Saint John ZIP Codes — Lake County, IN

There is one unique ZIP code in Saint John, Indiana and it is 46373. Area code: 219.

ZIP codes

10.88

sq mi land

0.09

sq mi water

219

area code

Saint John, IN ZIP code map

About Saint John, IN

Saint John, Indiana, is a charming town located in Lake County. This town is known for its family-friendly atmosphere and strong sense of community. With close proximity to major urban centers, it offers a unique blend of suburban living and easy access to city life.

Location & geography

Saint John is situated in the northwest corner of Indiana, approximately 30 miles southeast of downtown Chicago. Nearby cities include Crown Point, which is about 10 miles to the south, and Dyer, located approximately 6 miles to the east. The town covers a total land area of 10.88 square miles, with a small water area of 0.09 square miles.

Community & economy

The character of Saint John is shaped by its welcoming residents who take pride in the community's development and safety. The town features a mix of residential neighborhoods, local businesses, and recreational facilities that cater to families and individuals alike. Daily life in Saint John is characterized by community events, parks, and a focus on maintaining a high quality of life.

Transportation

Saint John is conveniently accessible via major highways, including Interstate 65 and U.S. Route 41, making it easy for residents to travel to nearby cities and attractions. The nearest major airport is Gary/Chicago International Airport, located about 20 miles to the northwest. Public transit options are limited, emphasizing the community's reliance on personal vehicles.

History

Saint John was founded in the early 20th century, primarily as a residential community. The town developed alongside agriculture and manufacturing industries, which contributed to its initial growth. Notable events include the establishment of local parks and the promotion of community-driven initiatives.

Did you know?

One surprising fact about Saint John is that it was named after the local St. John the Baptist church, reflecting the town's early roots in community and faith. Additionally, despite its small size, the town is known for its vibrant cultural festivals and events that draw residents from surrounding areas.

ZIP codes for Saint John, IN (1)

ZIP code	City	County	Map
46373	Saint John	Lake	View map

Demographics & statistics

17,741

Population

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

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%
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	%
High blood pressure	29.8%
High cholesterol	30.5%
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	%
Binge drinking	18.2%
No physical activity	21.6%
Less than 7 hrs sleep	31.9%
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%
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

What ZIP codes does Saint John, IN have?

Saint John, IN has one ZIP code: 46373. Each ZIP code serves a distinct delivery area within the city and surrounding region.