Township · Missouri
Marion Township, Mercer County, Missouri
Marion Township, Mercer County, township, in Mercer County, Missouri. Marion Township, Mercer County had 697 residents on July 1, 2025 by the Census Bureau's estimate, down 3.6% since 2020; the 2020 Census counted 709 and the ACS 2020-2024 5-year estimates put it at 781 (±161). GEOID 2912946082.
Residents, July 2025 estimate
697
Census Bureau estimate (no margin published)
2020 Census count: 709 · ACS 2020-2024: 781 ±161
Median household income
$53,851
±$3,494 (90% margin)
Missouri: $70,702
Median home value
$69,600
±$34,378 (90% margin)
Missouri: $230,300
Median gross rent
$585
±$186 (90% margin)
Missouri: $1,033
Where is Marion Township, Mercer County and what county is it in?
Marion Township, Mercer County is a township in Mercer County, Missouri. It covers 51.7 square miles of land, 14 residents per square mile in 2020.
2 places lie inside Marion Township (Mercer County): Mercer (town, 263 in 2020) and South Lineville (town, 13 in 2020).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Marion Township, Mercer County, and is it growing?
The Census Bureau estimates that 697 people lived in Marion Township, Mercer County on July 1, 2025, down 3.6% since 2020, while Missouri grew 1.9%. The 2020 Census counted 709 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 781 (±161).
| Measure | Marion Township, Mercer County | Mercer County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 781±161 | 3,482 | no clear change |
| Households | 338±58 | 1,302 | no clear change |
| Average household size | 2.31±0.37 | 2.62 | no clear change |
| Housing units | 611±80 | 1,902 | no clear change |
Marion Township, Mercer County's population since 2000
From 910 in 2000 to 697 in 2025: down 23.4%. The 2000, 2010 and 2020 figures are census counts, each for Marion Township, Mercer 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 Marion Township, Mercer County?
The median resident of Marion Township, Mercer County is 50.2 years old; 21.8% are under 18 and 24.7% are 65 or older. The largest group is non-Hispanic white residents at 95.8%, then Hispanic or Latino residents (of any race) at 2.7%.
| Measure | Marion Township, Mercer County | Mercer County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 50.2±10.1 | 42.4 | no clear change |
| Under 18 years | 21.8%±9.2 pts | 24.5% | – |
| 65 years and over | 24.7%±6.9 pts | 22.3% | – |
| Male | 48.8%±4.9 pts | 49.3% | – |
| Hispanic or Latino (any race) | 2.7%±3.6 pts | 4.8% | – |
| White alone, not Hispanic | 95.8%±4.2 pts | 91.1% | no clear change |
| Black or African American alone, not Hispanic | 0.0%±4.4 pts | 0.2% | – |
| Asian alone, not Hispanic | 1.4%±2.0 pts | 0.9% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±4.4 pts | 0.3% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±4.4 pts | 0.1% | – |
| Two or more races, not Hispanic | 0.1%±0.4 pts | 2.6% | – |
| Some other race alone, not Hispanic | 0.0%±4.4 pts | 0.0% | – |
| Born outside the United States | 2.2%±2.3 pts | 3.6% | – |
| Speak a language other than English at home (age 5+) | 6.1%±3.7 pts | 7.5% | – |
| Civilian veterans (age 18+) | 8.7%±4.1 pts | 8.5% | – |
| With a disability | 11.3%±4.7 pts | 16.6% | – |
| No health insurance coverage | 5.8%±3.8 pts | 9.2% | −7.7 pts |
| High school graduate or higher (age 25+) | 91.8%±4.4 pts | 90.8% | – |
| Bachelor's degree or higher (age 25+) | 14.7%±8.1 pts | 18.1% | no clear change |
| Graduate or professional degree (age 25+) | 1.8%±1.9 pts | 5.4% | – |
| Lived in the same house a year earlier | 92.5%±5.5 pts | 88.6% | – |
| Moved from another state in the past year | 4.0%±3.9 pts | 2.7% | – |
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 Marion Township, Mercer County earn?
