Illinois Gazetteer
Also See Prairie du Rocher, IL: ZIP Codes & Maps
The Village of Prairie du Rocher had a population of 483 as of July 1, 2025.
The primary coordinate point for Prairie du Rocher is located at latitude 38.0831 and longitude -90.0959 in Randolph County. The formal boundaries for the Village of Prairie du Rocher 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 Village of Prairie du Rocher 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.
POPULATION | |
|---|---|
| Total Population | 483 (100%) |
| Population in Households | 483 (100.0%) |
| Population in Families | 378 (78.3%) |
| Population in Group Quarters1 | 0 |
| Population Density | 845 |
| Diversity Index2 | 15 |
INCOME | |
| Median Household Income | $76,484 |
| Average Household Income | $84,620 |
| % of Income for Mortgage4 | 12% |
| Per Capita Income | $38,719 |
| Wealth Index5 | 68 |
| Socioeconomic Status Index6 | Moderate (53.2) |
HOUSING | |
|---|---|
| Total HU (Housing Units) | 251 (100%) |
| Owner Occupied HU | 189 (75.3%) |
| Renter Occupied HU | 32 (12.7%) |
| Vacant Housing Units | 30 (12.0%) |
| Median Home Value | $144,792 |
| Average Home Value | $191,190 |
| Housing Affordability Index3 | 178 |
HOUSEHOLDS | |
| Total Households | 221 |
| Average Household Size | 2.19 |
| Family Households | 132 |
| Average Family Size | 3.00 |
GROWTH RATE / YEAR |
2020-2025 | 2025-2030 |
|---|---|---|
| Population | -0.73% | -0.50% |
| Households | 0.61% | 0.27% |
| Families | -0.46% | |
| Median Household Income | 2.22% | |
| Per Capita Income | 2.55% | |
| Owner Occupied HU | 0.11% |
The table below compares Prairie du Rocher to the other 1,461 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2025 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 | # 918 | 37th |
| Population Density | # 795 | 46th |
| Median Household Income | # 714 | 51st |
| Housing Affordability Index | # 1196 | 82nd |
| Per Capita Income | # 763 | 48th |
| Diversity Index | # 1052 | 28th |
Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.
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