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Janesville, IL Profile: Facts & Data

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Janesville, Illinois - Basic Facts

The Janesville CDP(1) had a population of 74 as of July 1, 2024. Janesville ranks in the lower quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Janesville is located at latitude 39.3742 and longitude -88.2437 in Cumberland County. Cumberland County is in the Central time zone (GMT -6).

While the primary coordinates for Janesville Census Designated Place are located in Cumberland County, it should be noted that the formal boundaries for this community also extend into and Coles County.

It also has a Functional Status Code of ""

The Janesville Census Designated Place is located within Township of Cottonwood, a minor civil division (MCD) of Cumberland County.


  1. A Census Designated Place (CDP) is a statistical counterpart to a self-governing (incorporated) place such as a city, town, or village. A CDP is not a legal entity and has no governmental functions.

Jump to... (On This Page!)
  1. Janesville 2024 Demographic Data
  2. Growth Rates for Janesville (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Illinois Research Tools (Easy Tools & Current Data)
  3. Illinois Data Comparison Tool - 2024 Demographics
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Janesville, IL Data & Demographics (As of July 1, 2024)

POPULATION

Total Population 74 (100%)
Population in Households 74 (100.0%)
Population in Families 63 (85.1%)
Population in Group Quarters1 0
Population Density 1,205
Diversity Index2 3
 
 

INCOME

Median Household Income $76,891
Average Household Income $103,652
% of Income for Mortgage4 0%
Per Capita Income $49,025
Wealth Index5 94
Socioeconomic Status Index6 High (65.9)
 

HOUSING

Total HU (Housing Units) 43 (100%)
Owner Occupied HU 30 (69.8%)
Renter Occupied HU 5 (11.6%)
Vacant Housing Units 8 (18.6%)
Median Home Value $166,667
Average Home Value $190,833
Housing Affordability Index3 0
 

HOUSEHOLDS

Total Households 35
Average Household Size 2.11
Family Households 26
Average Family Size 2.00
NOTES
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

GROWTH RATE / YEAR

 2020-2024 2024-2029
Population -0.63% -1.11%
Households -1.92% 0.00%
Families   1.49%
Median Household Income   8.22%
Per Capita Income   2.77%
Owner Occupied HU   2.53%

Janesville, IL - Peer Comparisons by Rank and Percentile

The table below compares Janesville to the other 1,462 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2024 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 1398 4th
Population Density # 559 62nd
Median Household Income # 639 56th
Housing Affordability Index # 38 3rd
Per Capita Income # 293 80th
Diversity Index # 1448 1st

Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.

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