Adair, IL Profile: Facts, Map & Data


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Adair, Illinois - Basic Facts

The Adair Census Designated Place had a population of 211 as of July 1, 2018. Adair ranks in the lower quartile for Population Density and 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 Adair is located at latitude 40.4183 and longitude -90.4974 in McDonough County. The formal boundaries for the Adair Census Designated Place (see map below) encompass a land area of 0.43 sq. miles and a water area of 0 sq. miles. McDonough County is in the Central time zone (GMT -6). The elevation is 646 feet.

The Adair Census Designated Place (GNIS ID: 2628541) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Adair Census Designated Place is located within Township of New Salem, a minor civil division (MCD) of McDonough County.

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

Alternate Unofficial Names for Adair: Reedyville.

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Adair Census Designated Place, IL Boundary Map

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Boundary Maps: Township of New Salem | McDonough County | Illinois Counties

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


Total Population 211
Population in Households 211
Population in Familes 180
Population in Group Qrtrs 0
Population Density2 491
Diversity Index3 7


Median Household Income $51,662
Average Household Income $71,747
Per Capita Income $30,084


Total Housing Units 103 (100%)
Owner Occupied HU 77 (74.8%)
Renter Occupied HU 13 (12.6%)
Vacant Housing Units 13 (12.6%)
Median Home Value $114,286
Average Home Value $128,947


Total Households 90
Average Household Size 2.34
Family Households 69
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 0.06% -0.19%
Households 0.14% 0.0%
Families 0.0% 0.0%
Median Household Income   3.9%
Per Capita Income   3.96%

Adair, IL - Peer Comparisons by Rank and Percentile

The table below compares Adair 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 # 1189 13th
Population Density # 1087 21st
Diversity Index # 1132 17th
Median Household Income # 813 41st
Per Capita Income # 494 64th

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

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