Janesville, Iowa Population 2024

1,062

Janesville is a city located in Black Hawk County and Bremer County Iowa. Janesville has a 2024 population of 1,062. Janesville is currently growing at a rate of 0.57% annually and its population has increased by 2.21% since the most recent census, which recorded a population of 1,039 in 2020.

The average household income in Janesville is $94,647 with a poverty rate of 3.88%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Janesville is 38.1 years, 38.8 years for males, and 37.3 years for females.

Janesville Demographics

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

  • White: 99.44%
  • Two or more races: 0.47%
  • Other race: 0.09%
  • Black or African American:
  • Native American:
  • Asian:
  • Native Hawaiian or Pacific Islander:
State
Iowa
Land Area (mi²)
1.4 sq mi
Density (mi²)
749.50/sq mi
Growth Since 2020
2.21% (23)
The current population of Janesville, Iowa is 1,062 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 1,039.

Janesville, Iowa Population 2024

Population by Race

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Race
Population
Percentage (of total)
White1,05799.44%
Two or more races50.47%
Other race10.09%
Black or African American
Native American
Asian
Native Hawaiian or Pacific Islander
showing: 7 rows

White

Two or more races

Other race

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Janesville Population by Race

Janesville Population Pyramid 2024

Janesville Median Age

38.1

Total

38.8

Male

37.3

Female

Janesville Adults

There are 747 adults, (155 of whom are seniors) in Janesville.

Janesville Age Dependency

79.6

Age Dependency Ratio

26.2

Old Age Dependency Ratio

53.4

Child Dependency Ratio

Janesville Sex Ratio

Female54851.55%
Male51548.45%

Janesville Population by Age

Janesville Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All4032.6491.68.4
Married2693.2598.51.5
Non Family1131.1573.526.5
Female142.071000
Male74.291000
showing: 5 rows

3.21

Average Family Size

2.64

Average Household Size

91.6%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Janesville Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Janesville Educational Attainment by Sex (over 25)

Janesville Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among other race people with a rate of 100%.

The highest rate of bachelors degrees is among hispanic people with a rate of 50%.

Janesville Educational Attainment by Race

All

Male

Female

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$57,800

Average Earnings

$70,455

Average Male

$46,324

Average Female

Janesville Earnings by Educational Attainment

Janesville Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Janesville Language

98.47% of Janesville residents speak only English, while 1.53% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.22% of the population.

Janesville Language

Janesville Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White1,040393.75%
Multiple5240%
showing: 2 rows

3.88%

Overall Poverty Rate

4.08%

Male Poverty Rate

3.68%

Female Poverty Rate

Poverty in Janesville

The race most likely to be in poverty in Janesville is Multiple, with 40% below the poverty level.

The race least likely to be in poverty in Janesville is White, with 3.75% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was . Among those working part-time, it was 8.66%, and for those that did not work, the poverty rate was 13.57%.

Janesville Poverty

rate

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Rate
Poverty
High School11.71%
Some College1.9%
Less Than 9th Grade
Bachelors or Greater
showing: 4 rows

Janesville Poverty Rate by Education

rate

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Rate
Poverty
Female Employed4.07%
Male Employed
Male Unemployed
Female Unemployed
showing: 4 rows

Janesville Poverty Rate by Employment Status and Sex

Janesville Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Janesville Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

66.2%

Overall Marriage Rate

63.8%

Male Marriage Rate

68.8%

Female Marriage Rate

Janesville Married by Age and Sex

male

female

Janesville Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 35-44.

Janesville Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Janesville Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

69

Number of Veterans

62

Male Veterans

7

Female Veterans

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Janesville Veterans by War

count

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Janesville Veterans by Age

count

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Janesville Veterans by Race

Janesville Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

15.94%

Veteran Poverty Rate

17.39%

Veteran Disability Rate

Janesville Veterans by Education

LaborForceParticipation

72.7%

Labor Force Participation

71.6%

Employment Rate

1.6%

Unemployment Rate

Janesville Employment by Age

LaborForceParticipation

Janesville Employment by Race

LaborForceParticipation

Janesville 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

88.05%

Born in Janesville

99.15%

Native Born

0.85%

Foreign Born

0.47%

Non Citizen

0.38%

Naturalized

Place of Birth

99.15% of Janesville residents were born in the United States, with 88.05% having been born in Iowa. 0.47% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Janesville Place of Birth

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
20291,09260.55%
20281,08660.56%
20271,08060.56%
20261,07460.56%
20251,06860.56%
20241,06260.57%
20231,05660.57%
20221,05060.57%
20211,04450.48%
20201,039515.16%
201998850.51%
201898360.61%
201797730.31%
201697440.41%
201597070.73%
2014963181.9%
201394550.53%
201294090.97%
2011931-1-0.11%
2010932
showing: 20 rows

Janesville Population by Year