Seneca ZIP Codes — La Salle County, IL

There is one unique ZIP code in Seneca, Illinois and it is 61360. Area code: 815.

ZIP codes

47.40

sq mi land

0.37

sq mi water

815

area code

Seneca, IL ZIP code map

About Seneca, IL

Seneca is a charming village located in Seneca Township within La Salle County, Illinois. This small community is known for its friendly atmosphere and rural surroundings, which make it an appealing destination for residents and visitors alike. With a rich agricultural history and a laid-back lifestyle, Seneca offers a unique blend of local culture and scenic landscapes.

Location & geography

Seneca is situated in the northeastern part of La Salle County, making it a convenient spot for travelers in the region. It is approximately 15 miles southwest of Joliet, which adds to its accessibility, and around 25 miles northeast of the historic town of Ottawa. The village encompasses a land area of 47.40 square miles, with a small water area of 0.37 square miles that contributes to the local ecosystem.

Community & economy

The character of Seneca is deeply rooted in its agricultural heritage, with many residents involved in farming and related industries. Daily life in Seneca is characterized by community events and a strong connection among neighbors, which fosters a welcoming environment. The village promotes local traditions while also embracing modern conveniences, making it ideal for families and individuals seeking a peaceful setting.

Transportation

Seneca is easily accessible via major roadways, including Interstate 80, which connects the village to larger urban centers in Illinois. The nearest major airport is the Chicago Midway International Airport, located about 50 miles to the northeast, providing convenient travel options. Local transport options are available, but residents often rely on personal vehicles for commuting and travel.

History

Seneca was founded in the mid-19th century and has since developed a reputation for agriculture and small-town living. The area has historically supported farming and related industries that continue to play a significant role in the local economy. Notable events in Seneca's history include its establishment as a train stop on the Chicago and North Western Railway, which helped spur early growth.

Did you know?

One surprising fact about Seneca is that it is home to several vibrant community events throughout the year, which foster friendships and goodwill among residents. Additionally, the village's proximity to the Illinois River provides residents and visitors with numerous recreational opportunities, including fishing and boating.

ZIP codes for Seneca, IL (1)

ZIP code	City	County	Map
61360	Seneca	La Salle	View map

Demographics & statistics

3,379

Population

43.2

Median age

$91,822

Median household income

$41,891

Per capita income

$225,900

Median home value

$1,028

Median monthly rent

79.1%

Home ownership

15.7%

Poverty rate

4.9%

Unemployment

1,075

Housing units

14.6%

Bachelor's or higher

Age distribution

Male Female

106

Under 5

101

138

5–9

130

105

10–14

104

15–19

20–24

240

25–34

226

124

35–44

117

212

45–54

200

206

55–59

194

160

60–64

152

222

65–74

209

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	798	23.6%
18 and over	2,581	76.4%
65 and over	542	16.0%
Median age	43.2 years

Race & ethnicity

White 88.7%

Two or more races 5%

Hispanic or Latino 4.3%

Other race 1.2%

Black or African American 0.7%

Group	Count	%
White	3,131	88.7%
Two or more races	178	5%
Hispanic or Latino	150	4.3%
Other race	44	1.2%
Black or African American	26	0.7%

Household income

Under $10k 0.9%

$10k–$15k 4.4%

$15k–$25k 3.0%

$25k–$35k 3.9%

$35k–$50k 8.6%

$50k–$75k 18.8%

$75k–$100k 16.8%

$100k–$150k 18.6%

$150k–$200k 11.0%

$200k+ 14.0%

Range	% of households
Under $10k	0.9%
$10k–$15k	4.4%
$15k–$25k	3.0%
$25k–$35k	3.9%
$35k–$50k	8.6%
$50k–$75k	18.8%
$75k–$100k	16.8%
$100k–$150k	18.6%
$150k–$200k	11.0%
$200k+	14.0%
Median income	$91,822

Housing

Home values

Under $50k 7.1%

$50k–$100k 4.7%

$100k–$150k 12.3%

$150k–$200k 17.6%

$200k–$300k 27.7%

$300k–$500k 28.1%

$500k–$1M 2.5%

Housing overview

Metric	Value
Median home value	$225,900
Median rent / month	$1,028
Owner occupied	79.1%
Renter occupied	20.9%
Vacant	4.1%
Single-family detached	84.6%
Large apartment buildings	0.0%
Mobile homes	6.9%
Median rooms	6.0
Avg household size (owned)	2.60

