Gillespie, IL Profile: Facts, Map & Data


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Gillespie, Illinois - Basic Facts

The City of Gillespie had a population of 3,279 as of July 1, 2018. Gillespie ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Gillespie is located at latitude 39.1254 and longitude -89.8173 in Macoupin County. The formal boundaries for the City of Gillespie (see map below) encompass a land area of 1.49 sq. miles and a water area of 0 sq. miles. Macoupin County is in the Central time zone (GMT -6). The elevation is 656 feet.

The City of Gillespie (GNIS ID: 2394896) 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 Gillespie is located within Township of Gillespie, a minor civil division (MCD) of Macoupin County.

Beneath the boundary map are tables with Gillespie population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2018.

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City of Gillespie, IL Boundary Map

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Boundary Maps: Township of Gillespie | Macoupin County | Illinois Counties

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


Total Population 3,279
Population in Households 3,279
Population in Familes 2,640
Population in Group Qrtrs 0
Population Density2 2,209
Diversity Index3 9


Median Household Income $46,321
Average Household Income $56,725
Per Capita Income $23,205


Total Housing Units 1,519 (100%)
Owner Occupied HU 1,013 (66.7%)
Renter Occupied HU 331 (21.8%)
Vacant Housing Units 175 (11.5%)
Median Home Value $88,894
Average Home Value $115,819


Total Households 1,344
Average Household Size 2.44
Family Households 880
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 -0.15% -0.38%
Households -0.21% -0.41%
Families -0.39% -0.53%
Median Household Income   2.2%
Per Capita Income   2.43%

Gillespie, IL - Peer Comparisons by Rank and Percentile

The table below compares Gillespie 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 # 422 69th
Population Density # 226 84th
Diversity Index # 930 32nd
Median Household Income # 1005 27th
Per Capita Income # 1095 20th

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

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