Seneca, Illinois Population 2022

2,254
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Seneca is a city located in Illinois. Seneca has a 2020 population of 2,254. Seneca is currently growing at a rate of 0.04% annually but its population has decreased by -4.37% since the most recent census, which recorded a population of 2,357 in 2010.

The average household income in Seneca is $85,150 with a poverty rate of 11.07%. The median rental costs in recent years comes to $741 per month, and the median house value is $161,000. The median age in Seneca is 32.6 years, 35.5 years for males, and 30.7 years for females.

Seneca Demographics

According to the most recent ACS, the racial composition of Senecawas:

  • White: 98.36%
  • Two or more races: 1.31%
  • Black or African American: 0.33%
  • Native American: 0.00%
  • Asian: 0.00%
  • Native Hawaiian or Pacific Islander: 0.00%
  • Other race: 0.00%
The current population of Seneca, Illinois is 2,254 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 2,254.The last official US Census in 2010 recorded the population at 2,357.

Seneca, Illinois Population 2022

Population by Race

Race Population Percentage
White2,40298.36%
Two or More Races321.31%
Black or African American80.33%
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Seneca Population by Race

Seneca Population Pyramid $2022

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Seneca Median Age

32.6


Total

35.5


Male

30.7


Female

Seneca Adults

There are 1,759 adults, (313 of whom are seniors) in Seneca.

Seneca Age Dependency

Age Dependency Ratio

21.6

Old Age Dependency Ratio

47.2

Child Dependency Ratio

Seneca Sex Ratio

Female

1,249

51.15%

Male

1,193

48.85%

Seneca Population by Age

Seneca Renter vs Owner Occupied by Household Type

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Seneca Household Types

Type Owner Renter
Female49.2%50.8%
All83.8%16.2%
Male86.5%13.5%
Non Family88%12%
Married90.9%9.1%

83.8%

Rate of Home Ownership

Seneca Households and Families

Type Count Average Size Owned
All8842.7683.8
Married4953.1190.9
Non Family1501.2688
Female1282.6349.2
Male1113.4286.5

2.99

Average Family Size

2.76

Average Household Size

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Seneca Households by Type

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Education Attained Count Percentage
Less Than 9th Grade90.59%
9th to 12th Grade1006.57%
High School Graduate49432.44%
Some College45529.88%
Associates Degree19612.87%
Bachelors Degree1258.21%
Graduate Degree1449.46%
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Seneca Educational Attainment by Sex (over 25)

Seneca Educational Attainment by Race

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Race Total High School Bachelors
White1,4491,347267
Hispanic4033
2+ Races26262
Black88

The highest rate of high school graduation is among black people with a rate of 100.00%.

The highest rate of bachelors degrees is among white people with a rate of 18.43%.

Seneca Educational Attainment by Race

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Name Average Male Female
Overall$40,793$61,750$26,161
Less Than 9th Grade$$57,500$20,250
High School Graduate$37,917$41,071$31,528
Some College$36,667$92,880$17,798
Bachelors Degree$53,864$94,167$
Graduate Degree$58,750$117,917$57,813

$40,793

Average Earnings

$61,750

Average Male

$26,161

Average Female

Seneca Earnings by Educational Attainment

Seneca Language by Age

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Seneca Language

98.83% of Seneca residents speak only English, while 1.17% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 0.68% of the population.

Seneca Language

Seneca Poverty by Race

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Name Total In Poverty Poverty Rate
White2,2902229.69%
Hispanic1083734.26%
Multiple321134.38%
OtherNaN%

11.07%

Overall Poverty Rate

10.26%

Male Poverty Rate

11.85%

Female Poverty Rate

Poverty in Seneca

The race most likely to be in poverty in Seneca is White, with 9.69% below the poverty level.

The race least likely to be in poverty in Seneca is Hispanic, with 34.26% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 5.91%. Among those working part-time, it was 14.29%, and for those that did not work, the poverty rate was 9.77%.

Seneca Poverty

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Name Poverty
Less Than 9th Grade18.35%
High School12.35%
Bachelors or Greater5.20%
Some College3.84%

Seneca Poverty Rate by Education

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Rate Poverty
Female Unemployed24.44%
Female Employed11.06%
Male Unemployed10.53%
Male Employed7.77%

Seneca Poverty Rate by Employment Status and Sex

Seneca Income by Household Type

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Name Median Mean
Households$72,273$85,150
Families$82,115$92,609
Married Families$98,750-
Non Families$32,000$44,653
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Income by Household Type

Seneca Marital Status

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Marriage Rates

52.1%

Overall Marriage Rate

52.0%

Male Marriage Rate

52.3%

Female Marriage Rate

Seneca Married by Age and Sex

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Seneca Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 55-64.

Seneca Marital Status by Race

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Seneca Marital Status

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145

Number of Veterans

Male Veterans

Female Veterans

War Veterans
Vietnam42
First Gulf War14
Korea7
Second Gulf War7
World War II4

Seneca Veterans by War

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Age Group Veterans
75+38
65 to 7437
55 to 6433
35 to 5433
18 to 344

Seneca Veterans by Age

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Seneca Veterans by Race

Seneca Veterans by Education

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5.52%

Veteran Poverty Rate

20.69%

Veteran Disability Rate

Seneca Veterans by Education

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69.2%

Labor Force Participation

63%

Employment Rate

9.1%

Unemployment Rate

Seneca Employment by Age

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Seneca Employment by Race

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Seneca Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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89.03%

Born in Seneca

99.88%

Native Born

0.12%

Foreign Born

0.00%

Non Citizen

0.12%

Naturalized

Place of Birth

99.88% of Seneca residents were born in the United States, with 89.03% having been born in Illinois. 0.00% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Seneca Place of Birth

Note: 2021 and 2022 data is projected
Year Population Growth Annual Growth Rate
20222,25410.04%
20212,25310.04%
20202,25210.04%
20192,25110.04%
20182,250-7-0.31%
20172,257-12-0.53%
20162,269-11-0.48%
20152,280-14-0.61%
20142,294-13-0.56%
20132,307-22-0.94%
20122,329-18-0.77%
20112,347-10-0.42%
20102,3570.00%

Seneca Population by Year