ZIP Code Tabulation Area · Indiana

ZIP Code 46373: St. John, IN

ZIP Code 46373 (St. John, Lake County, Indiana) has an estimated 18,843 residents in 6,658 households. The median household income is $127,146, the median home value is $408,900 and the median gross rent is $981/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Total population

18,843

Margin of error ±919

Median household income

$127,146

Margin of error ±$12,575

Median home value

$408,900

Margin of error ±$17,411

Median gross rent

$981/mo

Margin of error ±$203

Median age

44.4 yrs

Margin of error ±3.3 yrs

Mean travel time to work

30.9 min

Margin of error ±3.9 min

How ZIP 46373 compares with Indiana and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 4637344.4 yrsIndiana38.1 yrsUnited States38.9 yrs

Median household income

ZIP 46373$127,146Indiana$71,957United States$80,734

Per capita income

ZIP 46373$56,346Indiana$38,351United States$44,673

Poverty rate

ZIP 463732.8%Indiana12.3%United States12.5%

Unemployment rate

ZIP 463732.7%Indiana4.3%United States5.2%

Bachelor's degree or higher

ZIP 4637342.5%Indiana29.5%United States35.7%

Median home value

ZIP 46373$408,900Indiana$218,200United States$332,700

Median gross rent

ZIP 46373$981/moIndiana$1,062/moUnited States$1,413/mo

Owner-occupied homes

ZIP 4637397.1%Indiana70.6%United States65.2%

Mean travel time to work

ZIP 4637330.9 minIndiana24.1 minUnited States26.4 min

Worked from home

ZIP 4637313.5%Indiana10.7%United States15.1%

All figures for ZIP 46373

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 46373 — ACS 2020–2024 5-year estimates
Measure	ZIP 46373	Margin of error	Indiana	United States
Total population	18,843	±919	6,851,073	334,922,499
Median age	44.4 yrs	±3.3 yrs	38.1 yrs	38.9 yrs
Households	6,658	±441	2,716,009	129,227,496
Median household income	$127,146	±$12,575	$71,957	$80,734
Per capita income	$56,346	±$3,781	$38,351	$44,673
Poverty rate	2.8%	±1.4 pts	12.3%	12.5%
Unemployment rate	2.7%	±1.1 pts	4.3%	5.2%
Bachelor's degree or higher	42.5%	±4.1 pts	29.5%	35.7%
Median home value	$408,900	±$17,411	$218,200	$332,700
Median gross rent	$981/mo	±$203	$1,062/mo	$1,413/mo
Owner-occupied homes	97.1%	±2.1 pts	70.6%	65.2%
Mean travel time to work	30.9 min	±3.9 min	24.1 min	26.4 min
Worked from home	13.5%	±2.1 pts	10.7%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 46373
Group	ZIP 46373	Indiana	United States
White alone, not Hispanic or Latino	80.9%	75.4%	57.4%
Black or African American alone, not Hispanic or Latino	2.1%	9.1%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.1%	0.1%	0.5%
Asian alone, not Hispanic or Latino	1.5%	2.6%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.0%	0.0%	0.2%
Some other race alone, not Hispanic or Latino	2.5%	0.4%	0.6%
Two or more races, not Hispanic or Latino	1.4%	3.8%	4.3%
Hispanic or Latino (of any race)	11.5%	8.6%	19.3%

Where ZIP 46373 is

State: Indiana
Main county: Lake County
Largest overlapping place: St. John (91% of the ZIP's land area)
Land area: 10.88 sq mi· about 1,732 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.