46373 ZIP Code — Saint John, IN

Lake County, Indiana

ZIP code 46373 is located in Saint John, Indiana, within Lake County. It covers approximately 10.88 square miles and serves a population of 17,741 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 219.

About ZIP code 46373

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $351,700. Owner-occupancy is high at 97%, well above the national average.

The gap between median ($117,632) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 2% is below the national average. 34% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 34 minutes is near the national average.

Educational attainment is near the national average, with 39% of residents holding a bachelor's degree or higher.

Overall, ZIP code 46373 reflects a community defined by high homeownership and a significant Social Security-dependent population.

17,741

population

10.88

sq mi land

Standard

ZIP type

Central (CT)

timezone

46373 ZIP code map

Cities in ZIP code 46373

Below are the cities the US Postal Service accepts for ZIP code 46373. Using any city not on this list may result in mail delivery delays.

City	Status
Saint John	Acceptable
Saint John	Preferred

Nearby ZIP codes

46311 Dyer (1.7 mi) 46375 Schererville (3 mi) 46303 Cedar Lake (5.3 mi) 46319 Griffith (5.6 mi) 46322 Highland (6.7 mi) 60417 Crete (6.9 mi) 46321 Munster (7.1 mi) 60411 Chicago Heights (7.9 mi) 46408 Gary (8.3 mi) 46410 Merrillville (8.3 mi) 60475 Steger (8.4 mi) 46307 Crown Point (8.5 mi)

Demographics updated 05/2026

Population
Total population	17,741
Population density	1,631 / sq mi
State FIPS	18
County FIPS	089

Geography
Land area	10.88 sq mi
Water area	0.09 sq mi
Latitude	41.4500
Longitude	-87.4722
Timezone	Central (CT)
Area code	219

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	27.6%	43.6%	42.9%
$50k – $100k	23.6%	31.1%	32.7%
$100k – $200k	33.6%	21.2%	19.8%
Over $200k	15.2%	4.1%	4.5%

Demographics & statistics

17,741

Population

1,631

People per sq mi

45.6

Median age

$117,632

Median household income

$53,387

Per capita income

$351,700

Median home value

$897

Median monthly rent

97.2%

Home ownership

2.2%

Poverty rate

4.0%

Unemployment

6,325

Housing units

38.5%

Bachelor's or higher

Age distribution

Male Female

393

Under 5

394

452

5–9

454

728

10–14

731

531

15–19

532

588

20–24

590

670

25–34

673

1,007

35–44

1,010

1,432

45–54

1,436

666

55–59

669

731

60–64

734

1,019

65–74

1,023

517

75–84

518

121

85+

122

← Male

Female →

Age summary

Group	Count	%
Under 18	3,863	21.8%
18 and over	13,878	78.2%
65 and over	3,320	18.7%
Median age	45.6 years

Race & ethnicity

White 78.1%

Hispanic or Latino 7.6%

Other race 5.4%

Two or more races 3.9%

Black or African American 2.8%

Asian 1.8%

American Indian / Alaska Native 0.2%

Native Hawaiian / Pacific Islander 0.1%

Group	Count	%
White	15,006	78.1%
Hispanic or Latino	1,465	7.6%
Other race	1,032	5.4%
Two or more races	755	3.9%
Black or African American	546	2.8%
Asian	348	1.8%
American Indian / Alaska Native	32	0.2%
Native Hawaiian / Pacific Islander	22	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	27.6%	43.6%	42.9%
$50k – $100k	23.6%	31.1%	32.7%
$100k – $200k	33.6%	21.2%	19.8%
Over $200k	15.2%	4.1%	4.5%

Under $10k 2.0%

$10k–$15k 1.8%

$15k–$25k 2.7%

$25k–$35k 4.0%

$35k–$50k 8.8%

$50k–$75k 13.6%

$75k–$100k 10.8%

$100k–$150k 16.1%

$150k–$200k 13.7%

$200k+ 26.4%

Range	% of households
Under $10k	2.0%
$10k–$15k	1.8%
$15k–$25k	2.7%
$25k–$35k	4.0%
$35k–$50k	8.8%
$50k–$75k	13.6%
$75k–$100k	10.8%
$100k–$150k	16.1%
$150k–$200k	13.7%
$200k+	26.4%
Median income	$117,632

Housing

Home values

Under $50k 4.6%

$50k–$100k 1.5%

$100k–$150k 4.0%

$150k–$200k 3.6%

$200k–$300k 25.0%

$300k–$500k 43.2%

$500k–$1M 16.9%

$1M+ 1.2%

Housing overview

Metric	Value
Median home value	$351,700
Median rent / month	$897
Owner occupied	97.2%
Renter occupied	2.8%
Vacant	0.4%
Single-family detached	85.5%
Large apartment buildings	1.1%
Mobile homes	0.4%
Median rooms	6.8
Avg household size (owned)	2.77

Year built

Era	%
2020 or later	1.2%
2010–2019	19.5%
2000–2009	27.4%
1990–1999	20.5%
1980–1989	4.8%
1970–1979	12.2%
1960–1969	6.6%
1950–1959	2.0%
1940–1949	1.9%
1939 or earlier	3.8%

