Marshall County, IA Demographics

Population 40,114 · Census ACS 2020–24

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Median age by neighborhoodHistory and comparison ↓︎
Marshall County, IA map of median age by neighborhood
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Population and households in Marshall County

Household size in Marshall County

Household size, people per household
PeriodMarshall CountyIowaU.S.
2006–102.502.442.68
2010–142.612.452.73
2015–192.542.432.71
2020–242.582.432.65
Change+0.08−0.01−0.03
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Households in Marshall County average 2.58 people, about the same as the country as a whole (2.65). The typical household here is bigger than in Iowa as a whole, where it has 2.43 people. Since 2006–10, household size has crept up from 2.50, even as the national average fell. Few Iowa counties have larger households: only seven of 99.

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 Marshall County

Median age, years
PeriodMarshall CountyIowaU.S.
2006–1040.438.837.7
2010–1440.439.338.6
2015–1940.439.739.6
2020–2439.839.840.1
Change−0.6+1.0+2.3
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Half of the people in Marshall County are younger than 39.8 and half are older, close to the national median of 40.1. The median age has edged down from 40.4 in 2006–10, even as the national median rose. The youngest areas are in the east, the oldest in the south.

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 Marshall County

Single-parent households, % of households
PeriodMarshall CountyIowaU.S.
2006–108.8%9.5%12.3%
2010–1410.6%9.9%12.3%
2015–1910.9%10.0%11.6%
2020–2410.7%10.0%11.6%
Change+1.9 pts+0.6 pts−0.6 pts
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Single parents head just over one in ten households in Marshall County (10.7%), close to the national share of 11.6%. The single-parent share is up 1.9 points from 2006–10, even as the national share fell.

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 Marshall County

Renters in Marshall County

Renters, % of occupied homes
PeriodMarshall CountyIowaU.S.
2006–1025.0%26.8%33.3%
2010–1426.7%28.2%35.6%
2015–1929.5%28.9%36.0%
2020–2425.0%28.3%34.8%
Change−0.0 pts+1.5 pts+1.5 pts
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About a quarter of households in Marshall County rent their homes (25.0%), below the national share of 34.8%; the rest own. More than four in ten owners (45.4%) have paid off their mortgages, above the national share of 39.8%. Renting is most common in the north and least common in the southeast.

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 Marshall County

Vacant homes, % of all homes
PeriodMarshall CountyIowaU.S.
2006–109.0%8.7%11.4%
2010–149.3%8.6%11.4%
2015–199.4%9.4%11.1%
2020–249.5%8.8%9.6%
Change+0.5 pts+0.1 pts−1.8 pts
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Vacancy in Marshall County is close to the national rate: 9.5% of homes are empty, against 9.6%. Vacancy is little changed from 2006–10, while the national rate fell.

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 Marshall County

Age of homes, median year built
PeriodMarshall CountyIowaU.S.
2006–10195619651974
2010–14195519671975
2015–19195719691977
2020–24195719711980
Change+1+6+6
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Marshall County is a place of older homes: half were built before 1957, while the national median is 1980. That means established neighborhoods, and more houses that may need updating. The newest homes are mostly in the south, the oldest in the north.

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 Marshall County

Rent, per month
PeriodMarshall CountyIowaU.S.
2006–10$612$669$965
2010–14$723$732$1,040
2015–19$684$821$1,213
2020–24$1,039$1,020$1,571
Change+$427+$351+$606
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Rent in Marshall County runs $1,039 a month at the median, utilities included, well below the U.S. median of $1,571. Rent has climbed $427 a month since 2006–10, up 70%, faster than rents rose nationally. Rent takes 25.0% of the typical renter's income, comfortably under the 30% mark often used to define affordable rent. Renters on a budget will find the lowest rents in the southwest; the highest are in the center.

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 Marshall County

Bachelor's degrees in Marshall County

Bachelor's degrees, % of adults 25+
PeriodMarshall CountyIowaU.S.
2006–1018.9%26.5%28.4%
2010–1420.1%27.9%29.6%
2015–1918.8%29.3%32.1%
2020–2422.6%32.3%35.6%
Change+3.8 pts+5.8 pts+7.2 pts
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College degrees are relatively uncommon in Marshall County: 22.6% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%. Since 2006–10, the share with a degree has risen 3.8 points, as it has nationally. College graduates are most concentrated in the south and least in the northeast.

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 Marshall County

High school graduates, % of adults 25+
PeriodMarshall CountyIowaU.S.
2006–1085.6%90.4%84.9%
2010–1484.4%91.4%86.1%
2015–1983.5%92.1%87.7%
2020–2486.1%93.0%89.3%
Change+0.5 pts+2.7 pts+4.3 pts
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About one in seven adults in Marshall County never finished high school, a bit more than nationally: 86.1% have a diploma or equivalent, against 89.3% across the U.S. The share with a diploma is up 0.5 points from 2006–10, a smaller shift than nationally. Of Iowa's 99 counties, only five 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 Marshall County

Unemployment, % of the labor force
PeriodMarshall CountyIowaU.S.
2006–106.9%5.2%8.1%
2010–146.4%5.4%9.4%
2015–194.8%3.7%5.6%
2020–244.2%3.7%5.4%
Change−2.7 pts−1.5 pts−2.7 pts
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Unemployment in Marshall County runs below the national rate: 4.2% of the labor force was out of work and looking, against 5.4% nationally. Unemployment is down 2.7 points from 2006–10, in line with the national trend. 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).

Marshall County compared with nearby counties

CountyHousehold sizeMedian ageSingle parentsRentersVacant homesMedian year builtMedian rentBachelor's degreeHigh school diplomaUnemployment
Marshall County2.5839.810.7%25.0%9.5%1957$1,03922.6%86.1%4.2%
Tama County2.4742.613.3%24.0%11.8%1959$87019.9%91.6%4.5%
Story County2.3633.85.1%44.5%9.3%1983$1,02658.0%96.8%4.3%
Benton County2.5343.29.7%15.0%7.7%1967$84325.7%95.3%1.9%
Boone County2.4142.78.5%20.0%8.7%1961$93028.5%95.1%1.5%
Linn County2.4439.611.3%26.5%8.3%1980$1,05734.2%94.8%3.4%
Greene County2.1945.98.1%23.6%10.1%1952$82221.3%93.5%2.2%
Jones County2.4342.913.3%19.4%7.8%1968$84622.0%95.3%4.4%
Carroll County2.3341.97.9%22.9%8.8%1960$80924.2%95.3%1.8%
Jackson County2.3945.46.3%19.3%11.0%1965$85319.1%94.3%5.5%
Crawford County2.5140.318.5%24.0%8.3%1960$73217.7%83.2%3.9%

All figures 2020–24.

Counties with similar populations: Amador County, CA · Waldo County, ME · Barren County, KY · Baldwin County, GA · Avoyelles Parish, LA · Auglaize County, OH · Atascosa County, TX · Allegany County, NY · Albany County, WY · Aguada Municipio, PR

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 Marshall 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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