Saint Charles, IL Profile: Facts & Data


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Saint Charles, Illinois - Basic Facts

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The City of Saint Charles had a population of 34,001 as of July 1, 2021. Saint Charles ranks in the upper quartile for Population Density and 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 Saint Charles is located at latitude 41.9142 and longitude -88.3087 in Kane County. The formal boundaries for the City of Saint Charles encompass a land area of 14.7 sq. miles and a water area of 0.32 sq. miles. Kane County is in the Central time zone (GMT -6). The elevation is 732 feet.

While the primary coordinates for City of Saint Charles are located in Kane County, it should be noted that the formal boundaries for this community also extend into and DuPage County.

The City of Saint Charles 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 Saint Charles is located within Township of Saint Charles, a minor civil division (MCD) of Kane County.

Alternate Unofficial Names for Saint Charles: Charleston, Waterville.

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  1. Saint Charles 2021 Demographic Data
  2. Growth Rates for Saint Charles (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

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


Total Population 34,001 (100%)
Population in Households 32,750 (96.3%)
Population in Families 27,115 (79.7%)
Population in Group Quarters1 1,251 ( 3.7%)
Population Density 2,361
Diversity Index2 42


Median Household Income $100,533
Average Household Income $132,069
% of Income for Mortgage4 13%
Per Capita Income $50,172
Wealth Index5 178


Total HU (Housing Units) 14,145 (100%)
Owner Occupied HU 8,997 (63.6%)
Renter Occupied HU 3,934 (27.8%)
Vacant Housing Units 1,214 ( 8.6%)
Median Home Value $315,902
Average Home Value $368,059
Housing Affordability Index3 152


Total Households 12,931
Average Household Size 2.53
Family Households 8,747
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 0.33% 0.55%
Households 0.43% 0.63%
Families 0.25% 0.5%
Median Household Income   1.24%
Per Capita Income   1.89%
Owner Occupied HU   0.47%

Saint Charles, IL - Peer Comparisons by Rank and Percentile

The table below compares Saint Charles 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 # 54 96th
Population Density # 189 86th
Median Household Income # 120 91st
Housing Affordability Index # 242 18th
Per Capita Income # 79 94th
Diversity Index # 254 82nd

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

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