Prairie du Rocher, IL Profile: Facts, Map & Data


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Prairie du Rocher, Illinois - Basic Facts

The Village of Prairie du Rocher had a population of 598 as of July 1, 2016. Prairie du Rocher ranks in the lower 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 Prairie du Rocher is located at latitude 38.0817 and longitude -90.0976 in Randolph County. The formal boundaries for the Village of Prairie du Rocher (see map below) encompass a land area of 0.57 sq. miles and a water area of 0 sq. miles. Randolph County is in the Central time zone (GMT -6). The elevation is 394 feet.

The Village of Prairie du Rocher (GNIS ID: 2399019) 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 Prairie du Rocher is located within Prairie du Rocher Election Precinct, a minor civil division (MCD) of Randolph County.

Beneath the boundary map are tables with Prairie du Rocher population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Neighborhood Data

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Village of Prairie du Rocher, IL Boundary Map

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Prairie du Rocher, IL Data & Demographics (As of July 1, 2016)


Total Population 598
Population in Households 598
Population in Familes 504
Population in Group Qrtrs 0
Population Density1 1,047
Diversity Index2 4


Total Households 236
Average Household Size 2.53
Family Households 167
Average Family Size 3


Total Housing Units 260 (100%)
Owner Occupied HU 188 (72.3%)
Renter Occupied HU 49 (18.8%)
Vacant Housing Units 24 ( 9.2%)
Median Home Value $85,215
Average Home Value $100,134


Median Household Income $42,032
Average Household Income $52,634
Per Capita Income $20,557
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -0.16% -0.1%
Households -0.33% -0.17%
Families 0.49% -0.24%
Median Household Income   0.83%
Per Capita Income   1.31%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Prairie du Rocher, IL - Peer Comparisons by Rank and Percentile

The table below compares Prairie du Rocher to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2016 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 # 876 36th
Population Density1 # 728 47th
Diversity Index2 # 1288 6th
Median Household Income # 1061 23rd
Per Capita Income # 1183 14th

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

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