Population 349,244 · Census ACS 2020–24
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Population and households in Marion County
Household size in Marion County
| Period | Marion County | Oregon | U.S. |
|---|---|---|---|
| 2006–10 | 2.70 | 2.50 | 2.68 |
| 2010–14 | 2.78 | 2.55 | 2.73 |
| 2015–19 | 2.85 | 2.56 | 2.71 |
| 2020–24 | 2.76 | 2.50 | 2.65 |
| Change | +0.06 | +0.00 | −0.03 |
Households in Marion County average 2.76 people, a bit above the national 2.65, so families with children are somewhat more common here. Since 2006–10, household size has crept up from 2.70, even as the national average fell. Only three of Oregon's 36 counties have larger households.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Marion County
| Period | Marion County | Oregon | U.S. |
|---|---|---|---|
| 2006–10 | 36.6 | 39.0 | 37.7 |
| 2010–14 | 37.1 | 40.0 | 38.6 |
| 2015–19 | 37.6 | 40.9 | 39.6 |
| 2020–24 | 38.5 | 41.6 | 40.1 |
| Change | +1.9 | +2.5 | +2.3 |
Marion County is a little younger than the country as a whole: its median age is 38.5, against 40.1 nationally. The median age has climbed from 36.6 in 2006–10, in line with the national trend. The youngest areas are in the center, the oldest in the southeast.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Marion County
| Period | Marion County | Oregon | U.S. |
|---|---|---|---|
| 2006–10 | 12.7% | 10.5% | 12.3% |
| 2010–14 | 14.6% | 10.8% | 12.3% |
| 2015–19 | 12.8% | 9.9% | 11.6% |
| 2020–24 | 13.3% | 10.4% | 11.6% |
| Change | +0.5 pts | −0.1 pts | −0.6 pts |
Single parents head just over one in eight households in Marion County (13.3%), a bit above the national share of 11.6%. The single-parent share is up 0.5 points from 2006–10, even as the national share fell. Marion County has a higher share of single-parent households than the great majority of Oregon counties.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Marion County
Renters in Marion County
| Period | Marion County | Oregon | U.S. |
|---|---|---|---|
| 2006–10 | 38.0% | 36.2% | 33.3% |
| 2010–14 | 40.4% | 38.5% | 35.6% |
| 2015–19 | 39.8% | 37.6% | 36.0% |
| 2020–24 | 37.7% | 36.7% | 34.8% |
| Change | −0.3 pts | +0.5 pts | +1.5 pts |
Nearly four in ten households in Marion County rent their homes (37.7%), close to the national share of 34.8%. Among homeowners, 36.1% have no mortgage at all, below the national share of 39.8%. Rentals cluster in the west; owners are most common in the south.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Marion County
| Period | Marion County | Oregon | U.S. |
|---|---|---|---|
| 2006–10 | 6.7% | 8.9% | 11.4% |
| 2010–14 | 7.1% | 9.1% | 11.4% |
| 2015–19 | 7.4% | 8.3% | 11.1% |
| 2020–24 | 5.3% | 7.4% | 9.6% |
| Change | −1.3 pts | −1.5 pts | −1.8 pts |
Empty homes are scarce in Marion County: just 5.3% sit vacant, compared with 9.6% nationally, a sign of a tight housing market. Vacancy has edged down 1.3 points since 2006–10, as it has nationally. Only one other Oregon county has a lower vacancy rate.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Marion County
| Period | Marion County | Oregon | U.S. |
|---|---|---|---|
| 2006–10 | 1977 | 1976 | 1974 |
| 2010–14 | 1977 | 1977 | 1975 |
| 2015–19 | 1978 | 1978 | 1977 |
| 2020–24 | 1982 | 1981 | 1980 |
| Change | +5 | +5 | +6 |
Homes in Marion County are about the same age as the nation's housing: the median home was built in 1982, versus 1980 nationally. The median year built has moved up from 1977 in 2006–10, a sign of steady new building. The newest homes are mostly in the south, the oldest in the west.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Marion County
| Period | Marion County | Oregon | U.S. |
|---|---|---|---|
| 2006–10 | $816 | $870 | $965 |
| 2010–14 | $892 | $982 | $1,040 |
| 2015–19 | $1,053 | $1,183 | $1,213 |
