Marion County, Iowa | |
|---|---|
 TheMarion County Courthouse in Knoxville | |
 Location within the U.S. state ofIowa | |
| Coordinates:41°19′52″N93°06′08″W / 41.331111111111°N 93.102222222222°W /41.331111111111; -93.102222222222 | |
| Country |  United States |
| State |  Iowa |
| Founded | 1845 |
| Named after | Francis Marion |
| Seat | Knoxville |
| Largest city | Pella |
| Area | |
• Total | 571 sq mi (1,480 km2) |
| • Land | 555 sq mi (1,440 km2) |
| • Water | 16 sq mi (41 km2) 2.8% |
| Population (2020) | |
• Total | 33,414 |
• Estimate (2024) | 34,048 |
| • Density | 60.2/sq mi (23.2/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 1st |
| Website | www |
| |
Marion County is acounty in theU.S. state ofIowa. As of the2020 census, the population was 33,414.[2] Thecounty seat isKnoxville.[3] It is named forFrancis Marion, abrigadier general fromSouth Carolina in theAmerican Revolutionary War.[4]
According to theUnited States Census Bureau, the county has a total area of 571 square miles (1,480 km2), of which 555 square miles (1,440 km2) is land and 16 square miles (41 km2) (2.8%) is water.[5]
| Census | Pop. | Note | %± |
|---|---|---|---|
| 1850 | 5,482 | — | |
| 1860 | 16,813 | 206.7% | |
| 1870 | 24,436 | 45.3% | |
| 1880 | 25,111 | 2.8% | |
| 1890 | 23,058 | −8.2% | |
| 1900 | 24,159 | 4.8% | |
| 1910 | 22,995 | −4.8% | |
| 1920 | 24,957 | 8.5% | |
| 1930 | 25,727 | 3.1% | |
| 1940 | 27,019 | 5.0% | |
| 1950 | 25,930 | −4.0% | |
| 1960 | 25,886 | −0.2% | |
| 1970 | 26,352 | 1.8% | |
| 1980 | 29,669 | 12.6% | |
| 1990 | 30,001 | 1.1% | |
| 2000 | 32,052 | 6.8% | |
| 2010 | 33,309 | 3.9% | |
| 2020 | 33,414 | 0.3% | |
| 2024 (est.) | 34,048 | [6] | 1.9% |
| U.S. Decennial Census[7] 1790–1960[8] 1900–1990[9] 1990–2000[10] 2010–2020[11] | |||
As of the2020 census, the county had a population of 33,414 and a population density of58.5/sq mi (22.6/km2). The median age was 41.1 years; 23.3% of residents were under age 18 and 19.6% were 65 years of age or older. For every 100 females there were 98.8 males, and for every 100 females age 18 and over there were 97.2 males.[12]
The racial makeup of the county was 93.2%White, 0.9%Black or African American, 0.2%American Indian and Alaska Native, 1.2%Asian, 0.1%Native Hawaiian andPacific Islander, 0.6% from some other race, and 3.8% fromtwo or more races.Hispanic or Latino residents of any race comprised 2.1% of the population.[13]
53.0% of residents lived in urban areas, while 47.0% lived in rural areas.[14]
There were 13,145 households in the county, of which 29.4% had children under the age of 18 living in them. Of all households, 55.6% were married-couple households, 17.0% were households with a male householder and no spouse or partner present, and 21.8% were households with a female householder and no spouse or partner present. About 27.7% of all households were made up of individuals and 12.7% had someone living alone who was 65 years of age or older.[12]
The 2020 census counted 14,073 housing units, of which 13,145 were occupied, leaving 6.6% vacant; 74.6% of occupied housing units were owner-occupied and 25.4% were renter-occupied, with a homeowner vacancy rate of 1.4% and a rental vacancy rate of 5.4%.[12]
As of the2010 census recorded a population of 33,309 in the county, with a population density of60.1/sq mi (23.2/km2). There were 13,914 housing units, of which 12,723 were occupied.[15]
As of the2000 census, there were 32,052 people, 12,017 households, and 8,532 families residing in the county. Thepopulation density was 58 people per square mile (22 people/km2). There were 12,755 housing units at an average density of 23 units per square mile (8.9 units/km2). The racial makeup of the county was 97.46%White, 0.42%Black orAfrican American, 0.19%Native American, 1.03%Asian, 0.04%Pacific Islander, 0.22% fromother races, and 0.64% from two or more races. 0.80% of the population wereHispanic orLatino of any race.
There were 12,017 households, out of which 33.00% had children under the age of 18 living with them, 61.20% weremarried couples living together, 6.90% had a female householder with no husband present, and 29.00% were non-families. 25.60% of all households were made up of individuals, and 11.90% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.02.
In the county, the population was spread out, with 25.30% under the age of 18, 10.20% from 18 to 24, 26.50% from 25 to 44, 22.10% from 45 to 64, and 15.90% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 98.60 males. For every 100 females age 18 and over, there were 95.80 males.
