Township · Indiana
Polk Township, Marshall County, Indiana
Polk Township, Marshall County, township, in Marshall County, Indiana. Polk Township, Marshall County had 2,743 residents on July 1, 2025 by the Census Bureau's estimate, down 1.1% since 2020; the 2020 Census counted 2,781 and the ACS 2020-2024 5-year estimates put it at 2,476 (±273). GEOID 1809960966.
Residents, July 2025 estimate
2,743
Census Bureau estimate (no margin published)
2020 Census count: 2,781 · ACS 2020-2024: 2,476 ±273
Median household income
$75,827
±$16,955 (90% margin)
Indiana: $71,957
Median home value
$231,300
±$24,419 (90% margin)
Indiana: $218,200
Median gross rent
$909
±$231 (90% margin)
Indiana: $1,062
Where is Polk Township, Marshall County and what county is it in?
Polk Township, Marshall County is a township in Marshall County, Indiana. It covers 42.1 square miles of land, 66 residents per square mile in 2020.
Part of Koontz Lake (CDP) also lies in it.
Polk Township, Marshall County is in the Plymouth, IN micropolitan statistical area (Census Bureau delineation, July 2023).
Polk Township, Marshall County is the same area as Census Tract 202.02 of Marshall County: the tract's figures are Polk Township, Marshall County's own.
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Polk Township, Marshall County, and is it growing?
The Census Bureau estimates that 2,743 people lived in Polk Township, Marshall County on July 1, 2025, down 1.1% since 2020, while Indiana grew 2.8%. The 2020 Census counted 2,781 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 2,476 (±273).
| Measure | Polk Township, Marshall County | Marshall County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 2,476±273 | 46,284 | −313 |
| Households | 1,049±133 | 17,758 | no clear change |
| Average household size | 2.36±0.21 | 2.57 | no clear change |
| Housing units | 1,239±144 | 20,111 | no clear change |
Polk Township, Marshall County's population since 2000
From 2,784 in 2000 to 2,743 in 2025: down 1.5%. The 2000, 2010 and 2020 figures are census counts, each for Polk Township, Marshall County as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Polk Township, Marshall County?
The median resident of Polk Township, Marshall County is 50.1 years old; 17.6% are under 18 and 20.6% are 65 or older. The largest group is non-Hispanic white residents at 95.4%, then non-Hispanic residents of two or more races at 2.9%.
| Measure | Polk Township, Marshall County | Marshall County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 50.1±4.5 | 39.8 | +6.8 |
| Under 18 years | 17.6%±3.3 pts | 24.5% | – |
| 65 years and over | 20.6%±3.7 pts | 19.0% | – |
| Male | 56.1%±3.2 pts | 50.5% | – |
| Hispanic or Latino (any race) | 1.4%±1.8 pts | 11.9% | – |
| White alone, not Hispanic | 95.4%±2.9 pts | 84.9% | no clear change |
| Black or African American alone, not Hispanic | 0.0%±1.5 pts | 0.6% | – |
| Asian alone, not Hispanic | 0.3%±0.5 pts | 0.6% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.5 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.5 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.9%±2.2 pts | 1.8% | – |
| Some other race alone, not Hispanic | 0.0%±1.5 pts | 0.1% | – |
| Born outside the United States | 2.4%±2.1 pts | 5.1% | – |
| Speak a language other than English at home (age 5+) | 2.5%±2.2 pts | 15.3% | – |
| Civilian veterans (age 18+) | 11.1%±4.9 pts | 6.2% | – |
| With a disability | 11.8%±3.5 pts | 12.9% | – |
| No health insurance coverage | 2.9%±2.4 pts | 12.9% | – |
| High school graduate or higher (age 25+) | 87.6%±5.5 pts | 85.4% | – |
| Bachelor's degree or higher (age 25+) | 14.4%±5.0 pts | 20.9% | no clear change |
| Graduate or professional degree (age 25+) | 5.5%±3.5 pts | 7.0% | – |
| Lived in the same house a year earlier | 94.1%±6.2 pts | 92.0% | – |
| Moved from another state in the past year | 0.2%±0.5 pts | 1.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Polk Township, Marshall County earn?