| 2020–24 | $1,507 | $1,601 | $1,571 |
| Change | +$691 | +$731 | +$606 |
The median renter in Marion County pays $1,507 a month for rent and utilities, close to the national median of $1,571. Rents here are lower than in Oregon as a whole ($1,601). Rents are up $691 a month from 2006–10, an 85% jump, faster than rents rose nationally. Rent takes 31.5% of the typical renter's income, just over the 30% mark often used to define affordable rent.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Marion County
Bachelor's degrees in Marion County
| Period | Marion County | Oregon | U.S. |
|---|---|---|---|
| 2006–10 | 20.6% | 29.0% | 28.4% |
| 2010–14 | 21.7% | 30.2% | 29.6% |
| 2015–19 | 23.1% | 33.5% | 32.1% |
| 2020–24 | 25.5% | 36.4% | 35.6% |
| Change | +4.9 pts | +7.3 pts | +7.2 pts |
Fewer adults in Marion County have a four-year degree than in the country as a whole: 25.5%, against 35.6% nationally. The share with a degree has risen 4.9 points since 2006–10, mirroring the country. College graduates are most concentrated in the southwest and least in the center.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Marion County
| Period | Marion County | Oregon | U.S. |
|---|---|---|---|
| 2006–10 | 81.6% | 88.5% | 84.9% |
| 2010–14 | 83.3% | 89.4% | 86.1% |
| 2015–19 | 84.7% | 90.5% | 87.7% |
| 2020–24 | 85.3% | 91.5% | 89.3% |
| Change | +3.7 pts | +3.0 pts | +4.3 pts |
About one in seven adults in Marion County never finished high school, more than nationally: 85.3% have a diploma or equivalent, against 89.3% across the U.S. The share with a diploma has risen 3.7 points since 2006–10, as it has nationally. Of Oregon's 36 counties, only three have a lower share of high school graduates.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Marion County
| Period | Marion County | Oregon | U.S. |
|---|---|---|---|
| 2006–10 | 10.1% | 8.8% | 8.1% |
| 2010–14 | 12.4% | 10.6% | 9.4% |
| 2015–19 | 5.6% | 5.6% | 5.6% |
| 2020–24 | 5.3% | 5.3% | 5.4% |
| Change | −4.8 pts | −3.5 pts | −2.7 pts |
At 5.3%, unemployment in Marion County is close to the national rate of 5.4%. Since 2006–10, unemployment has fallen 4.8 points, mirroring the country. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Marion County compared with nearby counties
| County | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Marion County | 2.76 | 38.5 | 13.3% | 37.7% | 5.3% | 1982 | $1,507 | 25.5% | 85.3% | 5.3% |
| Polk County | 2.71 | 38.8 | 11.0% | 35.3% | 6.2% | 1989 | $1,491 | 31.0% | 91.7% | 5.4% |
| Wheeler County | 2.09 | 56.9 | 3.3% | 28.2% | 19.0% | 1968 | $929 | 18.8% | 90.8% | 2.6% |
| Adams County | 2.66 | 53.1 | 3.5% | 15.3% | 32.1% | 1985 | $906 | 22.2% | 93.1% | 7.4% |
| Ziebach County | 3.23 | 36.5 | 27.3% | 42.9% | 16.9% | 1986 | $724 | 15.2% | 89.9% | 24.6% |
| Potter County | 2.23 | 49.3 | 3.6% | 18.5% | 32.7% | 1974 | $1,026 | 26.8% | 96.6% | 2.8% |
| Faulk County | 2.25 | 42.1 | 1.7% | 20.4% | 20.3% | 1964 | $823 | 22.2% | 91.0% | 5.6% |
| Spink County | 2.44 | 45.6 | 4.4% | 27.3% | 18.4% | 1954 | $746 | 28.2% | 93.5% | 1.3% |
| Clark County | 2.91 | 39.5 | 5.8% | 22.5% | 16.6% | 1957 | $754 | 20.8% | 91.1% | 3.6% |
| Codington County | 2.32 | 39.6 | 7.7% | 30.2% | 9.5% | 1979 | $1,052 | 23.0% | 94.4% | 2.1% |
| Lac qui Parle County | 2.25 | 46.8 | 7.4% | 17.5% | 15.3% | 1950 | $716 | 24.2% | 95.2% | 2.1% |
All figures 2020–24.
Counties with similar populations: Yakima County, WA · Winnebago County, IL · Anoka County, MN · Atlantic County, NJ · Williamson County, TN · Osceola County, FL · Merced County, CA · Mercer County, NJ · Mobile County, AL · Monterey County, CA
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Marion County. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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