Township · Illinois
Marine Township, Illinois
Marine Township, township, in Madison County, Illinois. Marine Township had 2,282 residents on July 1, 2025 by the Census Bureau's estimate, up 2.4% since 2020; the 2020 Census counted 2,247 and the ACS 2020-2024 5-year estimates put it at 2,142 (±303). GEOID 1711946877.
Residents, July 2025 estimate
2,282
Census Bureau estimate (no margin published)
2020 Census count: 2,247 · ACS 2020-2024: 2,142 ±303
Median household income
$98,194
±$14,114 (90% margin)
Illinois: $83,390
Median home value
$217,900
±$28,227 (90% margin)
Illinois: $263,300
Median gross rent
$944
±$199 (90% margin)
Illinois: $1,274
Where is Marine Township and what county is it in?
Marine Township is a township in Madison County, Illinois. It covers 35.3 square miles of land, 64 residents per square mile in 2020.
One place lies inside Marine Township: Marine (village, 912 in 2020).
Marine Township is in the St. Louis, MO-IL metropolitan statistical area, which takes in 15 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Marine Township, and is it growing?
The Census Bureau estimates that 2,282 people lived in Marine Township on July 1, 2025, up 2.4% since 2020, while Illinois shrank 0.8%. The 2020 Census counted 2,247 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 2,142 (±303).
| Measure | Marine Township | Madison County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 2,142±303 | 264,238 | no clear change |
| Households | 774±109 | 110,134 | no clear change |
| Average household size | 2.77±0.27 | 2.35 | no clear change |
| Housing units | 790±110 | 119,168 | no clear change |
Marine Township's population since 2000
From 1,922 in 2000 to 2,282 in 2025: up 18.7%. The 2000, 2010 and 2020 figures are census counts, each for Marine Township 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 Marine Township?
The median resident of Marine Township is 38.8 years old; 28.8% are under 18 and 15.9% are 65 or older. The largest group is non-Hispanic white residents at 86.0%, then Hispanic or Latino residents (of any race) at 8.2%.
| Measure | Marine Township | Madison County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 38.8±4.8 | 40.2 | no clear change |
| Under 18 years | 28.8%±4.5 pts | 21.3% | – |
| 65 years and over | 15.9%±5.2 pts | 18.5% | – |
| Male | 52.4%±5.2 pts | 48.9% | – |
| Hispanic or Latino (any race) | 8.2%±5.1 pts | 4.3% | – |
| White alone, not Hispanic | 86.0%±6.8 pts | 81.8% | −11.8 pts |
| Black or African American alone, not Hispanic | 0.0%±1.7 pts | 7.7% | – |
| Asian alone, not Hispanic | 1.9%±2.8 pts | 0.8% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.7 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.7 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.5%±3.5 pts | 5.0% | – |
| Some other race alone, not Hispanic | 0.5%±0.8 pts | 0.2% | – |
| Born outside the United States | 1.8%±2.8 pts | 2.2% | – |
| Speak a language other than English at home (age 5+) | 2.1%±2.5 pts | 3.6% | – |
| Civilian veterans (age 18+) | 7.3%±3.5 pts | 8.2% | – |
| With a disability | 12.0%±4.5 pts | 15.8% | – |
| No health insurance coverage | 1.0%±0.9 pts | 4.7% | – |
| High school graduate or higher (age 25+) | 95.3%±3.2 pts | 93.9% | – |
| Bachelor's degree or higher (age 25+) | 34.2%±10.1 pts | 31.0% | no clear change |
| Graduate or professional degree (age 25+) | 8.7%±3.8 pts | 11.2% | – |
| Lived in the same house a year earlier | 96.1%±3.2 pts | 88.5% | – |
| Moved from another state in the past year | 0.1%±0.3 pts | 2.1% | – |
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 Marine Township earn?
