Knox ZIP Codes — Starke County, IN

There is one unique ZIP code in Knox, Indiana and it is 46534. Area code: 574.

ZIP codes

119.88

sq mi land

2.31

sq mi water

574

area code

Knox, IN ZIP code map

About Knox, IN

Knox is a charming city located in the heart of Indiana, known for its friendly community and scenic landscapes. As the county seat of Starke County, it plays a significant role in the local economy and governance. With a rich history and a variety of cultural events, Knox offers a small-town atmosphere with access to larger metropolitan areas.

Location & geography

Geographically, Knox is situated in northwestern Indiana, approximately 30 miles from both South Bend and Valparaiso. The city spans a land area of 119.88 square miles, complemented by a water area of 2.31 square miles, enhancing its appeal to outdoor enthusiasts. The terrain around Knox features a mix of farmland and forested areas, creating a picturesque environment for residents and visitors alike.

Community & economy

The community of Knox is characterized by its tight-knit atmosphere and commitment to local activities, evident in its various festivals and community gatherings. While often seen as a primarily agricultural area, Knox is also home to a diverse range of industries, including manufacturing and small businesses that cater to the local population. Daily life in Knox reflects the values of a rural Indiana community, marked by local shops, parks, and friendly neighborhoods.

Transportation

Transportation in Knox is facilitated by U.S. Route 35, which runs through the city and connects it to larger highways and neighboring towns. The city is serviced by area code 574, which covers a significant region of northern Indiana. For air travel, the nearest major airport is South Bend International Airport, located around 40 miles from Knox.

History

Knox was founded in the early 19th century and quickly became the administrative center of Starke County. Historically, the city has been known for its agricultural roots, but it has developed a more diverse economy over the years. Significant events in Knox's history include the establishment of the annual Knox Pumpkin Festival, which celebrates the area's agricultural heritage and attracts visitors from all over.

Did you know?

One surprising fact about Knox is that it once had a thriving potato processing industry, which played a crucial role in the local economy. Additionally, Knox is known for its annual fairs and festivals, which highlight the community's vibrant culture and commitment to tradition.

ZIP codes for Knox, IN (1)

ZIP code	City	County	Map
46534	Knox	Starke	View map

Demographics & statistics

11,011

Population

40.9

Median age

$58,100

Median household income

$26,247

Per capita income

$153,300

Median home value

$614

Median monthly rent

79.9%

Home ownership

15.3%

Poverty rate

4.2%

Unemployment

4,537

Housing units

12.5%

Bachelor's or higher

Age distribution

Male Female

264

Under 5

277

357

5–9

373

400

10–14

419

300

15–19

314

362

20–24

378

601

25–34

629

653

35–44

684

704

45–54

737

410

55–59

429

360

60–64

377

642

65–74

671

237

75–84

248

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	2,495	22.7%
18 and over	8,516	77.3%
65 and over	1,983	18.0%
Median age	40.9 years

Race & ethnicity

White 94.3%

Two or more races 2.6%

Hispanic or Latino 1.2%

American Indian / Alaska Native 0.8%

Other race 0.7%

Black or African American 0.3%

Asian 0.1%

Group	Count	%
White	10,511	94.3%
Two or more races	286	2.6%
Hispanic or Latino	132	1.2%
American Indian / Alaska Native	94	0.8%
Other race	73	0.7%
Black or African American	34	0.3%
Asian	13	0.1%

Household income

Under $10k 6.4%

$10k–$15k 7.4%

$15k–$25k 8.4%

$25k–$35k 8.6%

$35k–$50k 13.0%

$50k–$75k 18.1%

$75k–$100k 16.4%

$100k–$150k 13.3%

$150k–$200k 6.6%

$200k+ 1.8%

Range	% of households
Under $10k	6.4%
$10k–$15k	7.4%
$15k–$25k	8.4%
$25k–$35k	8.6%
$35k–$50k	13.0%
$50k–$75k	18.1%
$75k–$100k	16.4%
$100k–$150k	13.3%
$150k–$200k	6.6%
$200k+	1.8%
Median income	$58,100

Housing

Home values

Under $50k 4.0%

$50k–$100k 19.8%

$100k–$150k 24.1%

$150k–$200k 22.3%

$200k–$300k 16.4%

$300k–$500k 8.8%

$500k–$1M 4.6%

Housing overview

Metric	Value
Median home value	$153,300
Median rent / month	$614
Owner occupied	79.9%
Renter occupied	20.1%
Vacant	22.5%
Single-family detached	83.7%
Large apartment buildings	2.2%
Mobile homes	6.6%
Median rooms	6.2
Avg household size (owned)	2.71

Year built

Era	%
2020 or later	0.4%
2010–2019	3.9%
2000–2009	10.9%
1990–1999	11.8%
1980–1989	8.5%
1970–1979	19.9%
1960–1969	10.3%
1950–1959	9.6%
1940–1949	7.6%
1939 or earlier	17.2%

