• county
  • FIPS 41047
  • Largest town: Salem

Marion County, Oregon

Marion County had 352,867 residents in the Census Vintage 2024 estimate, on 1,180.8 square miles of land. It ranks 5th of 36 in Oregon by population and 25th by land area.

Population
352,867
#5 of 36 in Oregon · #214 in US
Area
1,180.8 sq mi
#25 of 36 in Oregon · #519 in US
Density
299 / sq mi
#3 of 36 in Oregon · #437 in US
Median household income
$73,210
#13 of 36 in Oregon · #771 in US

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

Marion County within Oregon. Pin: Salem.

Measure from here

Tools and pages that start from Marion County

Marion County population, land area and income

Marion County had 352,867 residents in the Census Vintage 2024 estimate, on 1,180.8 square miles of land. It ranks 5th of 36 in Oregon by population and 25th by land area. That works out to 298.8 people per square mile, 3.1 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Oregon has 46,128 residents, so Marion County is 7.6 times that size.

Its SAIPE 2023 median household income of $73,210 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

352,867

3144th1st

214th of 3,144 (US)

Land area

1,181 sq mi

3144th1st

519th of 3,144 (US)

Density

298.8 / sq mi

3144th1st

437th of 3,144 (US)

Median household income

$73,210

3143rd1st

771st of 3,143 (US)

Rank within Oregon (36)

Population

352,867

36th1st

5th of 36 (OR)

Land area

1,181 sq mi

36th1st

25th of 36 (OR)

Density

298.8 / sq mi

36th1st

3rd of 36 (OR)

Median household income

$73,210

36th1st

13th of 36 (OR)

How Marion County's population changed since 2020

Marion County gained 6,562 residents between the July 2020 and July 2024 estimates, a rise of 1.9%. That ranks 11th 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, Marion County recorded 16,383 births and 14,485 deaths, a natural change of +1,898. Net international migration added +5,790 and net domestic migration, people moving to or from other US counties, came to -1,012. The largest single component was international migration, which added 5,790 people.

346.3k2020347.8k2021349.4k2022349.9k2023352.9k2024
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
16,383
Deaths
14,485
Net international migration
+5,790
Net domestic migration
-1,012
Change, July 2023 to July 2024
+2,993

Where Marion County is

The Census internal point of Marion County is at 44.900900, -122.576300. 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 Marion 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: Marion County internal point. Dark pin: Salem.

Internal point

Decimal
44.900900, -122.576300
DMS
44°54'3.24"N 122°34'34.68"W
UTM
10N 533451.6E 4972029.1N
Geohash
9rbz6tywt
Plus code
84PVWC2F+9F

Towns in Marion County

15 incorporated places of 1,000+ people have residents in Marion County, 263,221 people together, or 75% of the county. Each figure counts only the part of the town inside Marion County; towns marked "part" extend into another county. The largest is Salem with 149,984.

  1. 01Salem (part)149,984
  2. 02Keizer39,152
  3. 03Woodburn30,449
  4. 04Silverton10,391
  5. 05Stayton8,521
  6. 06Aumsville4,216
  7. 07Mount Angel3,436
  8. 08Hubbard3,402
  9. 09Jefferson3,296
  10. 10Sublimity2,879
  11. 11Gervais2,571
  12. 12Turner2,414
  13. 13Aurora1,122
  14. 14Donald1,013
  15. 15Mill City (part)375
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Marion County

The Census 2024 county adjacency file lists 6 neighbors for Marion County. The most populous is Clackamas County, OR, with 425,857 residents. Distances run between Census internal points in a straight line.

Distance to Salem and the nearest big city

Salem is 22.4 miles W of Marion County's internal point in a straight line. The nearest place of 100,000 or more is Salem, OR (population 180,406), 21.9 miles away. The nearest place of 10,000 or more is Silverton, OR (population 10,391), 12.2 miles away.

Marion County FIPS code

The FIPS code of Marion County is 41047: state code 41 for Oregon plus county code 047. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $73,210.

Questions people ask

What is the population of Marion County, Oregon?

The Census Vintage 2024 estimate for July 1, 2024 is 352,867. That is up 6,562 people (1.9%) from the July 2020 estimate of 346,305.

What is the FIPS code of Marion County?

41047. The first two digits (41) are Oregon; the last three (047) identify the county.

What is the largest town in Marion County?

Salem, with 149,984 residents inside Marion County in 2024 (180,406 across all 2 counties it spans).

Which counties border Marion County?

6 county-equivalents border it in the Census 2024 adjacency file: Clackamas County, OR; Linn County, OR; Yamhill County, OR; Polk County, OR; Wasco County, OR; Jefferson County, OR.

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.