61340 ZIP Code — Mark, IL

Putnam County, Illinois

ZIP code 61340 is located in Mark, Illinois, within Putnam County. It covers approximately 0.87 square miles and serves a population of 480 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 815/779.

About ZIP code 61340

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $150,500. Owner-occupancy is high at 76%, well above the national average.

Median household income is $80,357. The poverty rate of 5% is below the national average.

The dominant occupation class is management, business, and professional, with manufacturing as the leading industry. The average commute of 22 minutes is near the national average.

Educational attainment is near the national average, with 22% of residents holding a bachelor's degree or higher.

480

population

0.87

sq mi land

Standard

ZIP type

Central (CT)

timezone

61340 ZIP code map

Cities in ZIP code 61340

Below are the cities the US Postal Service accepts for ZIP code 61340. Using any city not on this list may result in mail delivery delays.

City	Status
Mark	Acceptable

Demographics updated 05/2026

Population
Total population	480
Population density	552 / sq mi
State FIPS	17
County FIPS	155

Geography
Land area	0.87 sq mi
Water area	0.00 sq mi
Latitude	41.2659
Longitude	-89.2528
Timezone	Central (CT)
Area code	815/779

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	28.9%	37.7%	37.2%
$50k – $100k	35.2%	36.9%	29.6%
$100k – $200k	33.3%	23.0%	24.4%
Over $200k	2.5%	2.4%	8.8%

Demographics & statistics

480

Population

552

People per sq mi

44.4

Median age

$80,357

Median household income

$39,533

Per capita income

$150,500

Median home value

$814

Median monthly rent

75.7%

Home ownership

5.4%

Poverty rate

1.1%

Unemployment

192

Housing units

22.1%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	115	24.0%
18 and over	365	76.0%
65 and over	95	19.8%
Median age	44.4 years

Race & ethnicity

White 100%

Group	Count	%
White	480	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	28.9%	37.7%	37.2%
$50k – $100k	35.2%	36.9%	29.6%
$100k – $200k	33.3%	23.0%	24.4%
Over $200k	2.5%	2.4%	8.8%

Under $10k 4.9%

$10k–$15k 3.1%

$15k–$25k 1.3%

$25k–$35k 4.9%

$35k–$50k 15.0%

$50k–$75k 14.6%

$75k–$100k 19.0%

$100k–$150k 19.9%

$150k–$200k 12.8%

$200k+ 4.4%

Range	% of households
Under $10k	4.9%
$10k–$15k	3.1%
$15k–$25k	1.3%
$25k–$35k	4.9%
$35k–$50k	15.0%
$50k–$75k	14.6%
$75k–$100k	19.0%
$100k–$150k	19.9%
$150k–$200k	12.8%
$200k+	4.4%
Median income	$80,357

Housing

Home values

Under $50k 4.7%

$50k–$100k 12.9%

$100k–$150k 32.2%

$150k–$200k 18.7%

$200k–$300k 25.1%

$300k–$500k 6.4%

Housing overview

Metric	Value
Median home value	$150,500
Median rent / month	$814
Owner occupied	75.7%
Renter occupied	24.3%
Vacant	8.5%
Single-family detached	94.3%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	5.6
Avg household size (owned)	2.32

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	20.2%
1990–1999	14.6%
1980–1989	9.7%
1970–1979	7.3%
1960–1969	7.3%
1950–1959	3.6%
1940–1949	8.5%
1939 or earlier	28.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	7.3%
2 bedrooms	35.6%
3 bedrooms	35.2%
4 bedrooms	21.9%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.9%
1 vehicle	25.2%
2 vehicles	46.5%
3 or more	27.4%

Heating fuel

Fuel type	%
Utility gas	89.8%
Electricity	10.2%

Households & families

Household type	Count	%
Married-couple family	128	56.6%
Cohabiting couple	0	0.0%
Male householder, no spouse	60	26.5%
Female householder, no spouse	38	16.8%
Households with children under 18	81	35.8%
Households with seniors (65+)	64	28.3%
Average household size	2.12

