Madison, IL Profile: Facts & Data


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Madison, Illinois - Basic Facts

The City of Madison had a population of 3,394 as of July 1, 2021. Madison ranks in the lower quartile for Population Density and 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 Madison is located at latitude 38.6825 and longitude -90.1571 in Madison County. The formal boundaries for the City of Madison encompass a land area of 14.52 sq. miles and a water area of 2.64 sq. miles. Madison County is in the Central time zone (GMT -6). The elevation is 413 feet.

While the primary coordinates for City of Madison are located in Madison County, it should be noted that the formal boundaries for this community also extend into and St. Clair County.

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

Jump to... (On This Page!)
  1. Madison 2021 Demographic Data
  2. Growth Rates for Madison (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 - 2021 Demographics

Madison, IL Data & Demographics (As of July 1, 2021)


Total Population 3,394 (100%)
Population in Households 3,351 (98.7%)
Population in Families 2,570 (75.7%)
Population in Group Quarters1 43 ( 1.3%)
Population Density 278
Diversity Index2 58


Median Household Income $33,340
Average Household Income $48,645
% of Income for Mortgage4 8%
Per Capita Income $18,709
Wealth Index5 38


Total HU (Housing Units) 1,896 (100%)
Owner Occupied HU 760 (40.1%)
Renter Occupied HU 611 (32.2%)
Vacant Housing Units 525 (27.7%)
Median Home Value $61,719
Average Home Value $94,474
Housing Affordability Index3 308


Total Households 1,371
Average Household Size 2.44
Family Households 813
Average Family Size 3
  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.


2010-2021 2021-2026
Population -1.23% -0.82%
Households -1.24% -0.82%
Families -1.18% -0.93%
Median Household Income   1.54%
Per Capita Income   2.23%
Owner Occupied HU   -0.32%

Madison, IL - Peer Comparisons by Rank and Percentile

The table below compares Madison to the other 1,369 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2021 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 # 410 70th
Population Density # 1212 12th
Median Household Income # 1353 1st
Housing Affordability Index # 1127 82nd
Per Capita Income # 1333 3rd
Diversity Index # 145 89th

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

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