Mercer County IL Information


Mercer County Subdivisions

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  1. Mercer County 2018 Demographic Data
  2. Growth Rates forMercer County (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 - 2018 Demographics

Mercer County IL Data & Demographics (As of July 1, 2018)


Total Population 15,976
Population in Households 15,791
Population in Familes 13,196
Population in Group Qrtrs 185
Population Density2 29
Diversity Index3 10


Median Household Income $52,304
Average Household Income $67,996
Per Capita Income $28,352


Total Housing Units 7,358 (100%)
Owner Occupied HU 5,159 (70.1%)
Renter Occupied HU 1,414 (19.2%)
Vacant Housing Units 785 (10.7%)
Median Home Value $101,863
Average Home Value $135,700


Total Households 6,573
Average Household Size 2.4
Family Households 4,548
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  2. Population Density = Total Population per square mile.
  3. 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.


2010-2018 2018-2023
Population -0.34% -0.67%
Households -0.29% -0.64%
Families -0.46% -0.75%
Median Household Income   1.9%
Per Capita Income   2.91%


Mercer County IL - Peer Comparisons by Rank and Percentile

The table below compares Mercer County to the other 102 counties and county equivalents in Illinois by rank and percentile using July 1, 2018 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 # 71 31st
Population Density # 82 21st
Diversity Index # 73 29th
Median Household Income # 39 63rd
Per Capita Income # 34 68th

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

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Illinois Census Data Comparison Tool

Compare Illinois July 1, 2018 Data
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