Seneca, Illinois

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Seneca, Illinois

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High Points

Seneca strengths, compared to Peers (similar size places nationally) or State (other places in Illinois):

Category Trophy
Walking and Biking to Work
(vs. Peers)
Top 11% Seneca Walking and Biking to Work
Median Family Income
(vs. Peers)
Top 13% Seneca Median Family Income
People in Middle Class or Better
(vs. Peers)
Top 15% Seneca People in Middle Class or Better

Comparative Profile of Seneca, Illinois

Comparing Seneca to similar size places nationwide (Peers) and to other places in Illinois (State):

Ratings range from 1 (lowest) to 10 (highest).

The People

Characteristic Compared
to Peers
to State
Well-Paid Single Men 8 6
Well-Paid Single Women 8 6
Male Share of the Population 7 7
Children Under 5 Years Old 5 4
Female Share of the Population 4 4
Age of the Population 4 4
Senior Citizens 3 3
Racial Diversity 2 2


Characteristic Compared
to Peers
to State
Portion of People Married 9 9
Average Household Size 9 9


Characteristic Compared
to Peers
to State
Median Family Income 9 8
People in Middle Class or Better 9 7
People Above Poverty 8 6
College Educated Adults 5 5

Commute & Sprawl

Characteristic Compared
to Peers
to State
Walking and Biking to Work 9 10
Working at Home 6 7
Short Commute Times 3 5
Public Transportation Use 1 1


Characteristic Compared
to Peers
to State
Housing Recently Built 5 6
Studio & One-Bedroom Rentals 4 4
Affordability of Rents 4 5
Affordability of Property Taxes 2 5
People Living Alone 2 2
Seasonal and Vacation Housing 1 1

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Seneca Almanac

Category Value
Nearest Medium City 31 miles SW of Joliet, Illinois (center to center)
Nearest Large City 62 miles SW of Chicago, Illinois
County La Salle
Standard Zip Codes 61360
Phone Area Codes 815
Time Zone Central (-6 hours from GMT)
Daylight Savings The city observes Daylight Saving Time.
Latitude 41.311
Longitude -88.609

Seneca Climate

Nearest Weather Stations

  • Temp ranges are avg daily min and max for the month
  • Precipitation is rainfall (and rainfall equiv of snowfall)
Distance 9.5 miles
Jan Temp 13 to 30 F
Apr Temp 39 to 61 F
Jul Temp 63 to 85 F
Oct Temp 41 to 64 F
Annual Precip 35.7 inches
Station DWIGHT
Distance 18.7 miles
Jan Temp 12 to 29 F
Apr Temp 38 to 60 F
Jul Temp 63 to 84 F
Oct Temp 40 to 64 F
Annual Precip 34.4 inches
Distance 29.5 miles
Jan Temp 14 to 30 F
Apr Temp 37 to 60 F
Jul Temp 63 to 85 F
Oct Temp 41 to 64 F
Annual Precip 36.9 inches
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Seneca Population (2000)

Category Count Percent
Total Population 2,053 100%
Male 1,004 48.9%
Female 1,049 51.1%
Under 18 631 30.7%
18+ 1,422 69.3%
65+ 243 11.8%
Median Age 35.7
Average Family Size 3.22
White 2,024 98.6%
African-American 0 0%
Asian 1 0%
American Indian & Alaskan 1 0%
Other 18 0.9%
Mixed Race 9 0.4%
Hispanic (included in categories above) 30 1.5%

Estimated Seneca Population Growth 2000-2005

Category Value
Est. 2005 Population 2,057
Growth 4
Growth % 0.2%

Seneca Ancestry

(From 2000 Census, as reported by individuals)

Note: This is national, not racial, ancestry, so, e.g., the Census doesn't have categories for Hispanic and African-American people. CityTownInfo is currently gathering additional ancestry data for this site.
Ancestry Percent
German 23%
Irish 15.6%
English 11.8%
Norwegian 10.3%
US/American 7.5%
Italian 6.8%
Other (often includes Hispanic and African American) 4.9%
Polish 4.1%
French (except Basque) 2.9%
Swedish 2.9%
Scotch-Irish 1.5%
European 1.4%
Dutch 1.1%
Lithuanian 0.8%
Czech 0.6%
Scottish 0.5%
Croatian 0.5%
Russian 0.5%
Albanian 0.4%
Danish 0.4%
Scandinavian 0.3%
Slovene 0.3%
British 0.3%
Northern European 0.3%
Czechoslovakian 0.2%
Slovak 0.2%
French Canadian 0.2%
Greek 0.2%
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Neighborhood and Nearby Area Names

According to the US Postal Service, Seneca, its neighborhoods, and/or surrounding areas are also referred to as:

Stavanger (61360)

Note that not all alternate names are acceptable for use in US Post Office addresses.

Nearby Cities and Towns

Location Pop. Median Family
Income (2000)
Seneca 2,053 $57,552
Kinsman 109 $47,083
Marseilles 4,655 $45,909
Morris 11,928 $54,987
Ottawa 18,307 $44,435
Ransom 409 $55,682
Verona 257 $53,571

Seneca Public Libraries

Seneca P.l.d.
Seneca, Illinois
(815) 357-6566

library logo

More Information for Librarians

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Featured Colleges in the Seneca Area (QuickSchools™)

quickinfoThese schools offer particularly quick info upon request, and we have written detailed profiles for each (click school names to see the profiles).

Request info from multiple schools, by clicking the Request Info links.

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Penn Foster College

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  • Programs: Veterinary Technician (Associate)
  • Degrees: Associate

Ohio University has offered distance learning educational opportunities for more than 100 years.

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  • Degrees: Master

Kaplan University is focused on recognizing the achievements of military and veteran students and offers the flexibility of an online education.

  • Programs: MSHUS- Organizational and Social Services, MS in Psychology - Addictions, AAS in Business Administration - Small Business Management, more...
  • Degrees: Master, Associate, Bachelor

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  • Degrees: Master, Bachelor

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  • Programs: A.S. - Health Sciences - Medical Administrative Assistant, Diploma - Medical Office Billing Specialist, Diploma - Healthcare Technology and Systems, more...
  • Degrees: Associate, Diploma
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Seneca High Schools (2004)

(Sorted by Number of Students)

Title I eligible, not participating.
Serves 490 students.
Student/teacher ratio: 12.3

A Special Education School
Serves 33 students.
Student/teacher ratio: 5.5

Seneca Colleges

(List of Illinois Colleges)

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