Half of Polk Township, Marshall County's 1,049 households earn less than $75,827 a year (±$16,955), against $71,808 in Marshall County and $71,957 in Indiana. In 2015-2019 it was $73,171 in 2024 dollars; the margins of error cannot tell the two periods apart. 14.9% of residents live below the poverty line.
| Measure | Polk Township, Marshall County | Marshall County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $75,827±$16,955 | $71,808 | no clear change |
| Mean household income | $90,724±$14,598 | $89,695 | – |
| Per capita income | $37,765±$5,810 | $34,462 | no clear change |
| People below the poverty line | 14.9%±9.3 pts | 11.7% | – |
| Children under 18 below the poverty line | 28.5%±22.5 pts | 16.6% | – |
| Households receiving SNAP | 5.4%±5.5 pts | 6.4% | – |
| Households with a computer | 93.0%±5.7 pts | 90.3% | – |
| Households with a broadband subscription | 82.4%±9.3 pts | 84.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Polk Township, Marshall County?
Owners occupy 89.7% of Polk Township, Marshall County's occupied homes and renters 10.3%. The median owner-occupied home is valued at $231,300 by its owner (±$24,419). The median renter pays $909 a month including utilities.
| Measure | Polk Township, Marshall County | Marshall County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $231,300±$24,419 | $204,900 | +$59,987 |
| Median gross rent | $909±$231 | $938 | no clear change |
| Renters paying 35% or more of income on rent | 46.3%±46.2 pts | 26.3% | – |
| Median monthly owner costs, with a mortgage | $1,484±$179 | $1,312 | – |
| Owner-occupied homes | 89.7%±7.2 pts | 76.4% | no clear change |
| Renter-occupied homes | 10.3%±7.2 pts | 23.6% | – |
| Housing units | 1,239±144 | 20,111 | no clear change |
| Homeowner vacancy rate | 0.0%±3.9 pts | 1.1% | – |
| Rental vacancy rate | 0.0%±28.6 pts | 2.7% | – |
| Single-family detached homes | 94.6%±4.5 pts | 82.1% | – |
| Mobile homes | 5.4%±4.5 pts | 6.0% | – |
| Built 2020 or later | 0.0%±3.0 pts | 1.3% | – |
| Built 2010 to 2019 | 6.1%±3.7 pts | 6.0% | – |
| Built 1939 or earlier | 20.4%±7.6 pts | 23.0% | – |
| Households with no vehicle | 4.8%±5.4 pts | 6.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Polk Township, Marshall County work and get to work?
85.4% of Polk Township, Marshall County's workers drive alone. The average trip to work takes 25.8 minutes.
| Measure | Polk Township, Marshall County | Marshall County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 64.3%±5.8 pts | 62.9% | – |
| Unemployment rate | 1.2%±1.5 pts | 2.6% | – |
| Drove alone to work | 85.4%±6.5 pts | 76.8% | – |
| Carpooled | 7.7%±5.0 pts | 10.1% | – |
| Public transportation | 0.0%±2.8 pts | 0.1% | – |
| Walked | 0.0%±2.8 pts | 3.3% | – |
| Worked from home | 6.1%±4.6 pts | 5.8% | – |
| Mean travel time to work | 25.8 min±1.9 | 22.3 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Polk Township, Marshall County?
1 census tract lies mostly in Polk Township, Marshall County, and 1 more reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 202.02Marshall County | 2,476 | $75,827 |
| Tract 202.01Marshall County | 4,018 | $72,688 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Polk Township, Marshall County) · Census block assignment files
How does Polk Township, Marshall County compare with other places in Indiana?
By the Census Bureau's July 2025 estimates, Polk Township, Marshall County is the 3,823rd-most populous of the 16,079 U.S. towns and townships that have one and the 387th-most populous of 1,001 in Indiana.
Polk Township, Marshall County ranks 442nd of 1,072 places in Indiana with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 387th | 1,001 |
| Growth 2020-2025 (PEP) | 939th | 1,056 |
| Residents per square mile | 768th | 1,088 |
| Median household income | 442nd | 1,072 |
| Per capita income | 393rd | 1,087 |
| Median home value | 329th | 1,075 |
| Median gross rent | 458th | 904 |
| Poverty rate | 219th | 736 |
| Bachelor's degree or higher | 807th | 1,029 |
| Median age | 105th | 1,083 |
| Owner-occupied share | 248th | 1,087 |
| Travel time to work | 499th | 1,088 |
Polk Township, Marshall County's figures with every place in Indiana (CSV)
Every place in Indiana, sortable · Compare Polk Township, Marshall County with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Polk Township, Marshall County?
24 of the 57 figures for Polk Township, Marshall County on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Polk Township, Marshall County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.