Olney, IL Profile: Facts & Data


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Olney, Illinois - Basic Facts

The City of Olney had a population of 9,131 as of July 1, 2018.

The primary coordinate point for Olney is located at latitude 38.7281 and longitude -88.0842 in Richland County. The formal boundaries for the City of Olney (see map below) encompass a land area of 7.08 sq. miles and a water area of 0 sq. miles. Richland County is in the Central time zone (GMT -6). The elevation is 479 feet.

The City of Olney (GNIS ID: 2396060) 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 City of Olney is located within Township of Olney, a minor civil division (MCD) of Richland County.

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  1. Olney 2018 Demographic Data
  2. Growth Rates for Olney (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

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


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


Total Population 9,131
Population in Households 8,768
Population in Familes 6,678
Population in Group Qrtrs 363
Population Density2 1,290
Diversity Index3 14


Median Household Income $37,901
Average Household Income $55,981
Per Capita Income $23,913


Total Housing Units 4,327 (100%)
Owner Occupied HU 2,187 (50.5%)
Renter Occupied HU 1,661 (38.4%)
Vacant Housing Units 479 (11.1%)
Median Home Value $88,707
Average Home Value $125,594


Total Households 3,848
Average Household Size 2.28
Family Households 2,289
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 0.01% -0.15%
Households 0.0% -0.17%
Families -0.16% -0.29%
Median Household Income   0.61%
Per Capita Income   1.51%

Olney, IL - Peer Comparisons by Rank and Percentile

The table below compares Olney to the other 1,368 incorporated cities, towns and CDPs 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 # 237 83rd
Population Density # 579 58th
Diversity Index # 639 53rd
Median Household Income # 1267 7th
Per Capita Income # 1043 24th

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

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