Seneca, Michigan Population 2024

1,112

Seneca is a city located in Hillsdale County and Lenawee County Michigan. Seneca has a 2024 population of 1,112. Seneca is currently declining at a rate of -0.63% annually and its population has decreased by -2.54% since the most recent census, which recorded a population of 1,141 in 2020.

The average household income in Seneca is $75,426 with a poverty rate of 5.6%. The median age in Seneca is 50.1 years: 47.8 years for males, and 52.6 years for females.

Seneca Demographics

According to the most recent ACS, the racial composition of Seneca was:

  • White: 95.42%
  • Two or more races: 4.4%
  • Black or African American: 0.18%
  • Native American: 0%
  • Asian: 0%
  • Native Hawaiian or Pacific Islander: 0%
  • Other race: 0%
Land Area (mi²)
40.1 sq mi
Density (mi²)
27.80/sq mi
Growth Since 2020
-2.54% (-29)
The current population of Seneca, Michigan is 1,112 based on our projections of the latest US Census estimates (released May 2024). The last official US Census in 2020 recorded the population at 1,141.

Population by Race

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Race
Population
Percentage (of total)
White1,06295.42%
Two or more races494.4%
Black or African American20.18%
Native American00%
Asian00%
Native Hawaiian or Pacific Islander00%
Other race00%

White

Two or more races

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Seneca Population by Race

Seneca Population Pyramid 2024

Seneca Median Age

50.1

Total

47.8

Male

52.6

Female

Seneca Adults

There are 922 adults, (314 of whom are seniors) in Seneca.

Seneca Age Dependency

83.1

Age Dependency Ratio

51.6

Old Age Dependency Ratio

31.4

Child Dependency Ratio

Seneca Sex Ratio

Female50445.28%
Male60954.72%

Seneca Population by Age

Seneca Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All4882.2888.911.1
Married2393.0694.65.4
Non Family1641.1184.815.2
Female602.4286.713.3
Male252.166832

2.78

Average Family Size

2.28

Average Household Size

88.9%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Seneca Households and Families

Male

Female

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Education Attained
Count
Percentage
9th to 12th Grade738.4%
Associates Degree8810.13%
Bachelors Degree414.72%
Graduate Degree434.95%
High School Graduate36241.66%
Less Than 9th Grade252.88%
Some College23727.27%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Seneca Educational Attainment by Sex (over 25)

Seneca Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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Race
Total
High School
Bachelors
White82674178
2+ Races27216
Hispanic26160

The highest rate of high school graduation is among white people with a rate of 89.71%.

The highest rate of bachelors degrees is among 2+ races people with a rate of 22.22%.

Seneca Educational Attainment by Race

All

Male

Female

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Name
Average
Male
Female
Bachelors Degree$26,250$46,250$0
Graduate Degree$0$0$41,750
High School Graduate$37,583$39,028$0
Less Than 9th Grade$31,591$44,063$30,455
Overall$39,238$46,667$30,795
Some College$42,750$55,938$40,227

$39,238

Average Earnings

$46,667

Average Male

$30,795

Average Female

Seneca Earnings by Educational Attainment

Seneca Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Seneca Language

96.65% of Seneca residents speak only English, while 3.35% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.45% of the population.

Seneca Language

Seneca Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White1,020605.88%
Hispanic4924.08%

5.6%

Overall Poverty Rate

5.58%

Male Poverty Rate

5.62%

Female Poverty Rate

Poverty in Seneca

The race most likely to be in poverty in Seneca is White, with 5.88% below the poverty level.

The race least likely to be in poverty in Seneca is Hispanic, with 4.08% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.66%. Among those working part-time, it was 7.47%, and for those that did not work, the poverty rate was 9.68%.

Seneca Poverty

rate

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Rate
Poverty
High School9.67%
Some College3.69%
Less Than 9th Grade2.04%
Bachelors or Greater0%

Seneca Poverty Rate by Education

rate

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Rate
Poverty
Male Unemployed41.67%
Male Employed3.93%
Female Employed0%
Female Unemployed0%

Seneca Poverty Rate by Employment Status and Sex

Seneca Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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Name
Median
Mean
Families$63,750$74,919
Households$59,000$75,426
Married Families$70,417$-999,999,999
Non Families$41,500$72,459

mean

median

Income by Household Type

Seneca Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

51.4%

Overall Marriage Rate

45.7%

Male Marriage Rate

58.5%

Female Marriage Rate

Seneca Married by Age and Sex

male

female

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 45-54.

Seneca Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Seneca Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

92

Number of Veterans

92

Male Veterans

0

Female Veterans

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War
Veterans
Vietnam12
Second Gulf War5
First Gulf War4
Korea0
World War II0

Seneca Veterans by War

count

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Age Group
Veterans
75+60
55 to 6413
65 to 7410
18 to 345
35 to 544

Seneca Veterans by Age

count

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Name
Veterans
% of Total
White9010.06%
2+ Races27.41%

Seneca Veterans by Race

Seneca Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

0%

Veteran Poverty Rate

7.61%

Veteran Disability Rate

Seneca Veterans by Education

LaborForceParticipation

44.3%

Labor Force Participation

43%

Employment Rate

2.9%

Unemployment Rate

Seneca Employment by Age

LaborForceParticipation

Seneca Employment by Race

LaborForceParticipation

Seneca Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

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

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

75.11%

Born in Seneca

99.28%

Native Born

0.72%

Foreign Born

0.27%

Non Citizen

0.45%

Naturalized

Place of Birth

99.28% of Seneca residents were born in the United States, with 75.11% having been born in Michigan. 0.27% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Seneca Place of Birth

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
20291,077-7-0.65%
20281,084-7-0.64%
20271,091-7-0.64%
20261,098-7-0.63%
20251,105-7-0.63%
20241,112-7-0.63%
20231,119-7-0.62%
20221,126-7-0.62%
20211,133-8-0.7%
20201,141-47-3.96%
20191,188-1-0.08%
20181,189-5-0.42%
20171,19400%
20161,194-2-0.17%
20151,196-8-0.66%
20141,204-3-0.25%
20131,207-6-0.49%
20121,213-9-0.74%
20111,222-6-0.49%
20101,22800%

Seneca Population by Year