Half of Marine Township's 774 households earn less than $98,194 a year (±$14,114), against $75,793 in Madison County and $83,390 in Illinois. In 2015-2019 it was $91,448 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Marine Township | Madison County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $98,194±$14,114 | $75,793 | no clear change |
| Mean household income | $107,506±$11,711 | $98,419 | – |
| Per capita income | $40,659±$6,367 | $41,560 | no clear change |
| People below the poverty line | 2.9%±2.0 pts | 11.1% | – |
| Children under 18 below the poverty line | 0.8%±0.9 pts | 13.2% | – |
| Households receiving SNAP | 11.8%±6.9 pts | 13.7% | – |
| Households with a computer | 95.3%±4.4 pts | 94.9% | – |
| Households with a broadband subscription | 94.7%±4.9 pts | 91.0% | – |
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 Marine Township?
Owners occupy 88.9% of Marine Township's occupied homes and renters 11.1%. The median owner-occupied home is valued at $217,900 by its owner (±$28,227). The median renter pays $944 a month including utilities.
| Measure | Marine Township | Madison County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $217,900±$28,227 | $173,000 | no clear change |
| Median gross rent | $944±$199 | $1,024 | no clear change |
| Renters paying 35% or more of income on rent | 10.5%±9.3 pts | 37.8% | – |
| Median monthly owner costs, with a mortgage | $1,667±$116 | $1,511 | – |
| Owner-occupied homes | 88.9%±4.5 pts | 74.2% | no clear change |
| Renter-occupied homes | 11.1%±4.5 pts | 25.8% | – |
| Housing units | 790±110 | 119,168 | no clear change |
| Homeowner vacancy rate | 0.0%±5.2 pts | 1.0% | – |
| Rental vacancy rate | 0.0%±33.7 pts | 4.1% | – |
| Single-family detached homes | 87.1%±4.5 pts | 78.9% | – |
| Mobile homes | 4.3%±3.0 pts | 2.2% | – |
| Built 2020 or later | 0.0%±4.6 pts | 0.9% | – |
| Built 2010 to 2019 | 6.6%±5.2 pts | 6.0% | – |
| Built 1939 or earlier | 10.3%±4.4 pts | 14.6% | – |
| Households with no vehicle | 0.0%±4.7 pts | 5.7% | – |
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 Marine Township work and get to work?
84.9% of Marine Township's workers drive alone. The average trip to work takes 27.2 minutes.
| Measure | Marine Township | Madison County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 64.7%±5.6 pts | 62.7% | – |
| Unemployment rate | 3.2%±3.8 pts | 4.6% | – |
| Drove alone to work | 84.9%±8.7 pts | 78.1% | – |
| Carpooled | 8.8%±7.0 pts | 6.6% | – |
| Public transportation | 0.0%±3.6 pts | 0.6% | – |
| Walked | 1.2%±1.0 pts | 1.1% | – |
| Worked from home | 5.1%±3.9 pts | 12.7% | – |
| Mean travel time to work | 27.2 min±2.7 | 24.9 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 Marine Township?
1 census tract lies mostly in Marine Township, and 1 more reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 4037.01Madison County | 6,670 | $135,774 |
| Tract 4037.02Madison County | 6,001 | $138,798 |
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 Marine Township) · Census block assignment files
How does Marine Township compare with other places in Illinois?
By the Census Bureau's July 2025 estimates, Marine Township is the 4,391st-most populous of the 16,079 U.S. towns and townships that have one and the 398th-most populous of 1,407 in Illinois.
Marine Township ranks 367th of 1,380 places in Illinois with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 398th | 1,407 |
| Growth 2020-2025 (PEP) | 106th | 1,347 |
| Residents per square mile | 1,105th | 1,383 |
| Median household income | 367th | 1,380 |
| Per capita income | 582nd | 1,383 |
| Median home value | 510th | 1,379 |
| Median gross rent | 658th | 1,280 |
| Bachelor's degree or higher | 369th | 1,369 |
| Median age | 968th | 1,383 |
| Owner-occupied share | 234th | 1,382 |
| Travel time to work | 537th | 1,382 |
Marine Township's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare Marine Township 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 Marine Township?
24 of the 57 figures for Marine Township 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 Marine Township 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.