Alton, IL Profile: Facts & Data

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Alton, Illinois - Basic Facts

The City of Alton had a population of 26,728 as of July 1, 2019. Alton ranks in the upper 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 Alton is located at latitude 38.8906 and longitude -90.1843 in Madison County. The formal boundaries for the City of Alton encompass a land area of 15.47 sq. miles and a water area of 1.27 sq. miles. Madison County is in the Central time zone (GMT -6). The elevation is 495 feet.

The City of Alton (GNIS ID: 2393935) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Alton is located within Township of Alton, a minor civil division (MCD) of Madison County.


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  1. Alton 2019 Demographic Data
  2. Growth Rates for Alton (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 - 2019 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2019, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


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Alton, IL Data & Demographics (As of July 1, 2019)

HOUSING AFFORDABILITY INDEX

Alton, IL Housing Affordability Index is 182
State of Illinois Housing Affordability Index is 119
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.

WEALTH INDEX

Alton, IL Wealth Index is 39
State of Illinois Wealth Index is 105
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.

These new demographic attributes are availiable for Neighborhoods, Cities, Counties, and ZIP Codes.

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  3. The new 2-Minute Introduction and Concise Guide to Big Data which will help you make the most effective use of HomeTownLocator Tools.
  4. See the References & Data Sources page for more information about methodology and sources of data.
  5. See the Illinois COVID-19 Data and US COVID-19 Data for more information on the spread of the novel coronavirus.

POPULATION

Total Population 26,728
Population in Households 26,220
Population in Families 19,471
Population in Group Qrtrs 508
Population Density 1,723
Diversity Index1 52
 

INCOME

Median Household Income $37,784
Average Household Income $49,651
Per Capita Income $20,944
Wealth Index3 39

HOUSING

Total Housing Units 13,296 (100%)
Owner Occupied HU 6,258 (47.1%)
Renter Occupied HU 5,044 (37.9%)
Vacant Housing Units 1,993 (15.0%)
Median Home Value $90,517
Housing Affordability Index2 182
 

HOUSEHOLDS

Total Households 11,303
Average Household Size 2.32
Family Households 6,495
Average Family Size 3
NOTES
  1. 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 race 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.
  2. 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.
  3. 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.

GROWTH RATE / YEAR

2010-2019 2019-2024
Population -0.46% -0.4%
Households -0.43% -0.38%
Families -0.6% -0.53%
Median Household Income   2.51%
Per Capita Income   2.83%

Alton, IL - Peer Comparisons by Rank and Percentile

The table below compares Alton to the other 1,369 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2019 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 # 82 94th
Population Density # 360 74th
Diversity Index # 179 87th
Median Household Income # 1288 6th
Per Capita Income # 1271 7th

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

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