Bedrooms

Size	% of units
No bedroom (studio)	0.1%
1 bedroom	5.7%
2 bedrooms	21.7%
3 bedrooms	55.0%
4 bedrooms	15.3%
5+ bedrooms	2.2%

Vehicles per household

Vehicles	% of households
No vehicle	5.9%
1 vehicle	26.8%
2 vehicles	33.1%
3 or more	34.3%

Heating fuel

Fuel type	%
Utility gas	73.1%
Electricity	7.8%
Propane / LP gas	16.8%
Wood	2.1%
No fuel used	0.2%

Households & families

Household type	Count	%
Married-couple family	2,091	50.2%
Cohabiting couple	448	10.8%
Male householder, no spouse	543	13.0%
Female householder, no spouse	1,083	26.0%
Households with children under 18	1,350	32.4%
Households with seniors (65+)	1,505	36.1%
Average household size	2.64

Marital status

Status	Male	Female
Never married	27.4%	21.6%
Married	53.2%	49.3%
Separated	0.8%	2.7%
Widowed	3.3%	11.1%
Divorced	15.4%	15.3%

Education

Less than 9th grade 8.0%

Some HS, no diploma 8.1%

HS graduate 46.0%

Some college, no degree 17.6%

Associate's degree 7.8%

Bachelor's degree 8.0%

Graduate / professional 4.6%

Metric	%
HS diploma or higher	83.9%
Bachelor's or higher	12.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	141	6.6%
Kindergarten	138	6.4%
Elementary school	1,088	50.8%
High school	560	26.2%
College / grad school	214	10.0%

Employment

Industry of employment

Manufacturing 25.9%

Education & healthcare 24.8%

Retail trade 9.8%

Arts, food & hospitality 8.0%

Construction 6.9%

Other services 5.1%

Professional & management 4.4%

Public administration 4.3%

Finance & real estate 3.8%

Transportation & utilities 3.7%

Information 2.4%

Wholesale trade 0.8%

Agriculture & mining 0.2%

Occupation

Category	%
Management, business & arts	28.6%
Service	15.2%
Sales & office	18.9%
Natural resources & construction	9.8%
Production & transportation	27.5%

Employment type

Type	%
Private sector	80.9%
Government	14.2%
Self-employed	4.0%
Unpaid family workers	0.9%

Commute

Method	%
Drive alone	80.8%
Carpool	14.6%
Public transit	0.0%
Walk	0.9%
Other means	1.5%
Avg commute (minutes)	27.3

Poverty

All people 15.3%

Under 18 years 17.3%

18 and over 14.7%

Married-couple families 4.6%

Female-led households 36.1%

Income support

Source	% of households
Social Security	44.3%
Retirement income	29.8%
Supplemental Security	8.2%
Cash public assistance	2.7%
Food stamps / SNAP	13.8%

Health indicators

Condition	%
High blood pressure	37.4%
High cholesterol	34.4%
Heart disease	8.1%
Stroke	3.8%
Asthma	10.7%
Arthritis	29.8%
Kidney disease	3.4%
Pulmonary disease	10.7%
Cancer	6.9%

Behavior / access	%
Binge drinking	15.8%
No physical activity	30.8%
Less than 7 hrs sleep	35.8%
Fair or poor health	20.1%
Poor mental health	17.2%
Poor physical health	13.8%
No health insurance	15.1%
Visited doctor (checkup)	73.8%
Visited dentist	54.5%
Cholesterol screening	87.2%
Teeth loss	20.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	566	6.6%

Disability	%
Any disability	16.7%
Under 18	4.4%
18–64 years	16.5%
65 and over	33.1%

Health insurance coverage

Type	%
Private insurance	62.5%
Public insurance	48.3%
Uninsured under 19	2.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	10,470	95.1%
Spanish	43	0.4%
Other Indo-European	13	0.1%
Asian & Pacific Islander	27	0.3%
Other languages	3	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	10,835	98.4%
Born in same state	10,835	98.4%
Born in different state	7,997	72.6%
Foreign born	0	0.0%
Naturalized citizen	176	1.6%
Not a US citizen	103	58.5%

Ancestry

Ancestry	Count	%
Italian	1,748	15.9%
Arab	871	7.9%
French	698	6.3%
English	173	1.6%
Dutch	155	1.4%

Ancestry	Count	%
Norwegian	83	0.8%
German	68	0.6%
Irish	61	0.6%
Polish	51	0.5%

Technology access

Metric	% of households
Computer access	37.8%
Internet access	88.1%

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

Frequently asked questions

What ZIP codes does Knox, IN have?

Knox, IN has one ZIP code: 46534. Each ZIP code serves a distinct delivery area within the city and surrounding region.