Township · Indiana
St. John Township, Indiana
St. John Township, township, in Lake County, Indiana. St. John Township had 72,006 residents on July 1, 2025 by the Census Bureau's estimate, up 4.3% since 2020; the 2020 Census counted 68,972 and the ACS 2020-2024 5-year estimates put it at 70,429 (±49). GEOID 1808966870.
Residents, July 2025 estimate
72,006
Census Bureau estimate (no margin published)
2020 Census count: 68,972 · ACS 2020-2024: 70,429 ±49
Median household income
$103,035
±$3,659 (90% margin)
Indiana: $71,957
Median home value
$336,900
±$7,363 (90% margin)
Indiana: $218,200
Median gross rent
$1,302
±$99 (90% margin)
Indiana: $1,062
Where is St. John Township and what county is it in?
St. John Township is a township in Lake County, Indiana. It covers 39.3 square miles of land, 1,757 residents per square mile in 2020.
3 places lie inside St. John Township: Schererville (town, 29,646 in 2020), St. John (town, 20,303 in 2020) and Dyer (town, 16,517 in 2020). Part of Griffith (town) also lies in it.
St. John Township is in the Chicago-Naperville-Elgin, IL-IN metropolitan statistical area, which takes in 13 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 St. John Township, and is it growing?
The Census Bureau estimates that 72,006 people lived in St. John Township on July 1, 2025, up 4.3% since 2020, faster than Indiana (+2.8%). The 2020 Census counted 68,972 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 70,429 (±49).
| Measure | St. John Township | Lake County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 70,429±49 | 500,379 | +3,027 |
| Households | 27,145±563 | 195,130 | +1,568 |
| Average household size | 2.57±0.05 | 2.54 | no clear change |
| Housing units | 27,851±493 | 217,436 | +1,398 |
St. John Township's population since 2000
From 53,701 in 2000 to 72,006 in 2025: up 34.1%. The 2000, 2010 and 2020 figures are census counts, each for St. John 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 St. John Township?
The median resident of St. John Township is 44.6 years old; 20.7% are under 18 and 21.3% are 65 or older. The largest group is non-Hispanic white residents at 75.9%, then Hispanic or Latino residents (of any race) at 13.8%. 7.5% of residents were born outside the United States.
| Measure | St. John Township | Lake County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 44.6±1.2 | 39.7 | no clear change |
| Under 18 years | 20.7%±0.9 pts | 23.2% | – |
| 65 years and over | 21.3%±1.3 pts | 17.9% | – |
| Male | 48.2%±1.2 pts | 48.7% | – |
| Hispanic or Latino (any race) | 13.8%±1.3 pts | 20.9% | +2.4 pts |
| White alone, not Hispanic | 75.9%±2.0 pts | 51.4% | −3.7 pts |
| Black or African American alone, not Hispanic | 4.6%±1.0 pts | 22.7% | no clear change |
| Asian alone, not Hispanic | 2.1%±0.7 pts | 1.6% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.1%±0.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.6%±0.8 pts | 2.9% | – |
| Some other race alone, not Hispanic | 0.8%±0.7 pts | 0.4% | – |
| Born outside the United States | 7.5%±1.1 pts | 7.3% | no clear change |
| Speak a language other than English at home (age 5+) | 12.9%±1.6 pts | 15.1% | – |
| Civilian veterans (age 18+) | 5.3%±0.6 pts | 5.8% | – |
| With a disability | 10.7%±1.1 pts | 13.6% | – |
| No health insurance coverage | 3.0%±0.8 pts | 6.6% | no clear change |
| High school graduate or higher (age 25+) | 95.2%±1.0 pts | 90.2% | – |
| Bachelor's degree or higher (age 25+) | 36.5%±2.1 pts | 25.8% | +2.9 pts |
| Graduate or professional degree (age 25+) | 12.8%±1.4 pts | 8.5% | – |
| Lived in the same house a year earlier | 94.1%±1.1 pts | 90.5% | – |
| Moved from another state in the past year | 2.0%±0.6 pts | 2.9% | – |
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 St. John Township earn?
Half of St. John Township's 27,145 households earn less than $103,035 a year (±$3,659), against $71,493 in Lake County and $71,957 in Indiana. In 2015-2019 it was $104,333 in 2024 dollars; the margins of error cannot tell the two periods apart. 5.9% of residents live below the poverty line.
| Measure | St. John Township | Lake County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $103,035±$3,659 | $71,493 | no clear change |
| Mean household income | $126,791±$5,461 | $93,636 | – |
| Per capita income | $49,806±$2,104 | $37,284 | no clear change |
| People below the poverty line | 5.9%±1.4 pts | 14.3% | +1.7 pts |
| Children under 18 below the poverty line | 7.3%±3.1 pts | 21.6% | no clear change |
| Households receiving SNAP | 3.7%±1.5 pts | 12.9% | – |
| Households with a computer | 96.7%±0.8 pts | 94.1% | – |
| Households with a broadband subscription | 93.5%±1.6 pts | 89.7% | – |
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 St. John Township?
