Township · Michigan
Cottrellville Township, Michigan
Cottrellville Township, township, in St. Clair County, Michigan. Cottrellville Township had 3,469 residents on July 1, 2025 by the Census Bureau's estimate, up 1.7% since 2020; the 2020 Census counted 3,406 and the ACS 2020-2024 5-year estimates put it at 3,409 (±18). GEOID 2614718400.
Residents, July 2025 estimate
3,469
Census Bureau estimate (no margin published)
2020 Census count: 3,406 · ACS 2020-2024: 3,409 ±18
Median household income
$91,897
±$10,791 (90% margin)
Michigan: $72,875
Median home value
$293,900
±$38,100 (90% margin)
Michigan: $231,600
Median gross rent
$965
±$137 (90% margin)
Michigan: $1,129
Where is Cottrellville Township and what county is it in?
Cottrellville Township is a township in St. Clair County, Michigan. It covers 20.9 square miles of land, 163 residents per square mile in 2020.
Cottrellville Township is in the Detroit-Warren-Dearborn, MI metropolitan statistical area, which takes in 6 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 Cottrellville Township, and is it growing?
The Census Bureau estimates that 3,469 people lived in Cottrellville Township on July 1, 2025, up 1.7% since 2020, faster than Michigan (+0.5%). The 2020 Census counted 3,406 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 3,409 (±18).
| Measure | Cottrellville Township | St. Clair County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,409±18 | 160,221 | −62 |
| Households | 1,242±126 | 67,816 | −205 |
| Average household size | 2.74±0.28 | 2.34 | +0.34 |
| Housing units | 1,394±140 | 72,799 | −236 |
Cottrellville Township's population since 2000
From 3,814 in 2000 to 3,469 in 2025: down 9.0%. The 2000, 2010 and 2020 figures are census counts, each for Cottrellville 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 Cottrellville Township?
The median resident of Cottrellville Township is 44.5 years old; 24.2% are under 18 and 20.2% are 65 or older. The largest group is non-Hispanic white residents at 97.6%, then non-Hispanic residents of two or more races at 2.0%.
| Measure | Cottrellville Township | St. Clair County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 44.5±5.7 | 44.5 | no clear change |
| Under 18 years | 24.2%±5.5 pts | 20.3% | – |
| 65 years and over | 20.2%±4.1 pts | 20.4% | – |
| Male | 51.9%±3.6 pts | 50.1% | – |
| Hispanic or Latino (any race) | 0.4%±0.6 pts | 3.7% | – |
| White alone, not Hispanic | 97.6%±1.9 pts | 89.7% | −2.4 pts |
| Black or African American alone, not Hispanic | 0.0%±0.9 pts | 2.1% | – |
| Asian alone, not Hispanic | 0.0%±0.9 pts | 0.5% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.9 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.9 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.0%±1.7 pts | 3.6% | – |
| Some other race alone, not Hispanic | 0.0%±0.9 pts | 0.3% | – |
| Born outside the United States | 0.4%±0.5 pts | 2.0% | – |
| Speak a language other than English at home (age 5+) | 0.2%±0.3 pts | 2.5% | – |
| Civilian veterans (age 18+) | 8.4%±3.3 pts | 7.1% | – |
| With a disability | 18.5%±3.5 pts | 16.9% | – |
| No health insurance coverage | 1.6%±1.9 pts | 4.9% | – |
| High school graduate or higher (age 25+) | 95.6%±3.3 pts | 92.0% | – |
| Bachelor's degree or higher (age 25+) | 23.9%±6.8 pts | 20.3% | no clear change |
| Graduate or professional degree (age 25+) | 8.2%±5.2 pts | 7.5% | – |
| Lived in the same house a year earlier | 95.2%±2.9 pts | 90.5% | – |
| Moved from another state in the past year | 0.0%±0.9 pts | 0.7% | – |
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 Cottrellville Township earn?