The median income for a household in the county was $42,401, and the median income for a family was $50,052. Males had a median income of $36,460 versus $25,573 for females. Theper capita income for the county was $18,717. About 5.20% of families and 7.60% of the population were below thepoverty line, including 8.70% of those under age 18 and 10.80% of those age 65 or over.
The population ranking of the following table is based on the2020 census of Marion County.[2]
†county seat
| Rank | City/town/etc. | Municipal type | Population (2020 Census) |
|---|---|---|---|
| 1 | Pella | City | 10,464 |
| 2 | †Knoxville | City | 7,595 |
| 3 | Pleasantville | City | 1,676 |
| 4 | Melcher-Dallas | City | 1,195 |
| 5 | Bussey | City | 387 |
| 6 | Harvey | City | 236 |
| 7 | Hamilton | City | 119 |
| 8 | Swan | City | 76 |
| 9 | Marysville | City | 44 |
| Year | Republican | Democratic | Third party(ies) | |||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| 1880 | 2,452 | 47.46% | 1,520 | 29.42% | 1,194 | 23.11% |
| 1884 | 2,356 | 47.27% | 2,593 | 52.03% | 35 | 0.70% |
| 1888 | 2,374 | 47.30% | 2,322 | 46.26% | 323 | 6.44% |
| 1892 | 2,319 | 43.70% | 2,540 | 47.86% | 448 | 8.44% |
| 1896 | 2,741 | 46.05% | 3,119 | 52.40% | 92 | 1.55% |
| 1900 | 2,950 | 48.53% | 2,950 | 48.53% | 179 | 2.94% |
| 1904 | 2,988 | 53.05% | 2,202 | 39.10% | 442 | 7.85% |
| 1908 | 2,625 | 46.12% | 2,739 | 48.12% | 328 | 5.76% |
| 1912 | 1,191 | 22.66% | 2,276 | 43.31% | 1,788 | 34.02% |
| 1916 | 2,459 | 42.90% | 3,094 | 53.98% | 179 | 3.12% |
| 1920 | 5,435 | 56.62% | 3,861 | 40.22% | 303 | 3.16% |
| 1924 | 5,058 | 47.65% | 2,383 | 22.45% | 3,174 | 29.90% |
| 1928 | 6,225 | 59.36% | 4,113 | 39.22% | 149 | 1.42% |
| 1932 | 3,695 | 33.49% | 7,067 | 64.05% | 272 | 2.47% |
| 1936 | 4,975 | 41.51% | 6,745 | 56.27% | 266 | 2.22% |
| 1940 | 5,763 | 45.19% | 6,915 | 54.22% | 75 | 0.59% |
| 1944 | 4,874 | 42.99% | 6,365 | 56.14% | 99 | 0.87% |
| 1948 | 4,312 | 39.67% | 6,300 | 57.96% | 258 | 2.37% |
| 1952 | 7,165 | 57.25% | 5,196 | 41.51% | 155 | 1.24% |
| 1956 | 6,830 | 56.13% | 5,316 | 43.69% | 22 | 0.18% |
| 1960 | 7,444 | 61.99% | 4,547 | 37.87% | 17 | 0.14% |
| 1964 | 3,903 | 32.96% | 7,911 | 66.80% | 28 | 0.24% |
| 1968 | 5,791 | 52.35% | 4,618 | 41.75% | 653 | 5.90% |
| 1972 | 6,583 | 57.09% | 4,643 | 40.27% | 305 | 2.65% |
| 1976 | 5,429 | 45.79% | 6,226 | 52.51% | 202 | 1.70% |
| 1980 | 6,665 | 49.30% | 5,490 | 40.61% | 1,363 | 10.08% |
| 1984 | 7,259 | 53.24% | 6,313 | 46.30% | 62 | 0.45% |
| 1988 | 5,914 | 45.65% | 6,922 | 53.44% | 118 | 0.91% |
| 1992 | 6,062 | 44.79% | 5,531 | 40.87% | 1,940 | 14.34% |
| 1996 | 6,100 | 46.74% | 5,978 | 45.80% | 974 | 7.46% |
| 2000 | 8,358 | 58.01% | 5,741 | 39.85% | 309 | 2.14% |
| 2004 | 9,990 | 59.83% | 6,574 | 39.37% | 132 | 0.79% |
| 2008 | 9,256 | 54.34% | 7,421 | 43.57% | 355 | 2.08% |
| 2012 | 9,828 | 55.57% | 7,507 | 42.44% | 352 | 1.99% |
| 2016 | 10,962 | 61.53% | 5,482 | 30.77% | 1,372 | 7.70% |
| 2020 | 12,663 | 65.84% | 6,178 | 32.12% | 391 | 2.03% |
| 2024 | 13,289 | 67.92% | 5,928 | 30.30% | 349 | 1.78% |
Places adjacent to Marion County, Iowa | ||||||||||||||||
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Municipalities and communities ofMarion County, Iowa,United States | ||
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| Cities |  | |
| Unincorporated communities | ||
| Footnotes | ‡This populated place also has portions in an adjacent county or counties | |
| International | |
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| National | |
| Other | |
41°19′52″N93°06′08″W / 41.33111°N 93.10222°W /41.33111; -93.10222
