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 603 as of July 1, 2017. 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, 2017.

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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, 2017)


Total Population 603
Daytime Population: Workers 108
Daytime Population: Residents 266
Total Daytime Population (TDP) 374
Ratio TDP/Total Population1 0.62
Population in Households 603
Population in Familes 508
Population in Group Qrtrs 0
Population Density2 1,056
Diversity Index3 4


Median Household Income $45,105
Average Household Income $55,391
Per Capita Income $22,000


Total Housing Units 261 (100%)
Owner Occupied HU 192 (73.6%)
Renter Occupied HU 50 (19.2%)
Vacant Housing Units 19 ( 7.3%)
Median Home Value $85,354
Average Home Value $102,083


Total Households 242
Average Household Size 2.49
Family Households 171
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  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.


2010-2017 2017-2022
Population -0.02% -0.1%
Households 0.06% 0.0%
Families 0.75% -0.12%
Median Household Income   1.86%
Per Capita Income   2.53%

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, 2017 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 # 870 36th
Population Density # 719 48th
Diversity Index # 1289 6th
Median Household Income # 1001 27th
Per Capita Income # 1136 17th

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

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