St. John, Lake County, Indiana
Town in Lake County, Indiana · ZIP 46307, 46311, 46373
- Lake County
- Within St. John Township
- Census data · ACS 2019-2023
- 3 public schools
- 24,250 (2024 estimate)Population
- 7,522Households
- $127,449Median household income
- $370,800Median home value
- 3Public schools
- 3ZIP codes
About St. John
This page shows only what has been published about St. John: Census facts with their sources first, then its businesses, jobs, events, people in public roles, housing and questions as they are added. Nothing here is written by the town government.
Town intelligenceOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 8,382 |
| 2010 | 14,850 |
| 2020 | 20,303 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, place level, state 18, retrieved November 14, 2026; Census 2010 Summary File 1: total population, place level, state 18, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, place level, state 18, retrieved November 14, 2026.
Median household income $127,449 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, place level, state 18, retrieved November 14, 2026.
- Owner occupied
- 7,380 units
- Renter occupied
- 142 units
- Vacancy rate
- 1.2%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, place level, state 18, retrieved November 14, 2026.
| Measure | St. John | Lake County | Indiana |
|---|---|---|---|
| Population | 21,639 | 498,990 | 6,811,752 |
| Median household income | $127,449 | $68,985 | $70,051 |
| Median age | 41.4 | 39.6 | 38.0 |
| Median home value | $370,800 | $214,700 | $201,600 |
| Bachelor’s degree or higher | 42.9% | 24.9% | 28.8% |
| Foreign-born residents | 5.7% | 7.2% | 5.9% |
| Owner-occupied homes | 98.1% | 70.9% | 70.4% |
| Mean commute to work | 32.4 minutes | 28.8 minutes | 24.0 minutes |
Source: American Community Survey 5-year data profile 2019–2023, place level, state 18, retrieved November 14, 2026.
CommunityRules and moderation
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Events in St. JohnAll events
No upcoming event is listed in St. John yet. Members and businesses add events from the Events page; each is screened before it shows.
Schools
| School | Type | Grades | District |
|---|---|---|---|
| Kolling Elementary School | Public | Pre-K–4 | Lake Central School Corporation |
| Hal E Clark Middle School | Public | 5–8 | Lake Central School Corporation |
| Lake Central High School | Public | 9–12 | Lake Central School Corporation |
Open public schools in the NCES directory for 2023–2024, placed by their listed location; private schools are not in the source. Enrollment and ratings are not shown.
Sources: NCES Common Core of Data, public school directory 2023–2024, retrieved November 14, 2026; NCES EDGE public school geocodes 2024–2025, retrieved November 14, 2026.
Legislative districts
| Chamber | District | Share of St. John |
|---|---|---|
| U.S. House of Representatives | Congressional District 1 (IN-1) | All |
| State legislature, lower chamber | State House District 14 | 2% |
| State legislature, lower chamber | State House District 15 | 95% |
| State legislature, lower chamber | State House District 19 | 3% |
| State legislature, upper chamber | State Senate District 1 | 97% |
| State legislature, upper chamber | State Senate District 6 | 3% |
Boundaries from the Census Bureau’s TIGER/Line district files, matched to St. John’s own boundary; a town split between districts lists each with the share of its land inside it. Who holds each seat appears on the People page once the official records are approved.
Sources: Census cartographic boundaries 2025: congressional districts, 119th Congress, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, upper chamber, state 18, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, lower chamber, state 18, retrieved November 14, 2026.
Frequently asked about St. JohnPromoted from questions people asked
No question about St. John has been asked often enough to publish an answer yet. Ask St. John and the answer, once a person checks it, appears here.
Nearby towns
- St. John TownshipTownship
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Other towns in Lake County
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- East ChicagoCity
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Other places named St. John in Indiana
- St. John TownshipTownship