Bedrooms

Size	% of units
No bedroom (studio)	0.6%
1 bedroom	1.0%
2 bedrooms	13.8%
3 bedrooms	51.2%
4 bedrooms	26.6%
5+ bedrooms	6.8%

Vehicles per household

Vehicles	% of households
No vehicle	2.5%
1 vehicle	18.8%
2 vehicles	46.7%
3 or more	32.0%

Heating fuel

Fuel type	%
Utility gas	88.9%
Electricity	10.2%
Propane / LP gas	0.4%
Wood	0.4%
No fuel used	0.2%

Households & families

Household type	Count	%
Married-couple family	4,615	71.2%
Cohabiting couple	236	3.6%
Male householder, no spouse	635	9.8%
Female householder, no spouse	995	15.4%
Households with children under 18	2,181	33.7%
Households with seniors (65+)	2,477	38.2%
Average household size	2.73

Marital status

Status	Male	Female
Never married	26.2%	21.1%
Married	66.0%	61.9%
Separated	0.3%	1.2%
Widowed	3.2%	7.3%
Divorced	4.3%	8.6%

Education

Less than 9th grade 3.5%

Some HS, no diploma 2.4%

HS graduate 22.6%

Some college, no degree 21.9%

Associate's degree 11.2%

Bachelor's degree 25.8%

Graduate / professional 12.6%

Metric	%
HS diploma or higher	94.1%
Bachelor's or higher	38.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	220	5.2%
Kindergarten	186	4.4%
Elementary school	1,945	46.0%
High school	918	21.7%
College / grad school	961	22.7%

Employment

Industry of employment

Education & healthcare 22.3%

Manufacturing 14.6%

Professional & management 10.7%

Retail trade 8.6%

Construction 8.5%

Transportation & utilities 8.2%

Finance & real estate 8.2%

Arts, food & hospitality 5.4%

Other services 4.0%

Public administration 3.6%

Information 2.9%

Wholesale trade 2.4%

Agriculture & mining 0.6%

Occupation

Category	%
Management, business & arts	47.4%
Service	12.5%
Sales & office	20.3%
Natural resources & construction	6.9%
Production & transportation	12.9%

Employment type

Type	%
Private sector	85.7%
Government	12.0%
Self-employed	2.3%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	84.2%
Carpool	2.4%
Public transit	2.2%
Walk	1.1%
Work from home	9.7%
Other means	0.6%
Avg commute (minutes)	33.5

Poverty

All people 2.2%

Under 18 years 1.5%

18 and over 2.3%

Married-couple families 0.3%

Female-led households 2.3%

Income support

Source	% of households
Social Security	33.8%
Retirement income	28.0%
Supplemental Security	2.2%
Cash public assistance	1.3%
Food stamps / SNAP	0.5%

Health indicators

Condition	%
Obesity	34.4%
High blood pressure	29.8%
High cholesterol	30.5%
Diabetes	9.6%
Heart disease	5.7%
Stroke	2.4%
Asthma	9.1%
Arthritis	25.7%
Kidney disease	2.4%
Pulmonary disease	6.2%
Cancer	6.6%

Behavior / access	%
Smoking	16.7%
Binge drinking	18.2%
No physical activity	21.6%
Less than 7 hrs sleep	31.9%
Depression	19.8%
Fair or poor health	12.1%
Poor mental health	13.5%
Poor physical health	9.3%
No health insurance	11.0%
Visited doctor (checkup)	74.8%
Visited dentist	69.5%
Cholesterol screening	91.6%
Teeth loss	10.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	807	5.8%

Disability	%
Any disability	11.6%
Under 18	3.4%
18–64 years	6.9%
65 and over	35.9%

Health insurance coverage

Type	%
Private insurance	87.4%
Public insurance	24.7%
No insurance	2.4%
Uninsured under 19	2.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	16,954	95.6%
Spanish	308	1.8%
Other Indo-European	139	0.8%
Asian & Pacific Islander	131	0.8%
Other languages	38	0.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	16,612	93.6%
Born in same state	16,570	93.4%
Born in different state	8,442	47.6%
Foreign born	42	0.2%
Naturalized citizen	1,129	6.4%
Not a US citizen	954	84.5%

Ancestry

Ancestry	Count	%
Italian	2,152	12.1%
French	1,318	7.4%
English	1,303	7.3%
Arab	509	2.9%

Ancestry	Count	%
Irish	248	1.4%
Polish	186	1%
Norwegian	67	0.4%
Dutch	12	0.1%

Technology access

Metric	% of households
Computer access	36.5%
Internet access	96.6%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 46373

What city is ZIP code 46373 in?

ZIP code 46373 is primarily assigned to Saint John, Indiana.

What county is ZIP code 46373 in?

ZIP code 46373 falls within Lake County, Indiana.

Is ZIP code 46373 mostly owner-occupied?

97% of occupied units in ZIP code 46373 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 46373?

The median home value in ZIP code 46373 is $351,700.

What is the median household income in ZIP code 46373?

The median household income in ZIP code 46373 is $117,632, above the national median of ~$75,000.

What is the population of ZIP code 46373?

ZIP code 46373 has an estimated population of 17,741 residents, with a density of 1,630 people per square mile.

What timezone is ZIP code 46373 in?

ZIP code 46373 observes the CST timezone.