Half of Cottrellville Township's 1,242 households earn less than $91,897 a year (±$10,791), against $71,270 in St. Clair County and $72,875 in Michigan. In 2015-2019 the median was $63,920 in 2024 dollars, so it rose by $27,977 after inflation.
| Measure | Cottrellville Township | St. Clair County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $91,897±$10,791 | $71,270 | +$27,977 |
| Mean household income | $112,964±$17,170 | $90,649 | – |
| Per capita income | $40,472±$8,735 | $38,214 | no clear change |
| People below the poverty line | 5.0%±3.9 pts | 11.3% | – |
| Children under 18 below the poverty line | 9.3%±10.3 pts | 15.7% | – |
| Households receiving SNAP | 9.4%±5.8 pts | 13.3% | – |
| Households with a computer | 94.0%±4.7 pts | 94.9% | – |
| Households with a broadband subscription | 90.7%±5.0 pts | 90.9% | – |
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 Cottrellville Township?
Owners occupy 97.2% of Cottrellville Township's occupied homes and renters 2.8%. The median owner-occupied home is valued at $293,900 by its owner (±$38,100). The median renter pays $965 a month including utilities.
| Measure | Cottrellville Township | St. Clair County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $293,900±$38,100 | $224,600 | no clear change |
| Median gross rent | $965±$137 | $1,029 | −$234 |
| Renters paying 35% or more of income on rent | 0.0%±48.2 pts | 44.7% | – |
| Median monthly owner costs, with a mortgage | $1,905±$257 | $1,469 | – |
| Owner-occupied homes | 97.2%±3.0 pts | 80.8% | +5.9 pts |
| Renter-occupied homes | 2.8%±3.0 pts | 19.2% | – |
| Housing units | 1,394±140 | 72,799 | −236 |
| Homeowner vacancy rate | 0.0%±2.5 pts | 0.5% | – |
| Rental vacancy rate | 32.7%±43.6 pts | 3.5% | – |
| Single-family detached homes | 84.5%±6.0 pts | 79.1% | – |
| Mobile homes | 14.5%±6.1 pts | 6.5% | – |
| Built 2020 or later | 0.8%±1.1 pts | 1.0% | – |
| Built 2010 to 2019 | 1.5%±1.6 pts | 3.5% | – |
| Built 1939 or earlier | 16.2%±6.6 pts | 17.0% | – |
| Households with no vehicle | 1.8%±1.9 pts | 5.9% | – |
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 many new homes is Cottrellville Township building?
Builders took permits for 11 new housing units in Cottrellville Township in 2025 (11 in single-family houses), 3.2 per 1,000 residents against 2.3 across Michigan.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Cottrellville Township work and get to work?
69.3% of Cottrellville Township's workers drive alone and 9.4% work from home. The average trip to work takes 33.3 minutes.
| Measure | Cottrellville Township | St. Clair County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 58.5%±6.7 pts | 60.8% | – |
| Unemployment rate | 1.1%±1.4 pts | 5.7% | – |
| Drove alone to work | 69.3%±8.5 pts | 79.9% | – |
| Carpooled | 19.0%±9.1 pts | 8.8% | – |
| Public transportation | 0.0%±1.8 pts | 1.1% | – |
| Walked | 1.7%±1.7 pts | 1.1% | – |
| Worked from home | 9.4%±4.2 pts | 7.7% | – |
| Mean travel time to work | 33.3 min±5.0 | 28.5 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 Cottrellville Township?
1 census tract lies mostly in Cottrellville Township, and 1 more reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 6450St. Clair County | 3,367 | $91,121 |
| Tract 6440St. Clair County | 4,070 | $68,232 |
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 Cottrellville Township) · Census block assignment files
How does Cottrellville Township compare with other places in Michigan?
By the Census Bureau's July 2025 estimates, Cottrellville Township is the 3,177th-most populous of the 16,079 U.S. towns and townships that have one and the 336th-most populous of 1,240 in Michigan.
Cottrellville Township ranks 255th of 1,354 places in Michigan with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 336th | 1,240 |
| Growth 2020-2025 (PEP) | 428th | 1,281 |
| Residents per square mile | 641st | 1,356 |
| Median household income | 255th | 1,354 |
| Per capita income | 484th | 1,355 |
| Median home value | 248th | 1,354 |
| Median gross rent | 622nd | 1,212 |
| Bachelor's degree or higher | 612th | 1,350 |
| Median age | 573rd | 1,356 |
| Owner-occupied share | 42nd | 1,356 |
| Work from home | 634th | 1,062 |
| Travel time to work | 135th | 1,356 |
Cottrellville Township's figures with every place in Michigan (CSV)
Every place in Michigan, sortable · Compare Cottrellville 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 Cottrellville Township?
23 of the 57 figures for Cottrellville 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 Cottrellville 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.