Owners occupy 87.0% of St. John Township's occupied homes and renters 13.0%. The median owner-occupied home is valued at $336,900 by its owner (±$7,363). The median renter pays $1,302 a month including utilities, and 43.0% of renters pay 35% or more of their income on rent.
| Measure | St. John Township | Lake County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $336,900±$7,363 | $230,600 | +$46,333 |
| Median gross rent | $1,302±$99 | $1,131 | no clear change |
| Renters paying 35% or more of income on rent | 43.0%±8.9 pts | 44.8% | no clear change |
| Median monthly owner costs, with a mortgage | $1,796±$65 | $1,529 | – |
| Owner-occupied homes | 87.0%±2.1 pts | 71.7% | no clear change |
| Renter-occupied homes | 13.0%±2.1 pts | 28.3% | – |
| Housing units | 27,851±493 | 217,436 | +1,398 |
| Homeowner vacancy rate | 0.0%±0.1 pts | 0.6% | – |
| Rental vacancy rate | 2.6%±3.5 pts | 5.1% | – |
| Single-family detached homes | 72.4%±2.0 pts | 71.3% | – |
| Mobile homes | 0.1%±0.1 pts | 1.5% | – |
| Built 2020 or later | 1.4%±0.6 pts | 1.1% | – |
| Built 2010 to 2019 | 8.0%±1.2 pts | 5.7% | – |
| Built 1939 or earlier | 2.5%±0.8 pts | 14.6% | – |
| Households with no vehicle | 2.5%±0.8 pts | 7.2% | – |
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 St. John Township work and get to work?
80.1% of St. John Township's workers drive alone and 12.2% work from home. The average trip to work takes 31.1 minutes. The unemployment rate in 2020-2024 averaged 4.2%.
| Measure | St. John Township | Lake County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 63.5%±1.5 pts | 61.1% | – |
| Unemployment rate | 4.2%±1.2 pts | 6.1% | no clear change |
| Drove alone to work | 80.1%±1.6 pts | 79.6% | – |
| Carpooled | 4.7%±0.8 pts | 8.0% | – |
| Public transportation | 1.5%±0.5 pts | 1.4% | – |
| Walked | 0.9%±0.4 pts | 1.2% | – |
| Worked from home | 12.2%±1.3 pts | 8.2% | +8.3 pts |
| Mean travel time to work | 31.1 min±1.2 | 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 St. John Township?
14 census tracts lie mostly in St. John Township (2020 census blocks). Their median household incomes run from $66,997 (Tract 426.06) to $157,957 (Tract 426.11).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 426.02Lake County | 7,232 | $121,444 |
| Tract 426.07Lake County | 6,422 | $84,063 |
| Tract 427.02Lake County | 6,083 | $82,276 |
| Tract 428.02Lake County | 5,507 | $123,246 |
| Tract 426.11Lake County | 5,429 | $157,957 |
| Tract 428.03Lake County | 5,349 | $98,277 |
| Tract 426.08Lake County | 4,929 | $126,875 |
| Tract 427.03Lake County | 4,786 | $84,006 |
| Tract 426.12Lake County | 4,725 | $130,246 |
| Tract 426.13Lake County | 4,478 | $109,886 |
| Tract 428.04Lake County | 4,417 | $98,295 |
| Tract 426.10Lake County | 4,333 | $130,114 |
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 St. John Township) · Census block assignment files
How does St. John Township compare with other places in Indiana?
By the Census Bureau's July 2025 estimates, St. John Township is the 77th-most populous of the 16,079 U.S. towns and townships that have one and the 15th-most populous of 1,001 in Indiana.
St. John Township ranks 104th 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 | 15th | 1,001 |
| Growth 2020-2025 (PEP) | 144th | 1,056 |
| Residents per square mile | 125th | 1,088 |
| Median household income | 104th | 1,072 |
| Per capita income | 81st | 1,087 |
| Median home value | 54th | 1,075 |
| Median gross rent | 78th | 904 |
| Poverty rate | 628th | 736 |
| Bachelor's degree or higher | 108th | 1,029 |
| Median age | 275th | 1,083 |
| Owner-occupied share | 336th | 1,087 |
| Work from home | 164th | 595 |
| Travel time to work | 188th | 1,088 |
St. John Township's figures with every place in Indiana (CSV)
Every place in Indiana, sortable · Compare St. John 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 St. John Township?
6 of the 57 figures for St. John 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 St. John 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.