Half of Marion Township, Mercer County's 338 households earn less than $53,851 a year (±$3,494), against $62,679 in Mercer County and $70,702 in Missouri. In 2015-2019 the median was $31,537 in 2024 dollars, so it rose by $22,314 after inflation. 7.9% of residents live below the poverty line.
| Measure | Marion Township, Mercer County | Mercer County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $53,851±$3,494 | $62,679 | +$22,314 |
| Mean household income | $59,041±$7,894 | $70,588 | – |
| Per capita income | $24,876±$3,019 | $27,204 | no clear change |
| People below the poverty line | 7.9%±4.6 pts | 13.5% | −8.2 pts |
| Children under 18 below the poverty line | 4.1%±10.3 pts | 18.7% | – |
| Households receiving SNAP | 5.3%±3.1 pts | 10.7% | – |
| Households with a computer | 89.1%±6.5 pts | 88.9% | – |
| Households with a broadband subscription | 79.3%±8.0 pts | 81.0% | – |
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 Marion Township, Mercer County?
Owners occupy 81.7% of Marion Township, Mercer County's occupied homes and renters 18.3%. The median owner-occupied home is valued at $69,600 by its owner (±$34,378). The median renter pays $585 a month including utilities.
| Measure | Marion Township, Mercer County | Mercer County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $69,600±$34,378 | $104,900 | no clear change |
| Median gross rent | $585±$186 | $590 | no clear change |
| Renters paying 35% or more of income on rent | 23.9%±16.7 pts | 14.6% | – |
| Median monthly owner costs, with a mortgage | $919±$257 | $1,069 | – |
| Owner-occupied homes | 81.7%±7.1 pts | 81.0% | +14.7 pts |
| Renter-occupied homes | 18.3%±7.1 pts | 19.0% | – |
| Housing units | 611±80 | 1,902 | no clear change |
| Homeowner vacancy rate | 0.0%±11.3 pts | 0.0% | – |
| Rental vacancy rate | 0.0%±39.1 pts | 6.4% | – |
| Single-family detached homes | 83.6%±5.8 pts | 84.0% | – |
| Mobile homes | 8.5%±4.4 pts | 6.4% | – |
| Built 2020 or later | 0.5%±1.0 pts | 0.7% | – |
| Built 2010 to 2019 | 5.2%±4.6 pts | 6.0% | – |
| Built 1939 or earlier | 9.7%±3.9 pts | 15.4% | – |
| Households with no vehicle | 5.6%±4.1 pts | 5.6% | – |
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 Marion Township, Mercer County work and get to work?
74.9% of Marion Township, Mercer County's workers drive alone. The average trip to work takes 24.7 minutes.
| Measure | Marion Township, Mercer County | Mercer County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 60.3%±8.0 pts | 57.3% | – |
| Unemployment rate | 3.3%±2.4 pts | 3.5% | – |
| Drove alone to work | 74.9%±8.1 pts | 73.0% | – |
| Carpooled | 12.8%±8.8 pts | 10.4% | – |
| Public transportation | 1.7%±2.2 pts | 0.4% | – |
| Walked | 1.7%±2.7 pts | 1.2% | – |
| Worked from home | 8.8%±8.4 pts | 13.2% | – |
| Mean travel time to work | 24.7 min±3.6 | 22.6 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 Marion Township, Mercer County?
No census tract lies mostly in Marion Township, Mercer County; 2 tracts reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 4701Mercer County | 1,214 | $53,682 |
| Tract 4702Mercer County | 2,268 | $71,776 |
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 Marion Township, Mercer County) · Census block assignment files
How does Marion Township, Mercer County compare with other places in Missouri?
By the Census Bureau's July 2025 estimates, Marion Township, Mercer County is the 9,019th-most populous of the 16,079 U.S. towns and townships that have one and the 76th-most populous of 280 in Missouri.
Marion Township, Mercer County is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 76th | 280 |
Marion Township, Mercer County's figures with every place in Missouri (CSV)
Every place in Missouri, sortable · Compare Marion Township, Mercer 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 Marion Township, Mercer County?
22 of the 57 figures for Marion Township, Mercer 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 Marion Township, Mercer 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.