Marital status

Status	Male	Female
Never married	36.4%	4.9%
Married	51.8%	73.5%
Separated	0.0%	1.2%
Widowed	0.0%	1.2%
Divorced	11.8%	19.1%

Education

Less than 9th grade 0.0%

Some HS, no diploma 3.1%

HS graduate 36.8%

Some college, no degree 21.2%

Associate's degree 16.7%

Bachelor's degree 18.1%

Graduate / professional 4.0%

Metric	%
HS diploma or higher	96.9%
Bachelor's or higher	22.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	9	7.8%
Kindergarten	0	0.0%
Elementary school	65	56.0%
High school	31	26.7%
College / grad school	11	9.5%

Employment

Industry of employment

Manufacturing 23.6%

Education & healthcare 15.1%

Transportation & utilities 13.9%

Retail trade 13.1%

Arts, food & hospitality 10.8%

Public administration 8.1%

Finance & real estate 5.8%

Other services 3.5%

Agriculture & mining 2.3%

Wholesale trade 1.5%

Construction 1.2%

Professional & management 1.2%

Occupation

Category	%
Management, business & arts	30.9%
Service	15.1%
Sales & office	23.6%
Natural resources & construction	8.1%
Production & transportation	22.4%

Employment type

Type	%
Private sector	78.4%
Government	20.8%
Self-employed	0.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	89.9%
Carpool	3.4%
Public transit	0.0%
Walk	0.0%
Work from home	6.7%
Other means	0.0%
Avg commute (minutes)	22.2

Poverty

All people 5.4%

Under 18 years 2.6%

18 and over 6.3%

Married-couple families 3.9%

Female-led households 0.0%

Income support

Source	% of households
Social Security	28.3%
Retirement income	19.9%
Supplemental Security	1.8%
Cash public assistance	1.3%
Food stamps / SNAP	2.2%

Health indicators

Condition	%
Obesity	34.1%
High blood pressure	32.0%
High cholesterol	32.5%
Diabetes	9.4%
Heart disease	6.5%
Stroke	3.0%
Asthma	9.8%
Arthritis	26.4%
Kidney disease	2.8%
Pulmonary disease	7.1%
Cancer	6.9%

Behavior / access	%
Smoking	18.4%
Binge drinking	15.8%
No physical activity	24.8%
Less than 7 hrs sleep	32.4%
Depression	18.4%
Fair or poor health	13.8%
Poor mental health	13.5%
Poor physical health	9.8%
No health insurance	10.9%
Visited doctor (checkup)	76.3%
Visited dentist	64.9%
Cholesterol screening	89.2%
Teeth loss	14.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	26	7.1%

Disability	%
Any disability	14.4%
Under 18	0.0%
18–64 years	3.3%
65 and over	63.2%

Health insurance coverage

Type	%
Private insurance	85.8%
Public insurance	21.5%
No insurance	1.7%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	455	94.8%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	471	98.1%
Born in same state	470	97.9%
Born in different state	437	91.0%
Foreign born	1	0.2%
Naturalized citizen	9	1.9%
Not a US citizen	2	22.2%

Ancestry

Ancestry	Count	%
Italian	32	6.7%
French	32	6.7%

Ancestry	Count	%
Arab	15	3.1%
Norwegian	11	2.3%

Technology access

Metric	% of households
Computer access	47.1%
Internet access	92.9%

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

Frequently asked questions about ZIP code 61340

What city is ZIP code 61340 in?

ZIP code 61340 is primarily assigned to Mark, Illinois.

What county is ZIP code 61340 in?

ZIP code 61340 falls within Putnam County, Illinois.

What is the typical home value in ZIP code 61340?

The median home value in ZIP code 61340 is $150,500.

What is the population of ZIP code 61340?

ZIP code 61340 has an estimated population of 480 residents, with a density of 550 people per square mile.

What is the median household income in ZIP code 61340?

The median household income in ZIP code 61340 is $80,357, above the national median of ~$75,000.

What timezone is ZIP code 61340 in?

ZIP code 61340 observes the CST timezone.