Year built

Era	%
2020 or later	0.0%
2010–2019	2.5%
2000–2009	19.6%
1990–1999	15.8%
1980–1989	10.5%
1970–1979	9.0%
1960–1969	9.8%
1950–1959	8.6%
1940–1949	5.1%
1939 or earlier	19.3%

Bedrooms

Size	% of units
No bedroom (studio)	0.2%
1 bedroom	5.4%
2 bedrooms	20.1%
3 bedrooms	43.6%
4 bedrooms	23.3%
5+ bedrooms	7.3%

Vehicles per household

Vehicles	% of households
No vehicle	0.9%
1 vehicle	22.5%
2 vehicles	44.5%
3 or more	32.1%

Heating fuel

Fuel type	%
Utility gas	68.5%
Electricity	11.3%
Propane / LP gas	19.7%
Wood	0.5%

Households & families

Household type	Count	%
Married-couple family	762	59.1%
Cohabiting couple	123	9.5%
Male householder, no spouse	197	15.3%
Female householder, no spouse	208	16.1%
Households with children under 18	373	28.9%
Households with seniors (65+)	353	27.4%
Average household size	2.62

Marital status

Status	Male	Female
Never married	29.7%	19.3%
Married	55.2%	59.5%
Separated	5.2%	1.6%
Widowed	0.1%	5.7%
Divorced	9.7%	13.9%

Education

Less than 9th grade 0.1%

Some HS, no diploma 4.7%

HS graduate 40.5%

Some college, no degree 24.9%

Associate's degree 15.2%

Bachelor's degree 12.1%

Graduate / professional 2.4%

Metric	%
HS diploma or higher	95.2%
Bachelor's or higher	14.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	35	4.9%
Kindergarten	66	9.2%
Elementary school	352	49.0%
High school	161	22.4%
College / grad school	105	14.6%

Employment

Industry of employment

Education & healthcare 20.0%

Transportation & utilities 16.7%

Manufacturing 14.0%

Retail trade 10.7%

Construction 9.7%

Public administration 8.4%

Other services 5.9%

Arts, food & hospitality 5.2%

Professional & management 4.7%

Finance & real estate 3.5%

Wholesale trade 0.6%

Agriculture & mining 0.3%

Information 0.2%

Occupation

Category	%
Management, business & arts	23.7%
Service	22.7%
Sales & office	15.2%
Natural resources & construction	16.8%
Production & transportation	21.5%

Employment type

Type	%
Private sector	85.1%
Government	13.0%
Self-employed	1.9%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	84.2%
Carpool	7.7%
Public transit	0.0%
Walk	2.9%
Other means	0.0%
Avg commute (minutes)	25.6

Poverty

All people 15.7%

Under 18 years 30.2%

18 and over 11.2%

Married-couple families 6.8%

Female-led households 35.3%

Income support

Source	% of households
Social Security	35.5%
Retirement income	36.0%
Supplemental Security	8.0%
Cash public assistance	2.2%
Food stamps / SNAP	12.2%

Health indicators

Condition	%
High blood pressure	31.6%
High cholesterol	32.4%
Heart disease	6.2%
Stroke	2.9%
Asthma	9.8%
Arthritis	25.5%
Kidney disease	2.7%
Pulmonary disease	7.2%
Cancer	6.5%

Behavior / access	%
Binge drinking	16.3%
No physical activity	23.9%
Less than 7 hrs sleep	33.4%
Fair or poor health	13.8%
Poor mental health	13.3%
Poor physical health	10.0%
No health insurance	10.9%
Visited doctor (checkup)	75.2%
Visited dentist	64.7%
Cholesterol screening	88.8%
Teeth loss	13.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	238	9.2%

Disability	%
Any disability	13.1%
Under 18	1.3%
18–64 years	11.3%
65 and over	37.5%

Health insurance coverage

Type	%
Private insurance	72.3%
Public insurance	39.2%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,172	93.9%
Spanish	32	1.0%
Other Indo-European	17	0.5%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	3,338	98.8%
Born in same state	3,332	98.6%
Born in different state	2,805	83.0%
Foreign born	6	0.2%
Naturalized citizen	41	1.2%
Not a US citizen	41	100.0%

Ancestry

Ancestry	Count	%
Italian	819	24.2%
French	295	8.7%
Polish	225	6.7%
Arab	154	4.6%

Ancestry	Count	%
English	66	2%
German	10	0.3%
Norwegian	3	0.1%

Technology access

Metric	% of households
Computer access	38.2%
Internet access	96.4%

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

Frequently asked questions

What ZIP codes does Seneca, IL have?

Seneca, IL has one ZIP code: 61360. Each ZIP code serves a distinct delivery area within the city and surrounding region.