Union, IL Profile: Facts & Data


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Union, Illinois - Basic Facts

The Village of Union had a population of 606 as of July 1, 2020.

The primary coordinate point for Union is located at latitude 42.2331 and longitude -88.5423 in McHenry County. The formal boundaries for the Village of Union encompass a land area of 0.83 sq. miles and a water area of 0 sq. miles. McHenry County is in the Central time zone (GMT -6). The elevation is 837 feet.

The Village of Union (GNIS ID: 2400020) 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 Village of Union is located within Township of Coral, a minor civil division (MCD) of McHenry County.


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


Total Population 606 (100%)
Population in Households 606 (100.0%)
Population in Families 536 (88.4%)
Population in Group Quarters1 0
Population Density 725
Diversity Index2 16


Median Household Income $84,624
Average Household Income $130,011
% of Income for Mortgage4 12%
Per Capita Income $50,281
Wealth Index5 207


Total HU (Housing Units) 248 (100%)
Owner Occupied HU 196 (79.0%)
Renter Occupied HU 46 (18.5%)
Vacant Housing Units 7 ( 2.8%)
Median Home Value $233,750
Average Home Value $235,914
Housing Affordability Index3 172


Total Households 241
Average Household Size 2.51
Family Households 189
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 0.67% 0.65%
Households 0.94% 0.82%
Families 1.95% 0.83%
Median Household Income   1.5%
Per Capita Income   1.32%
Owner Occupied HU   0.8%


Union, IL - Peer Comparisons by Rank and Percentile

The table below compares Union 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 # 866 37th
Population Density # 926 32nd
Median Household Income # 180 87th
Housing Affordability Index # 318 23rd
Per Capita Income # 82 94th
Diversity Index # 621 55th

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

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