Chemung, IL Profile: Facts & Data


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Chemung, Illinois - Basic Facts

The Chemung Census Designated Place had a population of 305 as of July 1, 2020. Chemung 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 Chemung is located at latitude 42.4153 and longitude -88.6668 in McHenry County. The formal boundaries for the Chemung Census Designated Place encompass a land area of 0.28 sq. miles and a water area of 0 sq. miles. McHenry County is in the Central time zone (GMT -6). The elevation is 899 feet.

The Chemung Census Designated Place (GNIS ID: 2628545) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Chemung Census Designated Place is located within Township of Chemung, a minor civil division (MCD) of McHenry County.


Chemung, IL Data & Demographics (As of July 1, 2020)


Total Population 305 (100%)
Population in Households 305 (100.0%)
Population in Families 267 (87.5%)
Population in Group Quarters1 0
Population Density 1,085
Diversity Index2 33


Median Household Income $55,591
Average Household Income $74,416
% of Income for Mortgage4 18%
Per Capita Income $28,366
Wealth Index5 84


Total HU (Housing Units) 113 (100%)
Owner Occupied HU 86 (76.1%)
Renter Occupied HU 18 (15.9%)
Vacant Housing Units 9 ( 8.0%)
Median Home Value $235,000
Average Home Value $305,233
Housing Affordability Index3 145


Total Households 104
Average Household Size 2.93
Family Households 79
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.


2010-2020 2020-2025
Population -0.1% -0.07%
Households 0.09% 0.0%
Families 0.77% 0.0%
Median Household Income   1.31%
Per Capita Income   1.97%
Owner Occupied HU   0.0%


Chemung, IL - Peer Comparisons by Rank and Percentile

The table below compares Chemung to the other 1,369 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2020 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 # 1086 21st
Population Density # 683 50th
Median Household Income # 741 46th
Housing Affordability Index # 205 15th
Per Capita Income # 768 44th
Diversity Index # 343 75th

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

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