjacency file lists 6 neighbors for Multnomah County, including 2 across a state line. The most populous is Washington County, OR, with 611,272 residents. Distances run between Census internal points in a straight line.

Distance to Salem and the nearest big city

Salem is 51.5 miles SW of Multnomah County's internal point in a straight line. The nearest place of 100,000 or more is Gresham, OR (population 111,507), 3.4 miles away. The nearest place of 10,000 or more is Fairview, OR (population 10,796), 0.9 miles away.

Multnomah County FIPS code

The FIPS code of Multnomah County is 41051: state code 41 for Oregon plus county code 051. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $83,290.

Questions people ask

What is the population of Multnomah County, Oregon?

The Census Vintage 2024 estimate for July 1, 2024 is 795,897. That is down 20,424 people (2.5%) from the July 2020 estimate of 816,321.

What is the FIPS code of Multnomah County?

41051. The first two digits (41) are Oregon; the last three (051) identify the county.

What is the largest town in Multnomah County?

Portland, with 633,255 residents inside Multnomah County in 2024 (635,749 across all 3 counties it spans).

Which counties border Multnomah County?

6 county-equivalents border it in the Census 2024 adjacency file: Washington County, OR; Clark County, WA; Clackamas County, OR; Columbia County, OR; Hood River County, OR; Skamania County, WA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.